doing hundreds of re.subs efficiently on large strings
exnihilo at NOmyrealCAPSbox.com
Tue Mar 25 22:46:04 CET 2003
I have a simple application that converts a file in one format to a file
in another format using string.replace and re.sub. There are about 150
replacements occuring on files that are on the order of a few KB. Right
now, I represent the file contents as a string, and naively use
string.replace and re.sub to replace all the substrings that I need to
replace. I knew that I would have to come up with a faster, more memory
friendly solution eventually, but I just wanted to implement the basic
idea as simply as possible at first.
Now I am at a loss as to how to proceed. I need a stringbuffer
equivalent that supports at least re.sub. Two alternatives that I have
seen for StringBuffer are using lists and then joining into a string at
the end, or using an array. Neither of these seems to be of much use to
me, since I am doing more than just appending to the end of the string.
Is there another pre-existing alternative that I'm overlooking? Or has
anybody come up with a good solution for this issue?
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