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touch (Python recipe) by Trent Mick
ActiveState Code (http://code.activestate.com/recipes/576915/)

Python function a la the Unix touch program (man touch).

Python, 12 lines
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def touch(path):
    import os, time
    now = time.time()
    try:
        # assume it's there
        os.utime(path, (now, now))
    except os.error:
        # if it isn't, try creating the directory,
        # a file with that name
        os.makedirs(os.path.dirname(path))
        open(path, "w").close()
        os.utime(path, (now, now))
Tags: file, shell, touch, unix