Test Pythona jest nan
math.isnan(n)
Famous Flatworm
math.isnan(n)# Test to see if it is equal to itself
def isNaN(num):
return num != numimport math
print math.isnan(float('NaN'))OutputTrue
print math.isnan(1.0)OutputFalse
>>> pd.isnull(None)
True
import pandas as pd
pd.isnull(df.columnName).sum()
pd.notnull(df.columnName).sum()math.isnan(x)