save project

diy.py

@@ -7,4 +7,13 @@
 #     file1.write("张伟:16\n")
 with open(r'C:\Users\makcoo\Desktop\text.txt','a',encoding='utf-8')as file1:    
     file1.write("小强:12\n")
-    file1.write("李明:15\n")
\ No newline at end of file
+    file1.write("李明:15\n")
+with open(r'C:\Users\makcoo\Desktop\text.txt','r',encoding='utf-8')as file1:
+    a = file1.read()
+    for data in a:
+        print(data)
+        if data == "小强:12\n":
+            print(data)
+            data.replace("小强:12\n"("李明:15\n"))
+with open(r'C:\Users\makcoo\Desktop\text.txt','r',encoding='utf-8')as file1:
+    file1.write(new_data)
\ No newline at end of file