replace nan with average pandas code example

Example 1: how to replace nan with 0 in pandas

df['product']=df['product'].fillna(0)
df['context']=df['context'].fillna(0)
df

Example 2: pandas replace nan

data["Gender"].fillna("No Gender", inplace = True)

Example 3: replace "-" for nan in dataframe

df.replace(np.nan,0)