How can I call 'git pull' from within Python?

Using the github webhooks, I would like to be able to pull any changes to a remote development server. At the moment, when in the appropriate directory, git pull gets any changes that need to be made. However, I can’t figure out how to call that function from within Python. I have tried the following:

import subprocess
process = subprocess.Popen("git pull", stdout=subprocess.PIPE)
output = process.communicate()[0]

But this results in the following error

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  • 4 Solutions collect form web for “How can I call 'git pull' from within Python?”

    Have you considered using GitPython? It’s designed to handle all this nonsense for you.

    import git 
    g = git.cmd.Git(git_dir)

    subprocess.Popen expects a list of the program name and arguments. You’re passing it a single string, which is (with the default shell=False) equivalent to:

    ['git pull']

    That means that subprocess tries to find a program named literally git pull, and fails to do so: In Python 3.3, your code raises the exception FileNotFoundError: [Errno 2] No such file or directory: 'git pull'. Instead, pass in a list, like this:

    import subprocess
    process = subprocess.Popen(["git", "pull"], stdout=subprocess.PIPE)
    output = process.communicate()[0]

    By the way, in Python 2.7+, you can simplify this code with the check_output convenience function:

    import subprocess
    output = subprocess.check_output(["git", "pull"])

    Also, to use git functionality, it’s by no way necessary (albeit simple and portable) to call the git binary. Consider using git-python or Dulwich.

    This is a sample recipe, I’ve been using in one of my projects. Agreed that there are multiple ways to do this though. 🙂

    >>> import subprocess, shlex
    >>> git_cmd = 'git status'
    >>> kwargs = {}
    >>> kwargs['stdout'] = subprocess.PIPE
    >>> kwargs['stderr'] = subprocess.PIPE
    >>> proc = subprocess.Popen(shlex.split(git_cmd), **kwargs)
    >>> (stdout_str, stderr_str) = proc.communicate()
    >>> return_code = proc.wait()
    >>> print return_code
    >>> print stdout_str
    # On branch dev
    # Untracked files:
    #   (use "git add <file>..." to include in what will be committed)
    #   file1
    #   file2
    nothing added to commit but untracked files present (use "git add" to track)
    >>> print stderr_str

    The problem with your code was, you were not passing an array for subprocess.Popen() and hence was trying to run a single binary called git pull. Instead it needs to execute the binary git with the first argument being pull and so on.


    subprocess.Popen("git pull", stdout=subprocess.PIPE, shell=True)
    Git Baby is a git and github fan, let's start git clone.