From Python Regular Expression operations - re. Sub(pattern, repl, string, count, flags) In addition to character escapes and backreferences as described above g...) syntax g0 20 would be interpreted as a reference to group 20, not a reference to group 2 followed by the literal character '0'. The backreference g.
From Python Regular Expression operations - re. Sub(pattern, repl, string, count, flags) In addition to character escapes and backreferences as described above, \g will use the substring matched by the group named name, as defined by the (?P...) syntax. \g uses the corresponding group number; \g is therefore equivalent to \2, but isn’t ambiguous in a replacement such as \g0.
\20 would be interpreted as a reference to group 20, not a reference to group 2 followed by the literal character '0'. The backreference \g substitutes in the entire substring matched by the RE.
Thanks a lot guys – savruk Feb 16 at 9:41.
I am trying to apply some regular expression(search/replace) on xml. Yes I have to use some lib.'s but in that case I cannot. My problem is ,as you may figure out, replacing value of node with an integer.
When I try that, it gives me grouping error. As you see fifth group becomes "\5123" in replace pattern. And of course it doesn't work.
But I don't want a space or something else there.
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