[ python-Feature Requests-776100 ] new function 'islastline' in fileinput

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Feature Requests item #776100, was opened at 2003-07-23 02:49
Message generated for change (Comment added) made by rhettinger
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=355470&aid=776100&group_id=5470

>Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Edouard Hinard (edhi)
Assigned to: Nobody/Anonymous (nobody)
Summary: new function 'islastline' in fileinput

Initial Comment:
a function 'islastline' is missing to fileinput module.
when that function exists, it is possible to perform an
action at the end of a file like in:

for line in fileinput.input():
   processline(line)
   if fileinput.lastline():
      processfile()


Without this function, the same script looks like:

for line in fileinput.input():
   if fileinput.isfirstline() and fileinput.lineno() != 1:
      processfile()
   processline(line)
processfile()

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>Comment By: Raymond Hettinger (rhettinger)
Date: 2004-06-15 07:09

Message:
Logged In: YES 
user_id=80475

Reclassifying as a feature request.

I'm -0 on complicating this venerable interface.   Also, I
find it unnatural for the inside of a loop to be able to
ascertain whether it is in its final iteration.  The closest
approximation is the for-else clause which is vary rarely
used in normal python programming.  While the OP was able to
sketch a use case, it involved only saving a couple of lines
over what can be done with the existing API.

P.S. There is a less buggy version of the patch at 
www.python.org/sf/968063


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