jakecjacobson wrote:
This seems like a real simple newbie question but how can a person
unencode a string? In Perl I use something like: "$part=~ s/\%([A-Fa-
f0-9]{2})/pack('C', hex($1))/seg;"
If I have a string like Word1%20Word2%20Word3 I want to get Word1
Word2 Word3. Would also like to handle special characters like '",(){}
[] etc/
The Python equivalent of your regular expression code is:
>>> import re
>>> s = "Word1%20Word2%20Word3"
>>> re.sub(r"%([A-Fa-f0-9]{2})", lambda m: chr(int(m.group(1), 16)), s)
'Word1 Word2 Word3'
The replacement is a lambda expression (an anonymous function), which is
called for each match with the match object and it works like this:
m # m is the match object
m.group(1) # get group 1 (the 2 hex digits)
int(m.group(1), 16) # convert to an integer
chr(int(m.group(1), 16)) # convert to a character
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