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1 doctests = """ |
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2 Tests for the tokenize module. |
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3 |
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4 >>> import glob, random, sys |
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5 |
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6 The tests can be really simple. Given a small fragment of source |
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7 code, print out a table with tokens. The ENDMARK is omitted for |
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8 brevity. |
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9 |
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10 >>> dump_tokens("1 + 1") |
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11 NUMBER '1' (1, 0) (1, 1) |
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12 OP '+' (1, 2) (1, 3) |
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13 NUMBER '1' (1, 4) (1, 5) |
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14 |
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15 >>> dump_tokens("if False:\\n" |
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16 ... " # NL\\n" |
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17 ... " True = False # NEWLINE\\n") |
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18 NAME 'if' (1, 0) (1, 2) |
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19 NAME 'False' (1, 3) (1, 8) |
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20 OP ':' (1, 8) (1, 9) |
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21 NEWLINE '\\n' (1, 9) (1, 10) |
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22 COMMENT '# NL' (2, 4) (2, 8) |
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23 NL '\\n' (2, 8) (2, 9) |
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24 INDENT ' ' (3, 0) (3, 4) |
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25 NAME 'True' (3, 4) (3, 8) |
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26 OP '=' (3, 9) (3, 10) |
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27 NAME 'False' (3, 11) (3, 16) |
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28 COMMENT '# NEWLINE' (3, 17) (3, 26) |
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29 NEWLINE '\\n' (3, 26) (3, 27) |
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30 DEDENT '' (4, 0) (4, 0) |
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31 |
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32 >>> indent_error_file = \""" |
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33 ... def k(x): |
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34 ... x += 2 |
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35 ... x += 5 |
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36 ... \""" |
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37 |
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38 >>> for tok in generate_tokens(StringIO(indent_error_file).readline): pass |
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39 Traceback (most recent call last): |
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40 ... |
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41 IndentationError: unindent does not match any outer indentation level |
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42 |
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43 Test roundtrip for `untokenize`. `f` is an open file or a string. The source |
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44 code in f is tokenized, converted back to source code via tokenize.untokenize(), |
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45 and tokenized again from the latter. The test fails if the second tokenization |
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46 doesn't match the first. |
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47 |
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48 >>> def roundtrip(f): |
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49 ... if isinstance(f, str): f = StringIO(f) |
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50 ... token_list = list(generate_tokens(f.readline)) |
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51 ... f.close() |
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52 ... tokens1 = [tok[:2] for tok in token_list] |
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53 ... new_text = untokenize(tokens1) |
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54 ... readline = iter(new_text.splitlines(1)).next |
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55 ... tokens2 = [tok[:2] for tok in generate_tokens(readline)] |
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56 ... return tokens1 == tokens2 |
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57 ... |
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58 |
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59 There are some standard formattig practises that are easy to get right. |
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60 |
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61 >>> roundtrip("if x == 1:\\n" |
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62 ... " print x\\n") |
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63 True |
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64 |
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65 >>> roundtrip("# This is a comment\\n# This also") |
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66 True |
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67 |
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68 Some people use different formatting conventions, which makes |
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69 untokenize a little trickier. Note that this test involves trailing |
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70 whitespace after the colon. Note that we use hex escapes to make the |
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71 two trailing blanks apperant in the expected output. |
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72 |
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73 >>> roundtrip("if x == 1 : \\n" |
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74 ... " print x\\n") |
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75 True |
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76 |
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77 >>> f = test_support.findfile("tokenize_tests" + os.extsep + "txt") |
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78 >>> roundtrip(open(f)) |
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79 True |
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80 |
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81 >>> roundtrip("if x == 1:\\n" |
