Python3 os.popen () method

os.popen () method is used to open a pipe from a command.

Valid in Unix, Windows in

popen () method syntax is as follows:

os.popen(command[, mode[, bufsize]])

command - command.
mode - mode privileges can be 'r' (default) or 'w'.
bufsize - indicates the buffer size required files: 0 means unbuffered; 1 means line buffered; other positive value indicates a buffer size parameter (presumably value, in bytes).The default value is negative bufsize means to use the system, in general, for the tty device, which is the line buffer; the other files, it is fully buffered. If you do not change the parameters, the default values using the system.

It returns a file descriptor number of open file object fd

The following example demonstrates popen () methods of use:

#!/usr/bin/python3

import os, sys

# 使用 mkdir 命令
a = 'mkdir nwdir'

b = os.popen(a,'r',1)

print (b)

The above program output is:

open file 'mkdir nwdir', mode 'r' at 0x81614d0

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