def most_common_passwords(n):
try:
results = PersonService.most_common('passwords', n)
for r in results:
print("{}, {}".format(r.login_password, r.occur))
except OperationalError:
print('Database is empty please download some persons first')
def test_n_rows_returned_when_most_common_called_with_arg_passwords_n():
n = 5
res = PersonService.most_common('passwords', n)
res = list(r for r in res)
assert len(res) == n