# Python is Not a snake: A Beginner's Guide to Python Programming
Python is one of the most popular programming languages in the world. Named after the British comedy group Monty Python, it is known
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2023-10-07 05:31:04
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float('nan')导致Nan(不是数字)。 但我该如何检查呢？ 应该很容易，但我找不到它。有关Python中某些NaN的历史，请参阅PEP 754. python.org/dev/peps/pep-0754然后numpy.isnan(numpy.nan)将返回True。 很明显，import numpy之前这样做了。:)math.isnan(x)的Return True if x is a
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2023-07-31 17:55:21
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