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82 ... " # A comment by itself.\\n" |
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83 ... " print x # Comment here, too.\\n" |
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84 ... " # Another comment.\\n" |
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85 ... "after_if = True\\n") |
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86 True |
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87 |
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88 >>> roundtrip("if (x # The comments need to go in the right place\\n" |
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89 ... " == 1):\\n" |
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90 ... " print 'x==1'\\n") |
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91 True |
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92 |
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93 >>> roundtrip("class Test: # A comment here\\n" |
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94 ... " # A comment with weird indent\\n" |
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95 ... " after_com = 5\\n" |
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96 ... " def x(m): return m*5 # a one liner\\n" |
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97 ... " def y(m): # A whitespace after the colon\\n" |
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98 ... " return y*4 # 3-space indent\\n") |
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99 True |
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100 |
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101 Some error-handling code |
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102 |
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103 >>> roundtrip("try: import somemodule\\n" |
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104 ... "except ImportError: # comment\\n" |
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105 ... " print 'Can not import' # comment2\\n" |
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106 ... "else: print 'Loaded'\\n") |
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107 True |
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108 |
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109 Balancing continuation |
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110 |
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111 >>> roundtrip("a = (3,4, \\n" |
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112 ... "5,6)\\n" |
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113 ... "y = [3, 4,\\n" |
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114 ... "5]\\n" |
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115 ... "z = {'a': 5,\\n" |
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116 ... "'b':15, 'c':True}\\n" |
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117 ... "x = len(y) + 5 - a[\\n" |
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118 ... "3] - a[2]\\n" |
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119 ... "+ len(z) - z[\\n" |
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120 ... "'b']\\n") |
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121 True |
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122 |
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123 Ordinary integers and binary operators |
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124 |
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125 >>> dump_tokens("0xff <= 255") |
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126 NUMBER '0xff' (1, 0) (1, 4) |
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127 OP '<=' (1, 5) (1, 7) |
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128 NUMBER '255' (1, 8) (1, 11) |
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129 >>> dump_tokens("0b10 <= 255") |
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130 NUMBER '0b10' (1, 0) (1, 4) |
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131 OP '<=' (1, 5) (1, 7) |
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132 NUMBER '255' (1, 8) (1, 11) |
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133 >>> dump_tokens("0o123 <= 0123") |
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134 NUMBER '0o123' (1, 0) (1, 5) |
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135 OP '<=' (1, 6) (1, 8) |
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136 NUMBER '0123' (1, 9) (1, 13) |
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137 >>> dump_tokens("01234567 > ~0x15") |
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138 NUMBER '01234567' (1, 0) (1, 8) |
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139 OP '>' (1, 9) (1, 10) |
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140 OP '~' (1, 11) (1, 12) |
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141 NUMBER '0x15' (1, 12) (1, 16) |
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142 >>> dump_tokens("2134568 != 01231515") |
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143 NUMBER '2134568' (1, 0) (1, 7) |
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144 OP '!=' (1, 8) (1, 10) |
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145 NUMBER '01231515' (1, 11) (1, 19) |
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146 >>> dump_tokens("(-124561-1) & 0200000000") |
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147 OP '(' (1, 0) (1, 1) |
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148 OP '-' (1, 1) (1, 2) |
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149 NUMBER '124561' (1, 2) (1, 8) |
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150 OP '-' (1, 8) (1, 9) |
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151 NUMBER '1' (1, 9) (1, 10) |
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152 OP ')' (1, 10) (1, 11) |
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153 OP '&' (1, 12) (1, 13) |
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154 NUMBER '0200000000' (1, 14) (1, 24) |
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155 >>> dump_tokens("0xdeadbeef != -1") |
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156 NUMBER '0xdeadbeef' (1, 0) (1, 10) |
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157 OP '!=' (1, 11) (1, 13) |
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158 OP '-' (1, 14) (1, 15) |
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159 NUMBER '1' (1, 15) (1, 16) |
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160 >>> dump_tokens("0xdeadc0de & 012345") |
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161 NUMBER '0xdeadc0de' (1, 0) (1, 10) |
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162 OP '&' (1, 11) (1, 12) |
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163 NUMBER '012345' (1, 13) (1, 19) |
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164 >>> dump_tokens("0xFF & 0x15 | 1234") |
