save project

diy.py

+
+with open(r'c:\Users\Bellcode\Desktop\test.txt','r',encoding='utf-8')as file:
+    new_data=''
+    for data in file:
+        if "9" in data:
+            data.replace("9","8")
+        new_data+=data
+with open(r'c:\Users\Bellcode\Desktop\test.txt','w',encoding='utf-8')as file:
+    file.write(new_data)
\ No newline at end of file