auto save

diy.py

-with open(r"C:\Users\EDZ\Documents\lesson13-1\sales_list.txt","r",encoding="utf-8")as file:
-    data = file.readlines()
-    print(data)
+k = int(input("输入正整数k"))
+a = 1
+b = 1
\ No newline at end of file
+c = 0
+while (k-2) :
+    c = a
+    a = b
+    b = b + c
+    k = k- 1
+print(b)