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glesica/gist:2897794

Created June 8, 2012 19:48
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gistfile1.py
>>> a = re.compile(r'^[0-9_]+|\W|[_]+$')
>>> a.findall('__hello world')
['__', ' ']
>>> a.sub('', '__username@gmail.com_table name hello')
'usernamegmailcom_tablenamehello'
>>> a.sub('', 'a')
'a'
>>> a.sub('', '_')
''
>>> a.sub('', '0')
''
>>> b = re.compile(r'\W')
>>> b.sub('', '__username@gmail.com_table name hello')
'__usernamegmailcom_tablenamehello'
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