df = pd.DataFrame({'Price':[1, 1.2, 1.6, 2.4, 3.5]}) if df['Price'].all() < 10: df['Price'] = df['Price'] * 10 print(df) #output # # Price #0 10.0 #1 12.0 #2 16.0 #3 24.0 #4 35.0