import pandas as pd import numpy as np import math # For single variable all three libraries return single boolean x1 = float("nan") ... ... <看更多>

Python 中可以用如下方式表示正负无穷：. float("inf") # 正无穷float("-inf") # 负无穷. 利用inf(infinite) 乘以0 会得到 not-a-number(NaN) 。 ... <看更多>

__array__()) print(np.isnan(a).__array__()) [nan] [False] This bug only happens with the CPU-only build of JAX, when I... ... <看更多>

However, in python, pandas is built on top of numpy, which has neither na nor null values. ... To detect NaN values numpy uses np.isnan() . ... <看更多>