[Python] How to open a file with xdg-open in a python script? (wrong application used)

I am trying to open a file on an Ubuntu machine from within Python script. However, xdg-open will always use another application (the wrong one) when started from the python script, while it will use the correct one when started from the shell.

I tried with the following commands:

subprocess.Popen([f"xdg-open {file_path}"])
subprocess.Popen([f"xdg-open {file_path}"], user="user", env=os.environ, shell=True)


Any idea, what to do?

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