def test_dynamic_prog(self):
"""Tests the dynamic_prog function in module invariant_python
which returns the no of iterations to reach 6174 for a given
number. It should have value 5 for number 1112
"""
no_of_iterations = dynamic_prog(1112)
self.assertEqual(no_of_iterations, 5)
def main_method(number_list):
#checking if all numbers are 4 digit numbers
if max(number_list) > 9999 or min(number_list) < 1000:
raise ValueError, "all numbers are not 4 digit numbers"
#dictionary to hold (Iterations:Total count of numbers)
iter_dict = {}
for number in number_list:
if number % 1111 != 0 and number!=6174:
no_of_iter = dynamic_prog(number)
# putting it into a dictionary
iter_dict[no_of_iter] = iter_dict.get(no_of_iter,0) + 1
# when the number is 6174 ,the no of iterations is zero
iter_dict[0] = 1
return iter_dict
