import random

# get seed from a user
choice = input("Enter an integer seed (or 'r' to pick randomly): ")

# as long as the input is not all digits or "r"
# get the input again from the user
while(choice.lower() != "r" and not choice.isdigit()):
    choice= input("Invalid input. Enter an integer seed (or 'r' to pick randomly): ")

print(choice)


# The method seed() of the random module
# sets the integer starting value used in generating random numbers.
#   seed(x)
#      x -- This is the seed for the next random number.
#           If omitted, then it takes system time
#           to generate next random number.
# This method does not return any value.
# This function is not accessible directly,
# so we need to "import random" and then call the seed function through it
#   example
#     random.seed(10)
#     print("Random number with seed 10 : ", random.random())
#


# if user supplied a seed
if choice.isdigit():
    random.seed(int(choice))
    print("Random number with seed", choice, ": ", random.random())


# let's see other examples for random number
print("Random number with randrange : ", random.randrange(1, 10))
print("Random number with randint : ", random.randint(20, 30))