how to read list from file
Harvey Greenberg
hjgreenberg at gmail.com
Sun Oct 6 12:41:33 EDT 2013
On Saturday, October 5, 2013 7:24:39 PM UTC-6, Tim Chase wrote:
> On 2013-10-05 18:08, Harvey Greenberg wrote:
>
> > I am looping as for L in file.readlines(), where file is csv.
>
> >
>
> > L is a list of 3 items, eg, [{'a':1, 'b':2}, [1,2,3], 10] Note that
>
> > the first item is a dir and 2nd is a list, so parsing with split
>
> > doesn't work. Is there a way to convert L, which is a string, to
>
> > the list of 3 items I want?
>
>
>
> sounds like you want ast.literal_eval():
>
>
>
> Python 2.7.3 (default, Jan 2 2013, 13:56:14)
>
> [GCC 4.7.2] on linux2
>
> Type "help", "copyright", "credits" or "license" for more
>
> information.
>
> >>> s = "[{'a':1, 'b':2}, [1,2,3], 10]"
>
> >>> import ast
>
> >>> print repr(ast.literal_eval(s))
>
> [{'a': 1, 'b': 2}, [1, 2, 3], 10]
>
>
>
> -tkc
that didn't work. printing it looks like the list because it's the input, but try printing len(repr(ast.literal_eval(s))). It should give 3, but it gives 72 (number of chars).
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