重新编译多次

Question

I am trying some regexes in python but i keep on getting this error

Multiple repeat

import re
z = "\\w\\w(?:\\w+\\.)*+"
re.compile(z)

How can i resolve this error?

Answer 1

You are using a possessive quantifier *+ and don think you really need it.

Try changing your regex to:

\\w\\w(?:\\w+\\.)*

Update: as Casimir et Hippolyte commented in your question, your problem is on the possessive quantifier:

The re module doesn't support possessive quantifiers +. If you really need them (that is not the case with your pattern), use the regex module instead (pypi.python.org/pypi/regex). Note: if you don't want to use double backslashes everywhere, use raw strings: r'\\w\\w(?:\\w+.) '

Answer 2

您的正则表达式中不能同时包含*和+ 。