[Python-Dev] Discordance in documentation...
gminick at hacker.pl
Thu Sep 4 23:04:48 EDT 2003
...or is this just me?
Let's take a look, Reference Lib, 4.2.1 Regular Expression Syntax says:
A|B, where A and B can be arbitrary REs, creates a regular
expression that will match either A or B.
REs separated by "|" are tried from left to right, and the
first one that allows the complete pattern to match is considered
the accepted branch. This means that if A matches, B will never
be tested, even if it would produce a longer overall match. [...]
And now a little test:
a = "Fuentes Rushdie Marquez"
print re.search("Rushdie|Fuentes", a).group() # returns "Fuentes"
According to the documentation I suspected it will return "Rushdie"
rather than "Fuentes", but it looks like it returns first part of the
string that matches rather than first part of regular expression.
[ Wojtek Walczak - gminick (at) underground.org.pl ]
[ <http://gminick.linuxsecurity.pl/> ]
[ "...rozmaite zwroty, matowe od patyny dawnosci." ]
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