section_27.py

#List comprehensions & generators

# print(list(map((lambda x: x * 2), range(1,11))))

# print([2 * x for x in range(1,11)])

# print(list(filter((lambda x: x % 2 != 0), range(1,11))))

# print([x for x in range(1,11) if x % 2 != 0])

# print([i ** 2 for i in range(50) if i % 8 == 0])

# print([x * y for x in range(1,3) for y in range(11,16)])

# print([x for x in [i * 2 for i in range(10)] if x % 8 == 0])

# in lecture exercise

# import random

# print([x for x in [random.randint(1,1001) for i in range(50)] if x % 9 == 0])

# mult_list = [[1,2,3], [4,5,6], [7,8,9]]

# print([col[1] for col in mult_list])

# print([mult_list[i][i] for i in range(len(mult_list))])

#Generator functions

def is_prime(num):
    for i in range(2, num):
        if (num % i) == 0:
            return False
        return True

def gen_primes(max_number):
    for num1 in range(2, max_number):
        if is_prime(num1):
            yield num1

prime = gen_primes(50)

print("Prime :", next(prime))
print("Prime :", next(prime))
print("Prime :", next(prime))


double = (x * 2 for x in range(10))
print("Double :", next(double))
print("Double :", next(double))

for num in double:
    print(num)