auto save

diy.py

@@ -4,3 +4,17 @@
 # s.close()
 # with open(r"C:\Users\Administrator\Desktop\test.txt",'a',encoding='utf-8') as a:
 #     a.write('\n小强：10本\n李明：15本\n')
+b = ''
+with open(r"C:\Users\Administrator\Desktop\test.txt",'r',encoding='utf-8') as a:
+    for i in a:
+        if '小强：10本' in i:
+            i = i.replace('小强：10本','小强：11本')
+        if '小兰：12本' in i:
+            i = i.replace('小兰：12本','小兰：14本')
+        b+=i
+with open(r"C:\Users\Administrator\Desktop\test.txt",'w',encoding='utf-8') as a:
+    a.write(b)
+with open(r"C:\Users\Administrator\Desktop\test.txt",'r',encoding='utf-8') as a:
+    print(a.read())
+
+        
\ No newline at end of file