Created
February 17, 2019 13:08
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safenan.py
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| import types | |
| class SafeNaN(types.ModuleType): | |
| def __setattr__(self, attr, value): | |
| if attr == "nan": | |
| raise RuntimeError("cannot reassign 'nan'") | |
| super().__setattr__(attr, value) | |
| import sys | |
| import numpy | |
| sys.modules["numpy"].__class__ = SafeNaN | |
| numpy.nan = 1 # ERROR! |
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