Python Regex, re.sub, replacing multiple parts of pattern?

Question

I can\'t seem to find a good resource on this.. I am trying to do a simple re.place

I want to replace the part where its (.*?), but can\'t figure out the syntax on how t

Answer 1

>>> import re
>>> originalstring = 'fksf var:asfkj;'
>>> pattern = '.*?var:(.*?);'
>>> pattern_obj = re.compile(pattern, re.MULTILINE)
>>> replacement_string="\\1" + 'test'
>>> pattern_obj.sub(replacement_string, originalstring)
'asfkjtest'

Edit: The Python Docs can be pretty useful reference.

Answer 2

The python docs are online, and the one for the re module is here. http://docs.python.org/library/re.html

To answer your question though, Python uses \1 rather than $1 to refer to matched groups.

Answer 3

>>> import re
>>> regex = re.compile(r".*?var:(.*?);")
>>> regex.sub(r"\1test", "fksf var:asfkj;")
'asfkjtest'