How to read space separated file in python?
gagsl-py2 at yahoo.com.ar
Fri Nov 21 20:37:56 CET 2008
En Fri, 21 Nov 2008 14:13:23 -0200, Joe Strout <joe at strout.net> escribió:
> Right -- so using split() gives you the wrong answer for two different
> reasons. Try these:
> >>> line = "1 x"
> >>> a, b = line.split() # b == "x", which is correct
> >>> line = "2 "
> >>> a, b = line.split() # correct answer would be b == " "
> ValueError: need more than 1 value to unpack
> >>> line = "3 x and here is some extra stuff"
> >>> a, b = line.split() # correct answer would be b == "x and here is
> some extra stuff"
> ValueError: too many values to unpack
> Partition handles these cases correctly (at least, within the OP's
> specification that the value of "b" should be whatever comes after the
> first space).
split takes an additional argument too:
py> line = "3 x and here is some extra stuff"
py> a, b = line.split(None, 1)
'x and here is some extra stuff'
But it still fails if the line contains no spaces. partition is more
robust in those cases
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