python check if value is nan code example
Example 1: check if a value in dataframe is nan
#return a subset of the dataframe where the column name value == NaN
df.loc[df['column name'].isnull() == True]
Example 2: python test is nan
math.isnan(n)
Example 3: check if something is nan python
import math
print math.isnan(float('NaN'))OutputTrue
print math.isnan(1.0)OutputFalse
Example 4: check if value is NaN
Number.isNaN(123)
Example 5: check is string is nan python
>>> pd.isnull(None)
True
Example 6: python checking if something is equal to NaN
# Test to see if it is equal to itself
def isNaN(num):
return num != num