如何在python脚本中调用cmd文件

Question

This is the python script will do. The question is how to call the external cmd file within the function?

• Read a CSV file in the directory.
• If the content in 6th column is equal to 'approved', then calls an external windows script 'TransferProd.cmd'

.

def readCSV(x):
    #csvContents is a list in the global scope that will contain lists of the  
    #items on each line of the specified CSV file
    try:
        global csvContents
        file = open(csvDir + x + '.csv', 'r')      #Opens the CSV file
        csvContents = file.read().splitlines()     #Appends each line of the CSV file to csvContents
        #----------------------------------------------------------------------
        #This takes each item in csvContents and splits it at "," into a list.
        #The list created replaces the item in csvContents
        for y in range(0,len(csvContents)):
            csvContents[y] = csvContents[y].lower().split(',')
        if csvContents[y][6] == 'approved':
            ***CALL TransferProd.cmd***
            file.close()
        return
    except Exception as error:
        log(logFile, 'An error has occurred in the readCSV function: ' + str(error))
        raise

Answer 1

Take a look at the subprocess module .

import subprocess
p = subprocess.Popen(['TransferProd.cmd'])

You can specify where you want output/errors to go (directly to a file or to a file-like object), pipe in input, etc.

Answer 2

import os
os.system('TransferProd.cmd')

This works in both unix/windows flavors as it send the commands to the shell. There are some variations in returned values though! Check here .

Answer 3

1. If you don't need output of the command you could use: os.system(cmd)

2. The better solution is to use:

    from subprocess import Popen, PIPE proc = Popen(cmd, shell = True, close_fds = True) stdout, stderr = proc.communicate()