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Python program to design a biased coin flip function

An example of random.choice() in Python: Here, we are going to learn how to design a function that can be used as biased coin flip and the function will return a random value of biased coin flip?
Submitted by Anuj Singh, on August 01, 2019

Here, we are going to build a biasedcoin() function using python. The program is so simple as an introductory program and similar to the function coin() for defining a biased coin flip. The function is going to use an inbuilt library naming random. This random python library helps us to choose a random value of the variable within the range or take some random value from a given set.

    random.choice(['H','T','H'])

The above function will choose a random value with a probability of:

    COIN FLIP =  PROBABILITY OF OCCURRENCE
    -    HEAD = 0.67
    -    TAIL = 0.34

Each member of the set have equal probability to get fired when random.choice() function is called and if a member is present multiple times in the set, its probability increases as well.

Here is the code

import random

# function to return the randon value 
# on biased biased coin FLIP
def biasedcoin():
    return random.choice(['H','T','H'])

# main code i.e. function calling
print('COIN FLIP : ', biasedcoin())
print('COIN FLIP : ', biasedcoin())
print('COIN FLIP : ', biasedcoin())
print('COIN FLIP : ', biasedcoin())
print('COIN FLIP : ', biasedcoin())

Output

COIN FLIP :  H
COIN FLIP :  T
COIN FLIP :  H
COIN FLIP :  H
COIN FLIP :  H

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