One-time Passwords (OTP) is a password that is valid for only one login session or transaction in a computer or a digital device. Now a days OTP’s are used in almost every service like Internet Banking, online transactions etc. They are generally combination of 4 or 6 numeric digits or a 6-digit alphanumeric.
random() function can be used to generate random OTP which is predefined in random library. Let’s see how to generate OTP using Python.
random.random(): This function returns any random number between 0 to 1.
math.floor(): It returns floor of any floating number to a integer value.
Using the above function pick random index of string array which contains all the possible candidates of a particular digit of the OTP.
Example #1 : Generate 4 digit Numeric OTP
OTP of 4 digits: 3211
Example #2: Generate alphanumeric OTP of length 6
OTP of length 6: pyelJl
Example #3: Using String constants
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