Answers for "replace strings to nan python\"

python convert nan to empty string

# Option 1
df1 = df.replace(np.nan, '', regex=True) # All data frame

# Option 2
df[['column1','column2']] = df[['column1','column2']].fillna('') # Specific columns

how to replace nan with 0 in pandas

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