save project

diy.py

+new_data=""
+with open(r'C:\Users\刘翔\Desktop\test.txt.txt','r')as file1: 
+    for data in file1:
+        if "333"in data:
+            data=data.replace("333","444")
+        new_data+=data
+with open(r'C:\Users\刘翔\Desktop\test.txt.txt','w')as file1:
+    file1.write(new_data)
+
+                        
+        
+        
+            
+