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backward-compatibility
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 …
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 …