Python判断Nan值的五种方法
numpy判断import numpy as npnan = float('nan')print(np.isnan(nan))TrueMath判断import mathnan = float('nan')print(math.isnan(nan))TruePandas判断import pandas as pdnan = float('nan')print(pd.isna(nan))True判断是否
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numpy判断
import numpy as np
nan = float('nan')
print(np.isnan(nan))
True
Math判断
import math
nan = float('nan')
print(math.isnan(nan))
True
Pandas判断
import pandas as pd
nan = float('nan')
print(pd.isna(nan))
True
判断是否等于自身
利用Nan值不等于其自身判断
def is_nan(nan):
return nan != nan
nan = float('nan')
print(is_nan(nan))
True
Nan不属于任何取值区间
# 只能输入数值型参数
def is_nan(nan):
return not float('-inf') < nan < float('inf')
nan = float('nan')
print(is_nan(nan))
True
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