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165 NUMBER '0xFF' (1, 0) (1, 4) |
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166 OP '&' (1, 5) (1, 6) |
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167 NUMBER '0x15' (1, 7) (1, 11) |
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168 OP '|' (1, 12) (1, 13) |
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169 NUMBER '1234' (1, 14) (1, 18) |
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170 |
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171 Long integers |
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172 |
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173 >>> dump_tokens("x = 0L") |
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174 NAME 'x' (1, 0) (1, 1) |
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175 OP '=' (1, 2) (1, 3) |
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176 NUMBER '0L' (1, 4) (1, 6) |
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177 >>> dump_tokens("x = 0xfffffffffff") |
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178 NAME 'x' (1, 0) (1, 1) |
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179 OP '=' (1, 2) (1, 3) |
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180 NUMBER '0xffffffffff (1, 4) (1, 17) |
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181 >>> dump_tokens("x = 123141242151251616110l") |
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182 NAME 'x' (1, 0) (1, 1) |
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183 OP '=' (1, 2) (1, 3) |
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184 NUMBER '123141242151 (1, 4) (1, 26) |
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185 >>> dump_tokens("x = -15921590215012591L") |
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186 NAME 'x' (1, 0) (1, 1) |
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187 OP '=' (1, 2) (1, 3) |
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188 OP '-' (1, 4) (1, 5) |
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189 NUMBER '159215902150 (1, 5) (1, 23) |
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190 |
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191 Floating point numbers |
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192 |
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193 >>> dump_tokens("x = 3.14159") |
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194 NAME 'x' (1, 0) (1, 1) |
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195 OP '=' (1, 2) (1, 3) |
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196 NUMBER '3.14159' (1, 4) (1, 11) |
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197 >>> dump_tokens("x = 314159.") |
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198 NAME 'x' (1, 0) (1, 1) |
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199 OP '=' (1, 2) (1, 3) |
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200 NUMBER '314159.' (1, 4) (1, 11) |
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201 >>> dump_tokens("x = .314159") |
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202 NAME 'x' (1, 0) (1, 1) |
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203 OP '=' (1, 2) (1, 3) |
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204 NUMBER '.314159' (1, 4) (1, 11) |
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205 >>> dump_tokens("x = 3e14159") |
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206 NAME 'x' (1, 0) (1, 1) |
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207 OP '=' (1, 2) (1, 3) |
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208 NUMBER '3e14159' (1, 4) (1, 11) |
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209 >>> dump_tokens("x = 3E123") |
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210 NAME 'x' (1, 0) (1, 1) |
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211 OP '=' (1, 2) (1, 3) |
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212 NUMBER '3E123' (1, 4) (1, 9) |
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213 >>> dump_tokens("x+y = 3e-1230") |
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214 NAME 'x' (1, 0) (1, 1) |
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215 OP '+' (1, 1) (1, 2) |
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216 NAME 'y' (1, 2) (1, 3) |
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217 OP '=' (1, 4) (1, 5) |
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218 NUMBER '3e-1230' (1, 6) (1, 13) |
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219 >>> dump_tokens("x = 3.14e159") |
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220 NAME 'x' (1, 0) (1, 1) |
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221 OP '=' (1, 2) (1, 3) |
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222 NUMBER '3.14e159' (1, 4) (1, 12) |
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223 |
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224 String literals |
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225 |
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226 >>> dump_tokens("x = ''; y = \\\"\\\"") |
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227 NAME 'x' (1, 0) (1, 1) |
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228 OP '=' (1, 2) (1, 3) |
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229 STRING "''" (1, 4) (1, 6) |
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230 OP ';' (1, 6) (1, 7) |
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231 NAME 'y' (1, 8) (1, 9) |
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232 OP '=' (1, 10) (1, 11) |
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233 STRING '""' (1, 12) (1, 14) |
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234 >>> dump_tokens("x = '\\\"'; y = \\\"'\\\"") |
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235 NAME 'x' (1, 0) (1, 1) |
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236 OP '=' (1, 2) (1, 3) |
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237 STRING '\\'"\\'' (1, 4) (1, 7) |
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238 OP ';' (1, 7) (1, 8) |
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239 NAME 'y' (1, 9) (1, 10) |
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240 OP '=' (1, 11) (1, 12) |
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241 STRING '"\\'"' (1, 13) (1, 16) |
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242 >>> dump_tokens("x = \\\"doesn't \\\"shrink\\\", does it\\\"") |
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243 NAME 'x' (1, 0) (1, 1) |
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244 OP '=' (1, 2) (1, 3) |
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245 STRING '"doesn\\'t "' (1, 4) (1, 14) |
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246 NAME 'shrink' (1, 14) (1, 20) |
