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#!/usr/bin/python
# Filename: using_name.py
if __name__ == '__main__':
print 'This program is being run by itself'
else:
print 'I am being imported from another module'
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$ python using_name.py
This program is being run by itself
$ python
>>> import using_name
I am being imported from another module
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>>> s = datetime.datetime(2009,1,1)
>>> time.mktime(s.timetuple())
1230739200.0
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from http://blog.alexa-pro.cn/?p=349
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