On Fri, Jan 3, 2014 at 11:03 PM, Sean Murphy <mhysnq1...@icloud.com> wrote:
> Hello all.
>
> This is a newly question. But I wish to understand why the below code is
> providing different results.
>
> import os, sys
>
>
> if len(sys.argv) > 2:
> filenames = sys.argv[1:]
> else
> print ("no parameters provided\n")
> sys.edit()
>
> for filename in filenames:
> print ("filename is: %s\n" %filename)
>
> The above code will return results like:
>
> filename is test.txt
>
> If I modify the above script slightly as shown below, I get a completely
> different result.
>
> if len(sys.argv) > 2:
> filenames = sys.argv[1]
> else
> print ("no parameters provided\n")
> sys.exit()
>
> for filename in filenames:
> print ("filename is: %s\n" % filename)
>
> The result is the filename is spelled out a character at a time. The bit I am
> missing is something to do with splicing or referencing in Python.
>
> Why am I getting different results? In other languages I would have got the
> whole content of the element when using the index of the array (list).
>
>
> Sean
> filename is: t
> filename
argv[1] gives just the second item in the list
argv[1:] gives a list containing the items in the list, from the
second to the end
>>> x = ['foo', 'bar', 'baz']
>>> print x[1]
bar
>>> print x[1:]
['bar', 'baz']
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