stdin, stdout, redmon

[Bernard Desnoues]

Hello,

I checked under linux and it works :
text.txt :
"first line of the text file
second line of the text file"

test.py :
"import sys
a = sys.stdin.readlines()
x = ''.join(a)
x = x.upper()
sys.stdout.write(x)"

 >cat text.txt | python test.py

But I reinstalled Python 2.5 under Windows XP and it doesn't work 
anyway. Can you confirm that your script works with Win XP and Python 2.5 ?

Regards

Rolf van de Krol a écrit :
> I don't know what you did with your Python installation, but for me this 
> works perfectly.
> 
> test3.py contains:
> <code>
> import sys
> 
> print sys.stdin.readlines()
> </code>
> 
> test.txt contains:
> <code>
> Testline1
> Testline2
> </code>
> 
> Output of 'python test3.py < test.txt' is:
> <code>
> ['Testline1\n', 'Testline2']
> </code>
> 
> Just plain simple and just works.
> 
> Rolf
> 
> 
> 
> Bernard Desnoues wrote:
>> Rolf van de Krol a écrit :
>>  
>>> According to various tutorials this should work.
>>>
>>> <code>
>>> |import sys
>>> data = sys.stdin.readlines()
>>> print "Counted", len(data), "lines."|
>>> </code>
>>>
>>> Please use google before asking such questions. This was found with 
>>> only one search for the terms 'python read stdin'
>>>
>>> Rolf
>>>
>>> Bernard Desnoues wrote:
>>>    
>>>> Hi,
>>>>
>>>> I've got a problem with the use of Redmon (redirection port 
>>>> monitor). I intend to develop a virtual printer so that I can modify 
>>>> data sent to the printer.
>>>> Redmon send the data flow to the standard input and lauchs the 
>>>> Python program which send modified data to the standard output 
>>>> (Windows XP and Python 2.5 context).
>>>> I can manipulate the standard output.
>>>>
>>>> "import sys
>>>> sys.stdout.write(data)"
>>>>
>>>> it works.
>>>> But how to manipulate standard input so that I can store data in a 
>>>> string or in an object file ? There's no "read" method.
>>>>
>>>> "a = sys.stdin.read()" doesn't work.
>>>> "f = open(sys.stdin)" doesn't work.
>>>>
>>>> I don't find anything in the documentation. How to do that ?
>>>> Thanks in advance.
>>>>
>>>> Bernard Desnoues
>>>> Librarian
>>>> Bibliothèque de géographie - Sorbonne
>>>>       
>>
>> Hello Rolf,
>>
>> I know this code because I have search a solution !
>> Your google code doesn't work ! No attribute "readlines".
>>
>>  >>> import sys
>>  >>> data = sys.stdin.readlines()
>>
>> Traceback (most recent call last):
>>    File "<pyshell#1>", line 1, in <module>
>>      data = sys.stdin.readlines()
>> AttributeError: readlines