You asked for parsing, here's some pyparsing. Download pyparsing at
http://pyparsing.sourceforge.net.
-- Paul
from pyparsing import *
IMPORT = Keyword("import")
AS = Keyword("as")
FROM = Keyword("from")
ident = Word(alphas+"_", alphanums+"_")
import1 = Group( IMPORT + ident + Optional( AS + ident ) )
import2 = Group( FROM + ident + IMPORT +
("*" | delimitedList( ident + Optional( AS + ident ) ) ) )
imports = import1 | import2
comment = "#" + restOfLine
imports.ignore(comment)
test = """
import useful
from useful import *
from useful import turn_around, turn_right, climb_up_east
import useful as use
from useful import turn_right
from useful import turn_right
from useful import turn_right as vire_a_droite, turn_left as
drehen_nach_links
import sys
from sys import *
# import in comment
# import sys
import useful
import sys
"""
results = OneOrMore( imports ).parseString( test )
for imp in results:
print imp
===========
prints:
['import', 'useful']
['from', 'useful', 'import', '*']
['from', 'useful', 'import', 'turn_around', 'turn_right',
'climb_up_east']
['import', 'useful', 'as', 'use']
['from', 'useful', 'import', 'turn_right']
['from', 'useful', 'import', 'turn_right']
['from', 'useful', 'import', 'turn_right', 'as', 'vire_a_droite',
'turn_left', 'as', 'drehen_nach_links']
['import', 'sys']
['from', 'sys', 'import', '*']
['import', 'useful']
['import', 'sys']
--
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