pandas replace nan with none code example

Example 1: replace nan in pandas

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

Example 2: how to replace nan with 0 in pandas

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

Example 3: pandas replace empty string with nan

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

Example 4: replace "-" for nan in dataframe

df.replace(np.nan,0)

Example 5: pandas where retuning NaN

# Try using a loc instead of a where:
df_sub = df.loc[df.yourcolumn == 'yourvalue']