[issue38946] IDLE on macOS 10.15 Catalina does not open double-clicked files if app already launched

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

By design, IDLE should only allow one editor instance per file for a given python-IDLE process.  "$ python3 fails.py" opens a new python-IDLE process, independent of existing processes. It is possible that double-clicking good.py multiple times opens a new IDLE process each time, without a new Shell.  You could check the process list in Terminal. (I have forgotten the unix command and barely know bash.)

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38946>
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