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PEP-654: warn that leaf_generator recycles tracebacks #2109

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Oct 16, 2021
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PEP-654: warn that leaf_generator recycles tracebacks #2109

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PEP-654: warn that leaf_generator recycles tracebacks
iritkatriel Oct 16, 2021
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refer to the list and then its contents
iritkatriel Oct 16, 2021
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7 changes: 6 additions & 1 deletion pep-0654.rst
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Expand Up @@ -469,7 +469,12 @@ recursively, as follows:
else:
# exc is a leaf exception and its traceback
# is the concatenation of the traceback
# segments in tbs
# segments in tbs.

# Note: the list returned (tbs) is reused in each iteration
# through the generator. Make a copy if your use case holds
# on to it beyond the current iteration or mutates its contents.

yield exc, tbs
tbs.pop()

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