validate.py: Replace deprecated time.clock() calls #251
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Applicable Issues
Fixes #250
Description of the Change
time.clock() is deprecated and removed in Python 3.8. It was replaced by time.process_time() and time.perf_counter() in Python 3.3. Replace the calls in examples/validate.py with time.perf_counter(). This drops support for Python 2 so the shebang is adjusted (not that the shebang is very useful for this non-executable file).
This also fixes what probably was an unintentional buglet; on Linux time.clock() returned the elapsed CPU time but on Windows it returned the elapsed time. Since the number was seemingly used to report the validation progress every five seconds the behavior was only correct on Windows.
Alternate Designs
We could've used time.time() given the low resolution requirement and the fact that we don't really care that that call returns a non-monotonous clock. That would've kept Python 2 compatibility, but Python 2 was EOLed almost a year ago so it's reasonable to drop support for it.
Benefits
The script will work with Python 3.8.
Possible Drawbacks
The script won't work with Python 2.x.
Sign-off
Developer's Certificate of Origin 1.1
By making a contribution to this project, I certify that:
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(c) The contribution was provided directly to me by some other person who certified (a), (b) or (c) and I have not modified it.
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Signed-off-by: Magnus Bäck <magnus.back@axis.com>