auto save

diy.py

@@ -4,6 +4,11 @@ with open(r'C:\Users\admin\Desktop\test.txt','r',encoding='utf-8') as a:
 # a.write('小丽:11本\n')
 # a.write('李文:9本\n')
 # a.write('张伟:16本\n')
-    # a.write('xx:11本')
+    #a.write('xx:11本')
     # a.write('小丽:11本')
+    #print(a.read())
+    for i in a:
+        if 'xx:11本' in i:
+            print("True")
+        i.replace('xx:11本','3')
     print(a.read())
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