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247 STRING '", does it"' (1, 20) (1, 31) |
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248 >>> dump_tokens("x = u'abc' + U'ABC'") |
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249 NAME 'x' (1, 0) (1, 1) |
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250 OP '=' (1, 2) (1, 3) |
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251 STRING "u'abc'" (1, 4) (1, 10) |
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252 OP '+' (1, 11) (1, 12) |
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253 STRING "U'ABC'" (1, 13) (1, 19) |
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254 >>> dump_tokens('y = u"ABC" + U"ABC"') |
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255 NAME 'y' (1, 0) (1, 1) |
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256 OP '=' (1, 2) (1, 3) |
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257 STRING 'u"ABC"' (1, 4) (1, 10) |
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258 OP '+' (1, 11) (1, 12) |
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259 STRING 'U"ABC"' (1, 13) (1, 19) |
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260 >>> dump_tokens("x = ur'abc' + Ur'ABC' + uR'ABC' + UR'ABC'") |
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261 NAME 'x' (1, 0) (1, 1) |
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262 OP '=' (1, 2) (1, 3) |
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263 STRING "ur'abc'" (1, 4) (1, 11) |
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264 OP '+' (1, 12) (1, 13) |
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265 STRING "Ur'ABC'" (1, 14) (1, 21) |
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266 OP '+' (1, 22) (1, 23) |
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267 STRING "uR'ABC'" (1, 24) (1, 31) |
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268 OP '+' (1, 32) (1, 33) |
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269 STRING "UR'ABC'" (1, 34) (1, 41) |
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270 >>> dump_tokens('y = ur"abc" + Ur"ABC" + uR"ABC" + UR"ABC"') |
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271 NAME 'y' (1, 0) (1, 1) |
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272 OP '=' (1, 2) (1, 3) |
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273 STRING 'ur"abc"' (1, 4) (1, 11) |
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274 OP '+' (1, 12) (1, 13) |
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275 STRING 'Ur"ABC"' (1, 14) (1, 21) |
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276 OP '+' (1, 22) (1, 23) |
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277 STRING 'uR"ABC"' (1, 24) (1, 31) |
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278 OP '+' (1, 32) (1, 33) |
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279 STRING 'UR"ABC"' (1, 34) (1, 41) |
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280 |
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281 Operators |
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282 |
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283 >>> dump_tokens("def d22(a, b, c=2, d=2, *k): pass") |
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284 NAME 'def' (1, 0) (1, 3) |
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285 NAME 'd22' (1, 4) (1, 7) |
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286 OP '(' (1, 7) (1, 8) |
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287 NAME 'a' (1, 8) (1, 9) |
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288 OP ',' (1, 9) (1, 10) |
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289 NAME 'b' (1, 11) (1, 12) |
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290 OP ',' (1, 12) (1, 13) |
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291 NAME 'c' (1, 14) (1, 15) |
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292 OP '=' (1, 15) (1, 16) |
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293 NUMBER '2' (1, 16) (1, 17) |
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294 OP ',' (1, 17) (1, 18) |
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295 NAME 'd' (1, 19) (1, 20) |
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296 OP '=' (1, 20) (1, 21) |
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297 NUMBER '2' (1, 21) (1, 22) |
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298 OP ',' (1, 22) (1, 23) |
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299 OP '*' (1, 24) (1, 25) |
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300 NAME 'k' (1, 25) (1, 26) |
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301 OP ')' (1, 26) (1, 27) |
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302 OP ':' (1, 27) (1, 28) |
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303 NAME 'pass' (1, 29) (1, 33) |
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304 >>> dump_tokens("def d01v_(a=1, *k, **w): pass") |
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305 NAME 'def' (1, 0) (1, 3) |
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306 NAME 'd01v_' (1, 4) (1, 9) |
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307 OP '(' (1, 9) (1, 10) |
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308 NAME 'a' (1, 10) (1, 11) |
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309 OP '=' (1, 11) (1, 12) |
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310 NUMBER '1' (1, 12) (1, 13) |
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311 OP ',' (1, 13) (1, 14) |
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312 OP '*' (1, 15) (1, 16) |
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313 NAME 'k' (1, 16) (1, 17) |
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314 OP ',' (1, 17) (1, 18) |
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315 OP '**' (1, 19) (1, 21) |
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316 NAME 'w' (1, 21) (1, 22) |
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317 OP ')' (1, 22) (1, 23) |
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318 OP ':' (1, 23) (1, 24) |
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319 NAME 'pass' (1, 25) (1, 29) |
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320 |
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321 Comparison |
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322 |
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323 >>> dump_tokens("if 1 < 1 > 1 == 1 >= 5 <= 0x15 <= 0x12 != " + |
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324 ... "1 and 5 in 1 not in 1 is 1 or 5 is not 1: pass") |
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325 NAME 'if' (1, 0) (1, 2) |
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326 NUMBER '1' (1, 3) (1, 4) |
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327 OP '<' (1, 5) (1, 6) |
