[ python-Feature Requests-1190701 ] Add 'before' and 'after' methods to Strings

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Feature Requests item #1190701, was opened at 2005-04-26 20:35
Message generated for change (Comment added) made by rhettinger
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Category: Python Library
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Christopher Dunn (cxdunn)
Assigned to: Nobody/Anonymous (nobody)
Summary: Add 'before' and 'after' methods to Strings

Initial Comment:
GNU String used to have two very useful methods,
'before' and 'after'. These are so useful I keep them
defined in an __init__.py file. (Unfortunately, I do
not know how to make them methods, instead of global
functions.)

Usage:

>>> "root.sub".before(".")
'root'
>>> "root.sub1.sub2".after("root.sub1")
'.sub2'

They work like s.split(word)[0], and s.split(word)[-1],
but they are so intuitive they ought to be part of the
interface.

I'm not sure whether they should raise exceptions on
failure, or simply return the whole string.

-cxdunn

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>Comment By: Raymond Hettinger (rhettinger)
Date: 2005-04-28 00:15

Message:
Logged In: YES 
user_id=80475

I'm -1 on expanding the string API for something so easily
coded with existing primitives:

>>> s = "root.sub"
>>> t = "."
>>> s[:s.find(t)]
'root'

>>> s = "root.sub1.sub2"
>>> t = "root.sub1"
>>> s[s.find(sep)+len(sep):]
'sub1.sub2'

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