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Date: Thu, 24 Jan 2013 14:49:24 +0530
Subject: Re: Any algorithm to preserve whitespaces?
From: Santosh Kumar <sntshkmr60@gmail.com>
To: Peter Otten <__peter__@web.de>
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Xref: csiph.com comp.lang.python:37545

On 1/24/13, Peter Otten <__peter__@web.de> wrote:
> Santosh Kumar wrote:
>
>> Yes, Peter got it right.
>>
>> Now, how can I replace:
>>
>>     script, givenfile = argv
>>
>> with something better that takes argv[1] as input file as well as
>> reads input from stdin.
>>
>> By input from stdin, I mean that currently when I do `cat foo.txt |
>> capitalizr` it throws a ValueError error:
>>
>>     Traceback (most recent call last):
>>       File "/home/santosh/bin/capitalizr", line 16, in <module>
>>         script, givenfile = argv
>>     ValueError: need more than 1 value to unpack
>>
>> I want both input methods.
>
> You can use argparse and its FileType:
>
> import argparse
> import sys
>
> parser = argparse.ArgumentParser()
> parser.add_argument("infile", type=argparse.FileType("r"), nargs="?",
> default=sys.stdin)
> args = parser.parse_args()
>
> for line in args.infile:
>     print line.strip().title() # replace with your code
>

This works file when I do `script.py inputfile.txt`; capitalizes as
expected. But it work unexpected if I do `cat inputfile.txt |
script.py`; leaves the first word of each line and then capitalizes
remaining.