save project

X.py

@@ -2,15 +2,22 @@
 
 
 
 
 
 
-with open(r"C:\Users\jfm\Desktop\test.txt","a",encoding='utf-8') as file1:
-    file1.write('淘气:20本\n')
-
-
-
+with open(r"C:\Users\jfm\Desktop\test.txt","r",encoding='utf-8') as file1:
+   for data in:
+       if'小强:10本'in data
+        print('数据在文件中')
    
    
     
     
 
 
 
 
+new_data=""
+with open(r'C:\Users\CM\Desktop\test.txt','r',encoding='utf-8') as file1:
+    for data in file1:
+        if '小强：10本' in data:
+            data=data.replace('小强：10本','小强：11本')
+        new_data += data
+with open(r'C:\Users\CM\Desktop\test.txt','w',encoding='utf-8') as file1:
+    file1.write(new_data)