check Python version with sys.version_info #227
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sys.version_info is a parsed tuple of numbers, so not vulnerable to incorrect string version comparison (e.g. '10' < '3') Discovered because prometheus-client cannot be imported on development versions of Python which have version strings like `'3.7.0a0'`
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sys.version_info is a parsed tuple of numbers, so not vulnerable to incorrect string version comparison (e.g. '10' < '3') or parse errors on sys.version.
Discovered because prometheus-client cannot be imported on development versions of Python which have version strings like
3.7.0a0.