save project

22.py

+new_data=''
 with open(r'C:\Users\Administrator\Desktop\book.txt','w',encoding='utf-8') as file:
 with open(r'C:\Users\Administrator\Desktop\book.txt','w',encoding='utf-8') as file:
     file.write('小强：10\n')
     file.write('小强：10\n')
     file.write('小王：22\n')
     file.write('小王：22\n')
@@ -5,7 +6,11 @@ with open(r'C:\Users\Administrator\Desktop\book.txt','w',encoding='utf-8') as fi
     file.write('小哥：999\n')
     file.write('小哥：999\n')
 with open(r'C:\Users\Administrator\Desktop\book.txt','r',encoding='utf-8') as file1:
 with open(r'C:\Users\Administrator\Desktop\book.txt','r',encoding='utf-8') as file1:
     for data in file1:
     for data in file1:
-        if  '小兰：19' in data:
-            print('小兰在数据中')
         if '小强：10' in data:
         if '小强：10' in data:
-            print('小强在数据中')
+            data=data.replace('小强：10','小强：11')
\ No newline at end of file
+        new_data+=data 
+with open(r'C:\Users\Administrator\Desktop\book.txt','w',encoding='utf-8') as file1:
+    file1.write(new_data)
+with open(r'C:\Users\Administrator\Desktop\book.txt','r',encoding='utf-8') as file1:
+    a=file1.read()
+    print(a)
\ No newline at end of file