pandas replace nan with the row above 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: replace nan in pandas

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

Example 3: pandas replace nan

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