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Python: bufsize must be an integer in subprocess.Popen

+2 votes
3,825 views

I am using the Linux system with python, i am running the following script

#!/usr/bin/python

import threading

import time

import sys
import subprocess
import datetime
import os
import time
import logging

proc1=subprocess.Popen("/root/Desktop/abc.py","64","abc",shell=True,stdout=subprocess.PIPE,
stderr=subprocess.PIPE)

In this script i am calling the other script named abc.py which is located on the desktop with 64 and abc as its arguments I am getting the following error

File "/usr/lib64/python2.6/subprocess.py", line 589, in __init__
 raise TypeError("bufsize must be an integer")
TypeError: bufsize must be an integer

Can someone help me?

posted Feb 23, 2015 by anonymous

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1 Answer

+1 vote

When shell=True, the first argument should be string passed to shell.

So you should:

proc1=subprocess.Popen("/root/Desktop/abc.py 64 abc",
 shell=True,stdout=subprocess.PIPE, stderr=subprocess.PIPE)
answer Feb 23, 2015 by Gurminder
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I was following an exercise in a book when I edited the code and came across something I did not get. Here is the relevant part of the code that works:

start=None #initialise 
while start !="": 
 start=input("nStart: ")

 if start:
 start=int(start)
 finish=int(input("Finish: ")) 

 print("word[",start,":",finish,"] is", word[start:finish])

I then changed the code to this:

start=None #initialise 
while start !="": 
 start=int(input("nStart: "))

 if start:

 finish=int(input("Finish: "))

 print("word[",start,":",finish,"] is", word[start:finish])

I combined the int conversion and the input on the same line, rather than to have two different statements. But got an error message:

Traceback (most recent call last):
 File "C:UsersFaisalDocumentspythonpizza_slicer.py", line 23, in 
 start=int(input("nStart: "))
ValueError: invalid literal for int() with base 10: ''

Could someone tell me why I got this error message?

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