otp.Operation.str.lower# lower()# Convert a string to lower case. Returns Lowercased string Return type Operation Examples >>> data = otp.Ticks(X=['HeLlO', 'wOrLd!']) >>> data['LOW'] = data['X'].str.lower() >>> otp.run(data) Time X LOW 0 2003-12-01 00:00:00.000 HeLlO hello 1 2003-12-01 00:00:00.001 wOrLd! world!