> In apple's terminal app I can type:
>
> touch ~/Desktop/foobar
>
> and create an empty file.
Keep in mind Touch is not just used to create a empty file...
To create a empty file...
def file_to_create ( filepathname ):
empty = open ( filepathname, "w" )
empty.close ()
But touch can be used to update a existing file's time/date stamp.
Here's a limited tested Touch clone:
def touch ( filepathname, atime = None, mtime = None ):
"""An attempt to recreate in python Unix's Touch command...
Set the access and modified times of the file specified by path.
If atime and mtime are set to None (Default), then the file's access
and modified times are set to the current time. Otherwise, atime
(Last Accessed) time, and mtime (Last Modified) will be used to
set the Last Accessed and Last Modified timedate stamp on the file.
inputs -
filepathname - The full filename and pathname of the file
to
be modified or created. The file will
be
created if it does not exist.
atime - The last Accessed time to set the file to.
mtime - The last modified time to set the file to.
Outputs -
External ; filepathname is either created, or the
time/date stamp is updated to reflect the current time,
or the times passed in by atime and mtime.
"""
import os, os.path, time
if os.path.exists (filepathname):
#
# File Exists
#
if atime == None and mtime == None:
#
# Update to current time
#
os.utime( filepathname, None)
else:
#
# Update to user definied times
#
if atime == None:
#
# Only one of the variables is None, set it to NOW
#
atime = time.time()
if mtime == None:
#
# Only one of the variables is None, set it to NOW
#
mtime = time.time()
os.utime (filepathname, (atime, mtime) )
else:
empty = open ( filepathname, "w" )
empty.close ()
if atime <> None and mtime <> None:
#
# The user wants the newly created file to be
# time/date stamped differently then "Now".
# Run the newly created file through touch again
# to define the atime and mtime.
#
touch ( filepathname, atime, mtime)
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