auto save

arhgdhdh.py

 new_data=''
 with open(r'C:\Users\Administrator\Desktop\text.txt','r',encoding='utf-8')as file1:
+    file1.write('小兰:12本'\n)
+    file1.write('小强:10本'\n)
+    file1.write('小王:9本')
+with open(r'C:\Users\Administrator\Desktop\text.txt','r',encoding='utf-8')as file1:
     for data in file1:
-        if ':10' in data:
-            data=data.replace()
-        if ':10' in data:
-            data=data.replace()
+        if '小兰:12本' in data:
+            data=data.replace('小兰:12本','小兰:14本')
+        if '小强:10本' in data:
+            data=data.replace('小强:10本','小强:11本')
         new_data+=data