
def function():
    print('test')
    return 'value'


def second_with_args(msg="msg :") :
    num = input("input_number: ")
    if num:
     try:
         num = input(msg)
         return float(num)
     except:
      return None

if __name__ == "__main__":
    while True:
     print('Start')

    num_1 = function_input()
    if not num_1:
     continue

    print(a)
    num_2 = function_input()
     break
