fill na dataframe code example
Example 1: pandas replace nan
data["Gender"].fillna("No Gender", inplace = True)
Example 2: dataframe fillna with 0
df['column'] = df['column'].fillna(0)
Example 3: replace nan using fillna
>>> df.fillna(0)
A B C D
0 0.0 2.0 0.0 0
1 3.0 4.0 0.0 1
2 0.0 0.0 0.0 5
3 0.0 3.0 0.0 4
Example 4: replace nan using fillna
>>> df.fillna(method='ffill')
A B C D
0 NaN 2.0 NaN 0
1 3.0 4.0 NaN 1
2 3.0 4.0 NaN 5
3 3.0 3.0 NaN 4