Several ways that Python executes shell directives

1.os.system ()

Advantages: Simple, linux&widnows and other platforms are available, just to determine whether the return result is 0 or 1 to determine if the execution is successful.

Disadvantage: Unable to get return output.

Example:

Os.system (' ls ')

2.os.popen ()

Pros: can get output results

Disadvantage: Unable to get execution result, need to make judgment processing according to output result

Example:

Output = Os.popen (' ls ') print output.read ()

3.commands.getstatusoutput ()

Pros: Can simultaneously get execution results and return results

Cons: Windows platform does not support

Example:

Status, Output = Commands.getstatusoutput (' dir ') print status, output

4.subprocess. Popen ()

Advantage: can get execution result and return result simultaneously, support Linux&windows platform

Example:

p = subprocess. Popen (cmd, shell=true, stdin=subprocess. PIPE, Stdout=subprocess. PIPE, Stderr=subprocess. PIPE) msg = "For line in P.stdout.readlines ():    msg + = Linestatus = p.wait () output = msg

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Several ways that Python executes shell directives