sys.stdin is an iterator not a list so addressing an element in the way you are
doing it won't work, you would need to wrap sys.stdin in a list() to cause it
to read all the lines, and then address the element, for example
print ( list(sys.stdin)[1] )
would be the way to go, note that arrays are 0 based so this would get you the
second line.
If you just want the first line:
line = sys.stdin.readline()
You could use .split() to split the line, or check re.match() if you want to
use a regex as opposed to a string:
field1, field2 = line.split('\t')
would split on a tab.
F.
On Apr 28, 2013, at 7:04 PM, LuKreme <[email protected]> wrote:
>
> On 28 Apr 2013, at 15:44 , François Schiettecatte <[email protected]>
> wrote:
>
>> #!/usr/bin/python
>> import sys
>>
>> for line in sys.stdin:
>> replacement_line = "***" + line.strip()
>> print replacement_line
>
> huh, that's interesting. I tried what I thought was the simplest possible
> script:
>
> #!/usr/bin/python
> import sys
>
> print (sys.stdin[1])
>
> and it not only didn't do anything, it gave an "error 32"
>
> Yours works, but I need to look up how to split the line into two fields so I
> can operate on the first one.
>
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