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328 NUMBER '1' (1, 7) (1, 8) |
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329 OP '>' (1, 9) (1, 10) |
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330 NUMBER '1' (1, 11) (1, 12) |
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331 OP '==' (1, 13) (1, 15) |
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332 NUMBER '1' (1, 16) (1, 17) |
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333 OP '>=' (1, 18) (1, 20) |
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334 NUMBER '5' (1, 21) (1, 22) |
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335 OP '<=' (1, 23) (1, 25) |
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336 NUMBER '0x15' (1, 26) (1, 30) |
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337 OP '<=' (1, 31) (1, 33) |
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338 NUMBER '0x12' (1, 34) (1, 38) |
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339 OP '!=' (1, 39) (1, 41) |
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340 NUMBER '1' (1, 42) (1, 43) |
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341 NAME 'and' (1, 44) (1, 47) |
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342 NUMBER '5' (1, 48) (1, 49) |
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343 NAME 'in' (1, 50) (1, 52) |
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344 NUMBER '1' (1, 53) (1, 54) |
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345 NAME 'not' (1, 55) (1, 58) |
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346 NAME 'in' (1, 59) (1, 61) |
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347 NUMBER '1' (1, 62) (1, 63) |
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348 NAME 'is' (1, 64) (1, 66) |
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349 NUMBER '1' (1, 67) (1, 68) |
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350 NAME 'or' (1, 69) (1, 71) |
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351 NUMBER '5' (1, 72) (1, 73) |
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352 NAME 'is' (1, 74) (1, 76) |
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353 NAME 'not' (1, 77) (1, 80) |
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354 NUMBER '1' (1, 81) (1, 82) |
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355 OP ':' (1, 82) (1, 83) |
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356 NAME 'pass' (1, 84) (1, 88) |
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357 |
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358 Shift |
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359 |
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360 >>> dump_tokens("x = 1 << 1 >> 5") |
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361 NAME 'x' (1, 0) (1, 1) |
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362 OP '=' (1, 2) (1, 3) |
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363 NUMBER '1' (1, 4) (1, 5) |
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364 OP '<<' (1, 6) (1, 8) |
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365 NUMBER '1' (1, 9) (1, 10) |
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366 OP '>>' (1, 11) (1, 13) |
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367 NUMBER '5' (1, 14) (1, 15) |
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368 |
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369 Additive |
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370 |
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371 >>> dump_tokens("x = 1 - y + 15 - 01 + 0x124 + z + a[5]") |
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372 NAME 'x' (1, 0) (1, 1) |
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373 OP '=' (1, 2) (1, 3) |
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374 NUMBER '1' (1, 4) (1, 5) |
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375 OP '-' (1, 6) (1, 7) |
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376 NAME 'y' (1, 8) (1, 9) |
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377 OP '+' (1, 10) (1, 11) |
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378 NUMBER '15' (1, 12) (1, 14) |
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379 OP '-' (1, 15) (1, 16) |
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380 NUMBER '01' (1, 17) (1, 19) |
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381 OP '+' (1, 20) (1, 21) |
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382 NUMBER '0x124' (1, 22) (1, 27) |
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383 OP '+' (1, 28) (1, 29) |
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384 NAME 'z' (1, 30) (1, 31) |
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385 OP '+' (1, 32) (1, 33) |
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386 NAME 'a' (1, 34) (1, 35) |
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387 OP '[' (1, 35) (1, 36) |
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388 NUMBER '5' (1, 36) (1, 37) |
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389 OP ']' (1, 37) (1, 38) |
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390 |
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391 Multiplicative |
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392 |
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393 >>> dump_tokens("x = 1//1*1/5*12%0x12") |
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394 NAME 'x' (1, 0) (1, 1) |
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395 OP '=' (1, 2) (1, 3) |
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396 NUMBER '1' (1, 4) (1, 5) |
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397 OP '//' (1, 5) (1, 7) |
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398 NUMBER '1' (1, 7) (1, 8) |
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399 OP '*' (1, 8) (1, 9) |
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400 NUMBER '1' (1, 9) (1, 10) |
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401 OP '/' (1, 10) (1, 11) |
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402 NUMBER '5' (1, 11) (1, 12) |
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403 OP '*' (1, 12) (1, 13) |
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404 NUMBER '12' (1, 13) (1, 15) |
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405 OP '%' (1, 15) (1, 16) |
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406 NUMBER '0x12' (1, 16) (1, 20) |
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407 |
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408 Unary |
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409 |
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410 >>> dump_tokens("~1 ^ 1 & 1 |1 ^ -1") |
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411 OP '~' (1, 0) (1, 1) |
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412 NUMBER '1' (1, 1) (1, 2) |
