prime number in python

Sure, here is a simple way to check if a number is prime in Python:

def is_prime(n):
    if n <= 1:
        return False
    elif n <= 3:
        return True
    elif n % 2 == 0 or n % 3 == 0:
        return False
    i = 5
    while i * i <= n:
        if n % i == 0 or n % (i + 2) == 0:
            return False
        i += 6
    return True

This function works by first checking if the number is less than or equal to 1, in which case it is not prime. It then checks if the number is less than or equal to 3, in which case it is prime. It then checks if the number is divisible by 2 or 3, in which case it is not prime. Finally, it checks if the number is divisible by any number from 5 to the square root of the number, in which case it is not prime. If none of these conditions are met, the number is prime.