"""Hook to allow user-specified customization code to run. As a policy, Python doesn't run user-specified code on startup ofPython programs (interactive sessions execute the script specified inthe PYTHONSTARTUP environment variable if it exists). However, some programs or sites may find it convenient to allow usersto have a standard customization file, which gets run when a programrequests it.  This module implements such a mechanism.  A programthat wishes to use the mechanism must execute the statement     import user The user module looks for a file .pythonrc.py in the user's homedirectory and if it can be opened, execfile()s it in its own globalnamespace.  Errors during this phase are not caught; that's up to theprogram that imports the user module, if it wishes. The user's .pythonrc.py could conceivably test for sys.version if itwishes to do different things depending on the Python version. """ import os home = os.curdir                        # Defaultif 'HOME' in os.environ:    home = os.environ['HOME']elif os.name == 'posix':    home = os.path.expanduser("~/")elif os.name == 'nt':                   # Contributed by Jeff Bauer    if 'HOMEPATH' in os.environ:        if 'HOMEDRIVE' in os.environ:            home = os.environ['HOMEDRIVE'] + os.environ['HOMEPATH']        else:            home = os.environ['HOMEPATH'] pythonrc = os.path.join(home, ".pythonrc.py")try:    f = open(pythonrc)except IOError:    passelse:    f.close()    execfile(pythonrc)