1 """Hook to allow user-specified customization code to run.

     2 

     3 As a policy, Python doesn't run user-specified code on startup of

     4 Python programs (interactive sessions execute the script specified in

     5 the PYTHONSTARTUP environment variable if it exists).

     6 

     7 However, some programs or sites may find it convenient to allow users

     8 to have a standard customization file, which gets run when a program

     9 requests it.  This module implements such a mechanism.  A program

    10 that wishes to use the mechanism must execute the statement

    11 

    12     import user

    13 

    14 The user module looks for a file .pythonrc.py in the user's home

    15 directory and if it can be opened, execfile()s it in its own global

    16 namespace.  Errors during this phase are not caught; that's up to the

    17 program that imports the user module, if it wishes.

    18 

    19 The user's .pythonrc.py could conceivably test for sys.version if it

    20 wishes to do different things depending on the Python version.

    21 

    22 """

    23 

    24 import os

    25 

    26 home = os.curdir                        # Default

    27 if 'HOME' in os.environ:

    28     home = os.environ['HOME']

    29 elif os.name == 'posix':

    30     home = os.path.expanduser("~/")

    31 elif os.name == 'nt':                   # Contributed by Jeff Bauer

    32     if 'HOMEPATH' in os.environ:

    33         if 'HOMEDRIVE' in os.environ:

    34             home = os.environ['HOMEDRIVE'] + os.environ['HOMEPATH']

    35         else:

    36             home = os.environ['HOMEPATH']

    37 

    38 pythonrc = os.path.join(home, ".pythonrc.py")

    39 try:

    40     f = open(pythonrc)

    41 except IOError:

    42     pass

    43 else:

    44     f.close()

    45     execfile(pythonrc)