Python App: When it crashes, is there a way to see any program output?

[StephenG1CMZ]

With main.py containing a print and zsys.py containing my zsys program: It tries to execute zsys and crashes.

With zsys deleted and that loop in main.py:
The loop is seen OK.

With zsys in main.py, prefixing the code with a print and input:
The program crashes before executing the print and input.

Conclusion: Something about beginning to execute zsys (and many others) causes an immediate crash...