Answers for "replace empty string with 0 pandas"

pandas replace empty string with nan

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

pandas replace nulls with zeros

df['col1'] = df['col1'].fillna(0)

pandas replace zero with blank

# in column_B of dataframe, replace zero with blanks
df['column_B'].replace(['0', '0.0'], '', inplace=True)