Re: Correct syntax for pathological re.search()

Peter J. Holzer ha scritto:

As a trivial example, the regular expressions r"\sout{" and r"\sout\{"
are equivalent (the \ before the { is redundant). Yet
re.compile(s).pattern preserves the difference between the two strings.

Hi,
Allow me to be fussy: r"\sout{" and r"\sout\{" are similar but not
equivalent. If you omit the backslash, the parser will have to determine
if the graph is part of regular expression {n, m} and will take more
time. In some online regexs have these results:
r"\sout{"   :   1 match ( 7 steps, 620 μs )
r"\sout\{"  :   1 match ( 7 steps, 360 μs )