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Editorial Team
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Asked: 2026-05-15T02:58:16+00:00

With either subprocess.call or subprocess.Popen , executing a shell command makes a shell window

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With either subprocess.call or subprocess.Popen, executing a shell command makes a shell window quicky appear and disappear.

How can I run the shell command without the shell window?

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1 Answer

  1. Editorial Team

    I imagine your observation is limited to Windows, since that, I believe, is the only platform on which you’ll get that “console flash” issue. If so, then the docs offer the following semi-helpful paragraph:

    The startupinfo and creationflags, if
    given, will be passed to the
    underlying CreateProcess() function.
    They can specify things such as
    appearance of the main window and
    priority for the new process. (Windows
    only)

    Unfortunately the Python online docs do not reproduce the relevant portion of the Windows API docs, so you have to locate those elsewhere, e.g. starting here on MSDN which leads you here for the creationflags, and specifically to

    CREATE_NO_WINDOW
0x08000000

    The process is a console application
    that is being run without a console
    window. Therefore, the console handle
    for the application is not set.

    So, adding creationflags=0x08000000 to your Popen call should help (unfortunately I have no Windows-running machine on which to try this out, so you’ll have to try it yourself).

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