Answers for "python pandas replace all values instead of on in column"

replace column values pandas

df['column'] = df['column'].str.replace(',','-')
df

pandas replace null values with values from another column

#Python
#Col 1 = where you want the values replaced
#Col 2 = where you want to take the values from
df["Col 1"].fillna(df["Col 2"], inplace=True)