[Python-ideas] Is there a reason why file.readlines() doesn't/can't return an iterator?
merwok at netwok.org
Wed Nov 30 16:51:27 CET 2011
Le 30/11/2011 14:59, Peter Otten a écrit :
> My observation on the Tutor mailing list is that there are no valid
> uses of readlines().
I disagree :) You don’t always read big files, or you may prefer to
close the file handle early at the cost of memory, or you need a list to
do some processing that works with lists but not iterators. FWIW, I use
readlines a lot to get list of lines for unit tests, for example (in
case of failure, lists make better diffs than strings).
> So my counter-proposal is to remove the readlines method but to leave the
> corresponding entry in the documentation with a a description of the "right
> way" to iterate over the lines of a file.
A doc entry for a non-existing function would be very confusing.
> Backwards compatibility be damned ;)
Not sure what the smiley means; compatibility is taken seriously, and
removing things has a very high bar.
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