diff --git a/youngjin.han/python-the-hard-way/calc.py b/youngjin.han/python-the-hard-way/calc.py
new file mode 100644
index 0000000..0094023
--- /dev/null
+++ b/youngjin.han/python-the-hard-way/calc.py
@@ -0,0 +1,45 @@
+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("Only numbers and spaces")
+
+    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)