save project

a.py

+new_data=''
 with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8') as file1:
     for data in file1:
         if'小强:10本'in data:
-            print('小强在文件中')
+            data=data.replace('小强:10本','小强:11本')
         if'小兰:12本'in data:
-            print('小兰在文件中')
\ No newline at end of file
+            data=data.replace('小兰:12本','小兰:14本')
+        new_data+=data
+
+with open(r'C:\Users\Administrator\Desktop\test.txt','w',encoding='utf-8') as file1:
+    file1.write(new_data)
+
+with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8') as file1:
+    a=file1.read()
+    print(a)
\ No newline at end of file