auto save

diy.py

@@ -4,6 +4,13 @@
 #q.write('小丽：11本\n')
 #q.write('李文：9本\n')
 #q.write('张伟：16本\n')
-with open(r"C:\Users\Admin\Desktop\book.txt",'a',encoding='utf-8') as q:
-    q.write('小强：12本\n')
-    q.write('李明：15本\n')    
\ No newline at end of file
+#with open(r"C:\Users\Admin\Desktop\book.txt",'a',encoding='utf-8') as q:
+#    q.write('小强：10本\n')
+#    q.write('李明：15本\n')  
+with open(r"C:\Users\Admin\Desktop\book.txt",'r',encoding='utf-8') as q: 
+    for i in q:
+        if '小强：10本' in q:
+            print(i) 
+    for e in q:
+        if '小兰：12本' in q:
+            print(e)       
\ No newline at end of file

q.py

-#q=open(r"C:\Users\Admin\Desktop\test.txt",'w',encoding='utf-8')
-#q.write("小兰：12本")
-with open(r"C:\Users\Admin\Desktop\test.txt",'r',encoding='utf-8') as q:
-    w=q.read()
-    print(w)
-    
\ No newline at end of file
+q=open(r"C:\Users\Admin\Desktop\test.txt",'w',encoding='utf-8')
+q.write("小兰：12本")
\ No newline at end of file