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413 OP '^' (1, 3) (1, 4) |
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414 NUMBER '1' (1, 5) (1, 6) |
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415 OP '&' (1, 7) (1, 8) |
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416 NUMBER '1' (1, 9) (1, 10) |
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417 OP '|' (1, 11) (1, 12) |
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418 NUMBER '1' (1, 12) (1, 13) |
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419 OP '^' (1, 14) (1, 15) |
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420 OP '-' (1, 16) (1, 17) |
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421 NUMBER '1' (1, 17) (1, 18) |
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422 >>> dump_tokens("-1*1/1+1*1//1 - ---1**1") |
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423 OP '-' (1, 0) (1, 1) |
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424 NUMBER '1' (1, 1) (1, 2) |
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425 OP '*' (1, 2) (1, 3) |
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426 NUMBER '1' (1, 3) (1, 4) |
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427 OP '/' (1, 4) (1, 5) |
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428 NUMBER '1' (1, 5) (1, 6) |
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429 OP '+' (1, 6) (1, 7) |
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430 NUMBER '1' (1, 7) (1, 8) |
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431 OP '*' (1, 8) (1, 9) |
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432 NUMBER '1' (1, 9) (1, 10) |
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433 OP '//' (1, 10) (1, 12) |
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434 NUMBER '1' (1, 12) (1, 13) |
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435 OP '-' (1, 14) (1, 15) |
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436 OP '-' (1, 16) (1, 17) |
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437 OP '-' (1, 17) (1, 18) |
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438 OP '-' (1, 18) (1, 19) |
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439 NUMBER '1' (1, 19) (1, 20) |
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440 OP '**' (1, 20) (1, 22) |
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441 NUMBER '1' (1, 22) (1, 23) |
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442 |
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443 Selector |
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444 |
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445 >>> dump_tokens("import sys, time\\nx = sys.modules['time'].time()") |
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446 NAME 'import' (1, 0) (1, 6) |
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447 NAME 'sys' (1, 7) (1, 10) |
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448 OP ',' (1, 10) (1, 11) |
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449 NAME 'time' (1, 12) (1, 16) |
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450 NEWLINE '\\n' (1, 16) (1, 17) |
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451 NAME 'x' (2, 0) (2, 1) |
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452 OP '=' (2, 2) (2, 3) |
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453 NAME 'sys' (2, 4) (2, 7) |
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454 OP '.' (2, 7) (2, 8) |
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455 NAME 'modules' (2, 8) (2, 15) |
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456 OP '[' (2, 15) (2, 16) |
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457 STRING "'time'" (2, 16) (2, 22) |
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458 OP ']' (2, 22) (2, 23) |
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459 OP '.' (2, 23) (2, 24) |
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460 NAME 'time' (2, 24) (2, 28) |
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461 OP '(' (2, 28) (2, 29) |
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462 OP ')' (2, 29) (2, 30) |
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463 |
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464 Methods |
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465 |
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466 >>> dump_tokens("@staticmethod\\ndef foo(x,y): pass") |
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467 OP '@' (1, 0) (1, 1) |
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468 NAME 'staticmethod (1, 1) (1, 13) |
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469 NEWLINE '\\n' (1, 13) (1, 14) |
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470 NAME 'def' (2, 0) (2, 3) |
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471 NAME 'foo' (2, 4) (2, 7) |
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472 OP '(' (2, 7) (2, 8) |
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473 NAME 'x' (2, 8) (2, 9) |
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474 OP ',' (2, 9) (2, 10) |
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475 NAME 'y' (2, 10) (2, 11) |
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476 OP ')' (2, 11) (2, 12) |
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477 OP ':' (2, 12) (2, 13) |
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478 NAME 'pass' (2, 14) (2, 18) |
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479 |
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480 Backslash means line continuation, except for comments |
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481 |
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482 >>> roundtrip("x=1+\\\\n" |
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483 ... "1\\n" |
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484 ... "# This is a comment\\\\n" |
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485 ... "# This also\\n") |
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486 True |
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487 >>> roundtrip("# Comment \\\\nx = 0") |
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488 True |
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489 |
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490 Two string literals on the same line |
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491 |
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492 >>> roundtrip("'' ''") |
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493 True |
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494 |
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495 Test roundtrip on random python modules. |
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496 pass the '-ucompiler' option to process the full directory. |
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497 |
