save project

1.py

@@ -7,9 +7,21 @@ filel1.close()
 with open(r'C:\Users\Administrator\Desktop\test.txt','a',encoding='utf-8') as file1:
     file1.write('小强:12本')
     file1.write('李明：15本')
+
 with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8') as file1:
     for data in file1:
         if '小强:12本' in data:
             print('数据在文件中')
         if '小兰：12本' in data:
             print('数据在文件中')
+new_data=''
+with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8') as file1:
+    for data in data:
+        if '小强:12本' in data:
+            data=data.replace('小强:12本','小强:11本')
+        if '小兰：12本' in data:
+            data=data.replace('小兰:12本','小兰:14本')
+        new_data+=data
+with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8') as file1：
+    file1.write(new_data)
+