Why is dictionary length not 20?

[Mark17]

Hi all,

Here's some code:

test_keys = []

for i in range(0,20):
    n = random.randint(1,20)
    test_keys.append(n)
#print(randomlist)

numbers = range(0,20)
#test_values = [number for number in numbers]
test_values = []
for j in numbers:
    m = random.randint(1,20)
    test_values.append(m)
new_dict = {test_keys[k]: test_values[k] for k in range(len(test_keys))}

print(f'Dictionary has been compliled with length {len(new_dict)}.')
print(f'Length of test_keys is {len(test_keys)}')
print(f'Length of test_values is {len(test_values)}')
print(f'test_values is:{test_values}')
print(f'test_keys is:{test_keys}')
print(new_dict)

If I run this several times, len(new_dict) changes and it's never 20 as I would expect.

What did I do wrong?

Thanks,
Mark