Update app.py

app.py

@@ -32,7 +32,8 @@ def DownLoad(URI:str,DownloadPath:pathlib.Path,DownLoadFileName:str ) -> int:
     else :
 
       del i
-  raise Exception(str.format("download \'{0}\' failed",URI))
+  raise Exception(str.format("download \'{0}\' failed"
+,URI))
 
 user_home =pathlib.Path.home().resolve()
 os.chdir(str(user_home))
@@ -225,4 +226,4 @@ try:
     ret = subprocess.run(args)
 except Exception as e:
     print("Error:", e)
-del os ,user_home ,pyexecutable ,subprocess
+del os ,user_home ,executable ,subprocess