pandas replace np.nan with string code example

Example 1: 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

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: python pandas replace nan with null

df.fillna('', inplace=True)