Tag: backward-compatibility - Articles:

Displaying chained exceptions stacktraces in Python 2

At work we have a component not yet migrated to Python 3, and we recently had some difficulties diagnosing a problem with the MySQL connector. Because we were catching the mysql.connector.errors.Error and raising a custom exception, we were loosing the underlying stacktrace and hence couldn't troubleshoot the …

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Python 3 non consistent set & dict iteration gotcha

Consider the following Python expression: print("".join(set("ABCDE"))) What do you think it produces ? Not necessarily "ABCDE". Right, but you would expect the result to be consistent, isn't it ? $ for i in {1..3}; do python2.7 -c 'print("".join(set("ABCDE")))'; done ACBED ACBED ACBED Great ! ... But with …

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