ungleich-learning-circle/youngjin.han/python-the-hard-way/calc.py

import sys

a_py_file, a_calc_file = sys.argv

def input_and_calculate_one_line():
    l_input_array = list()
    l_s_result = ""
    l_input_string_num = 0
    l_input_string = input("""Only numbers and spaces are allowed.
'q' is exit.
 > """).split()

    if "q" != l_input_string[0] or 1 != len(l_input_string):
        try:
            for i in l_input_string:
                l_input_string_num += 1
                l_input_array.append(int(i))

                if l_input_string_num != len(l_input_string):
                    l_s_result += f"{i} + "
                else:
                    l_s_result += f"{i} = "

            l_result = sum(l_input_array)
            l_s_result += f"{l_result}"
        except:
            l_s_result = f"input error : input string = {l_input_string}"
            print(l_s_result)

    return l_s_result

def editor(p_calc_file):
    l_calc_result = open(p_calc_file, 'w')
    l_calc_result.write("")
    l_calc_result.close()
    while True:
        l_s_result = input_and_calculate_one_line()
        if "" != l_s_result:
            l_calc_result = open(p_calc_file, 'a')
            l_calc_result.write(f"""{l_s_result}\n""")
            l_calc_result.close()
        else:
            exit(0)

editor(a_calc_file)