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498 >>> |
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499 >>> tempdir = os.path.dirname(f) or os.curdir |
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500 >>> testfiles = glob.glob(os.path.join(tempdir, "test*.py")) |
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501 |
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502 >>> if not test_support.is_resource_enabled("compiler"): |
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503 ... testfiles = random.sample(testfiles, 10) |
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504 ... |
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505 >>> for testfile in testfiles: |
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506 ... if not roundtrip(open(testfile)): |
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507 ... print "Roundtrip failed for file %s" % testfile |
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508 ... break |
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509 ... else: True |
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510 True |
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511 """ |
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512 |
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513 |
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514 from test import test_support |
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515 from tokenize import (tokenize, untokenize, generate_tokens, NUMBER, NAME, OP, |
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516 STRING, ENDMARKER, tok_name) |
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517 from StringIO import StringIO |
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518 import os |
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519 |
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520 def dump_tokens(s): |
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521 """Print out the tokens in s in a table format. |
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522 |
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523 The ENDMARKER is omitted. |
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524 """ |
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525 f = StringIO(s) |
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526 for type, token, start, end, line in generate_tokens(f.readline): |
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527 if type == ENDMARKER: |
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528 break |
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529 type = tok_name[type] |
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530 print("%(type)-10.10s %(token)-13.13r %(start)s %(end)s" % locals()) |
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531 |
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532 # This is an example from the docs, set up as a doctest. |
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533 def decistmt(s): |
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534 """Substitute Decimals for floats in a string of statements. |
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535 |
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536 >>> from decimal import Decimal |
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537 >>> s = 'print +21.3e-5*-.1234/81.7' |
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538 >>> decistmt(s) |
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539 "print +Decimal ('21.3e-5')*-Decimal ('.1234')/Decimal ('81.7')" |
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540 |
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541 The format of the exponent is inherited from the platform C library. |
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542 Known cases are "e-007" (Windows) and "e-07" (not Windows). Since |
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543 we're only showing 12 digits, and the 13th isn't close to 5, the |
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544 rest of the output should be platform-independent. |
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545 |
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546 >>> exec(s) #doctest: +ELLIPSIS |
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547 -3.21716034272e-0...7 |
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548 |
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549 Output from calculations with Decimal should be identical across all |
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550 platforms. |
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551 |
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552 >>> exec(decistmt(s)) |
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553 -3.217160342717258261933904529E-7 |
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554 """ |
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555 |
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556 result = [] |
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557 g = generate_tokens(StringIO(s).readline) # tokenize the string |
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558 for toknum, tokval, _, _, _ in g: |
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559 if toknum == NUMBER and '.' in tokval: # replace NUMBER tokens |
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560 result.extend([ |
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561 (NAME, 'Decimal'), |
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562 (OP, '('), |
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563 (STRING, repr(tokval)), |
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564 (OP, ')') |
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565 ]) |
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566 else: |
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567 result.append((toknum, tokval)) |
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568 return untokenize(result) |
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569 |
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570 |
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571 __test__ = {"doctests" : doctests, 'decistmt': decistmt} |
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572 |
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573 |
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574 def test_main(): |
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575 from test import test_tokenize |
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576 test_support.run_doctest(test_tokenize, True) |
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577 |
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578 if __name__ == "__main__": |
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579 test_main() |