auto save

l1.py

+file1 = open(r"C:\Users\ming\Desktop\test.txt",'r',encoding='utf-8')
+for data in file1:
+    if data == "小强：10本\n":
+        print("找到了")
+file1.close()
+
+a = "0123456789"
+index_in = int(input("请输入下标："))
+try:
+    print(a[index_in])
+except:
+    print(a[-1])
\ No newline at end of file