[ python-Feature Requests-1491485 ] str.startswith/endswith could take a tuple?

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Feature Requests item #1491485, was opened at 2006-05-19 05:24
Message generated for change (Settings changed) made by rhettinger
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Category: Python Library
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Tom Lynn (tlynn)
>Assigned to: Georg Brandl (gbrandl)
Summary: str.startswith/endswith could take a tuple?

Initial Comment:
In the same way that exceptions can have a tuple of 
types specified and isinstance can take a tuple of 
types, str.startswith and endswith could take a tuple 
of possible prefixes/suffixes.

One use-case::
    if filename.endswith(('jpg', 'gif', 'png')):
         # ...
vs:
    if (filename.endswith('jpg') or filename.endswith
('gif') or
        filename.endswith('png')):
        #...

Obviously it's not a huge improvement in clarity, but 
it does seem to be an improvement to me.


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>Comment By: Raymond Hettinger (rhettinger)
Date: 2006-06-05 19:30

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Georg, would you like to implement this one?

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Comment By: Raymond Hettinger (rhettinger)
Date: 2006-06-05 11:33

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The previous comment was just information.  I am +1 on the
proposal because the use case is so common and the proposed
form is concise, clear, and natural.

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Comment By: Raymond Hettinger (rhettinger)
Date: 2006-05-19 15:58

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FWIW, in Py2.5, this would be written:

   if any(filename.startswith(s) for s in suffixes):
      . . .

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