Python和子过程

Question

这是为我正在研究的脚本。它应该运行以下循环的.exe文件。 （顺便说一下，不确定它是否可见，而是对EL（'90'，'52.6223'，...）在循环外部，其余的嵌套环在循环之外），我不确定订购是否正确或没有什么。同样，当.exe文件运行时，它会吐出一些内容，我需要在屏幕上打印一条一行（因此，您可以看到Aspecificlinfe = ...）。任何有用的答案都很棒！

for el in ('90.','52.62263.','26.5651.','10.8123.'):

    if el == '90.':
        z = ('0.')
    elif el == '52.62263.':
        z = ('0.', '72.', '144.', '216.', '288.')
    elif el == '26.5651':
        z = ('324.', '36.', '108.', '180.', '252.')
    else el == '10.8123':
        z = ('288.', '0.', '72.', '144.', '216.')

        for az in z:

            comstring = os.path.join('Path where .exe file is')
            comstring = os.path.normpath(comstring) 
            comstring = '"' + comstring + '"'

            comstringfull = comstring + ' -el ' + str(el) + ' -n ' + str(z)

            print 'The python program is running this command with the shell:'
            print comstring + '\n'

            process = Popen(comstring,shell=True,stderr=STDOUT,stdout=PIPE)
            outputstring = myprocesscommunicate()

            print 'The command shell returned the following back to python:'
            print outputstring[0]

                AspecificLine=linecache.getline(' ??filename??   ',     # ??
                sys.stderr.write('az', 'el', 'AREA' )           # ??

Answer 1

使用 shell=True 是错误的，因为那不必要的刺激了壳。

相反，这样做：

for el in ('90.','52.62263.','26.5651.','10.8123.'):
    if el == '90.':
        z = ('0.')
    elif el == '52.62263.':
        z = ('0.', '72.', '144.', '216.', '288.')
    elif el == '26.5651':
        z = ('324.', '36.', '108.', '180.', '252.')
    else el == '10.8123':
        z = ('288.', '0.', '72.', '144.', '216.')

    for az in z:

        exepath = os.path.join('Path where .exe file is')
        exepath = os.path.normpath(comstring) 
        cmd = [exepath, '-el', str(el), '-n', str(z)]

        print 'The python program is running this command:'
        print cmd

        process = Popen(cmd, stderr=STDOUT, stdout=PIPE)
        outputstring = process.communicate()[0]

        print 'The command returned the following back to python:'
        print outputstring
        outputlist = outputstring.splitlines()
        AspecificLine = outputlist[22]   # get some specific line. 23?
        print AspecificLine