How to Redirect Output to a File Using Subprocess in Python?

Redirecting Output with Subprocess in Python

To redirect output to a file using subprocess, utilize the stdout argument to specify the file handle.

import subprocess

# Specify the input files and command
input_files = ['file1', 'file2', 'file3']
command = ['cat'] + input_files

# Create a file handle for the output file
with open('myfile', "w") as outfile:
    # Redirect output to the file handle
    subprocess.run(command, stdout=outfile)

In Python 3.5 and later, this approach is preferred over using subprocess.call with the args argument converted from a string using shlex.split. This ensures that the output is properly redirected to the file.

Note that using an external command like cat is unnecessary in this case, as the same functionality can be achieved directly in Python.

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