replace nan with mode of column pandas code example

Example 1: replace nan in pandas

df['DataFrame Column'] = df['DataFrame Column'].fillna(0)

Example 2: pandas replace empty string with nan

df = df.replace(r'^\s*$', np.NaN, regex=True)

Example 3: fill na with mode and mean python

cateogry_columns=df.select_dtypes(include=['object']).columns.tolist()
integer_columns=df.select_dtypes(include=['int64','float64']).columns.tolist()

for column in df:
    if df[column].isnull().any():
        if(column in cateogry_columns):
            df[column]=df[column].fillna(df[column].mode()[0])
        else:
            df[column]=df[column].fillna(df[column].mean)

Example 4: python fillna with mode

data['Native Country'] = data['Native Country'].fillna(data['Native Country'].mode()[0])