save project

diy1.py

-with open(r"C:\Users\2hao\Desktop\新建文件夹\chen.txt","w",encoding="utf-8")as file1:
+with open(r"C:\Users\2hao\Desktop\新建文件夹\chen.txt","r"encoding="utf-8")as file1:
     for data in file1:
         if 'h:19' in data:
-            print('数据在文件中')
-data.replace('h:19','h:20')
\ No newline at end of file
+            
+        data=data.replace('h:19','h:20')
+    new_data +=data
+with open(r'C:\Users\2hao\Desktop\chen.txt','r'encoding="utf-8") as file1:
+    file1.write(new_data)
\ No newline at end of file