在Windows上安装Python x64之后，无法从资源管理器启动脚本

Question

I needed to install Python 3.6.1 x64 for a project on windows. I uninstalled 3.6.1 x86 and installed 3.6.1 x64. I made sure that my PATH env var is pointing to the new install. I then associated py files with the correct python.exe: C:\\Program Files\\Python36\\python.exe instead of: C:\\Program Files (x86)\\Python36-32\\python.exe

I can run a script directly from a cmd window by calling python no problem: python myscript.py

but if I double click it displays a cmd windows bot nothing in it.

If I "Open with" it won't load, just giving me the waiting cursor for a couple of seconds. Even after I browsed for the new python.exe

What am I missing here?

Everything was working fine for Python x86

Thanks!

Answer 1

Le sigh, two issues happening. Something was borked with the Python install somewhere, a complete uninstall and reinstall of 3.6.1 x64 fixed that for general python execution.

Secondly, I'm using Pywinauto which is why I need x64 to access x64 app's UI. Apparently it also needs elevated user rights ie admin. So if I double click a script it just hangs with no feedback, errors etc because the launcher isn't run with admin rights.

I didn't catch this because I was always executing python manually from an elevated cmd window. If I find a way to always execute the launcher as admin I'll update here.

UPDATE: Here's an in depth thread on getting Python to elevate execution privileges on Windows: How to run python script with elevated privilege on windows

It was far easier for me to write a Powershell script to do this job:

# ========================================= Admin Rights =======================================================
function asAdmin
{
    [string]$cmdPath = $args[0]
    if (!([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")) { Start-Process powershell.exe "-NoProfile -ExecutionPolicy Bypass -File `"$cmdPath`"" -Verb RunAs; exit }
}

asAdmin $PSCommandPath

Start-Process "pythonw" "$PSScriptRoot\myPythonScriptWithUI.pyw"