PyCharm debugging with separate console

In PyCharm, debugging a Python script puts its I/O in the PyCharm console. Unfortunately, it is not a complete console, so if your script uses advanced I/O features, such as waiting for key presses or colored output, it will not work correctly.

In order to have it work, you need to run the script in a separate console window, and connect to the PyCharm debugger. This is done as follows.

First of all, create an external tool which will run the script in a dedicated console.

Name: gnome-terminal-<myprogram>
Program: gnome-terminal
Arguments: — /bin/bash -c “sleep 2; venv/bin/python3 pycharm; sleep 2”
Working Directory: $ProjectFileDir$

This runs <myprogram> with the Python executable in the venv/bin environment, in a dedicated gnome-terminal.

Then, create a new Run/debug configuration “Python Debug Server”.
Name: Remote <myprogram>
IDE host name: localhost
Port: 45257
Before launch: Add New Task -> Run external tool “gnome-terminal-<myprogram>”

At the end, in the program code add the following:

try:
    if sys.argv[1] == "pycharm":
        # force keeping the original stdin.
        original_stdin = sys.stdin
        import pydevd_pycharm
        pydevd_pycharm.settrace('localhost', port=45257, suspend=False, trace_only_current_thread=False)
        sys.stdin = original_stdin
        sys.argv = sys.argv[0:1] + sys.argv[2:]
except IndexError:
    pass

If the first argument passed to the program is “pycharm”, it will be erased and the program will connect to the debug server started by the debug configuration.

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