[Tutor] Pythonic way to extract delimited substrings
Suggestions on the best way to extract delimited substrings strings from
a larger string?
Background: I have a long multi-line string with expressions delimited
with '(' and ')' markers. I would like to extract these substrings and
process them in a loop.
Because the left and right delimiters are different from each other
*and* multi-char strings, it would appear that the .split() method would
not be an appropriate tool for this work.
I know how to do this task with regular expressions, but I'm always
cautious about using a bazooka when a hammer will suffice.
What strategy would you recommend?
1. Write a simple parsing function using string primitives (find,
slicing)
2. Use regular expressions
3. Use a 3rd party string processing module
Thanks!
Malcolm
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Re: [Tutor] Pythonic way to extract delimited substrings
Malcolm Greene wrote:
Suggestions on the best way to extract delimited substrings strings from
a larger string?
Background: I have a long multi-line string with expressions delimited
with '(' and ')' markers. I would like to extract these substrings and
process them in a loop.
What strategy would you recommend?
If you just want to get the text between ( and ), re.findall() or
re.finditer() is probably the simplest way to do it. If it is more
complicated than that (e.g. nesting, escape chars) then I would probably
look at pyparsing.
Kent
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Re: [Tutor] Pythonic way to extract delimited substrings
Malcolm Greene [EMAIL PROTECTED] wrote in
Background: I have a long multi-line string with expressions
delimited
with '(' and ')' markers. I would like to extract these substrings
and
process them in a loop.
I know how to do this task with regular expressions, but I'm always
cautious about using a bazooka when a hammer will suffice.
Sounds like an ideal candidate for regex and findall to me.
If you have to stop a tank a bazooka may be the right tool...
Alan G.
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