How to Execute Scripts in Subdirectories or Superdirectories with Subprocess?

Subprocess in Subdirectory or Superdirectory

When attempting to execute a script within a subdirectory or superdirectory using subprocess, you may encounter the error "OSError: [Errno 2] No such file or directory."

This issue arises because the code in question calls the "cd" program, which is a shell internal. To properly call "cd," you should use the command named "cd" with the "shell=True" argument:

<code class="python">subprocess.call('cd ..', shell=True) </code>

However, this code is ineffective as a process cannot change another process's working directory in UNIX-like or Windows operating systems.

Instead, you can utilize the "os.chdir()" function or the "subprocess" named parameter "cwd" to alter the working directory before executing the subprocess.

For instance, to execute "ls" in the root directory, you can use:

<code class="python">os.chdir("/")
subprocess.Popen("ls")</code>

or simply:

<code class="python">subprocess.Popen("ls", cwd="/")</code>

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