I want my Python script to copy files on Vista. When I run it from a normal
cmd.exe window, no errors are generated, yet the files are NOT copied. If I run
cmd.exe "as administator" and then run my script, it works fine.
This makes sense since User Account Control (UAC) normally prevents many file system actions.
Is there a way I can, from within a Python script, invoke a UAC elevation request (those dialogs that say something like "such and such app needs admin access, is this OK?")
If that"s not possible, is there a way my script can at least detect that it is not elevated so it can fail gracefully?
As of 2017, an easy method to achieve this is the following:
import ctypes, sys def is_admin(): try: return ctypes.windll.shell32.IsUserAnAdmin() except: return False if is_admin(): # Code of your program here else: # Re-run the program with admin rights ctypes.windll.shell32.ShellExecuteW(None, "runas", sys.executable, " ".join(sys.argv), None, 1)
If you are using Python 2.x, then you should replace the last line for:
ctypes.windll.shell32.ShellExecuteW(None, u"runas", unicode(sys.executable), unicode(" ".join(sys.argv)), None, 1)
Also note that if you converted you python script into an executable file (using tools like
pyinstaller) then you should use
sys.argv[1:] instead of
sys.argv in the fourth parameter.
Some of the advantages here are:
sysfrom standard library.
Documentation for the underlying ShellExecute call is here.
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