How Can I Capture and Display a Full Stack Trace in Python Without Terminating the Program?

Catching Exceptions to Traceback

When encountering exceptions during Python execution, there may be a need to capture and log them without abruptly terminating the program. To achieve this, a try/except block can be employed, where specific exceptions can be handled gracefully.

However, in certain scenarios, it is desirable to display the entire stack trace associated with the exception, just as if the exception had been raised without the intercepting try/except block. This provides valuable insights into the specific cause and location of the error.

To obtain a comprehensive traceback, the traceback.format_exc() method can be leveraged. Here's an example:

import traceback

def do_stuff():
    raise Exception("test exception")

try:
    do_stuff()
except Exception:
    print(traceback.format_exc())

This code snippet will produce the following output, mimicking the default exception stack trace:

Traceback (most recent call last):
  File "main.py", line 9, in <module>
    do_stuff()
  File "main.py", line 5, in do_stuff
    raise Exception("test exception")
Exception: test exception

By utilizing the traceback.format_exc() method, the entire traceback is captured and printed, providing a detailed record of the exception's occurrence. This information can be invaluable for debugging and understanding the root cause of errors without disrupting the program's execution.

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