Python

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

df.replace({'column_name':{'A':0,'B':1},'Sex':{'m':0,'f':1}}, inplace=True)

df.column = df.coloumn.replace('old_value', 'new_value')

df.loc[df['column'] == 'column_value', 'column'] = 'new_column_value'

# this will replace "Boston Celtics" with "Omega Warrior"
df.replace(to_replace ="Boston Celtics",
                 value ="Omega Warrior")

df.loc[df['column_name'] == value_you_want_replaced, 'column_name'] = your_value

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