仅在CMD运行simaref.py时报NameError: name 'runfile' is not defined

What's Going On Here #

Let's break down your scenario first:

• You have two scripts:
  • sima.py:

    import pyautogui as py; py.alert("Foo")
    

  • simaref.py:

    runfile('E:/Anyagok/Programozas/Python/projekts/gyak/Pyautogui/sima.py', wdir='E:/Anyagok/Programozas/Python/projekts/gyak/Pyautogui')
    

• Both work fine in Spyder, and sima.py runs without issues when you execute it directly via CMD with:

  python.exe E:\Anyagok\Programozas\Python\projekts\gyak\Pyautogui\sima.py
  

• But running simaref.py via CMD throws the NameError: name 'runfile' is not defined error.

The Root Cause #

runfile() is a Spyder-specific built-in function — it's not part of the standard Python library, and it doesn't exist in a regular Python interpreter session (like the one you get in CMD). Spyder provides this function to make it easy to run scripts within its IDE environment, but it won't work outside of Spyder's context.

Solutions to Make It Work in CMD #

You have a few options to replace runfile() with standard Python functionality:

Option 1: Import the Script Directly

If sima.py is structured to be importable (which it is, since it just runs code top-level), you can add its directory to your Python path and import it:

import sys
# Add the script's directory to Python's module search path
sys.path.append('E:/Anyagok/Programozas/Python/projekts/gyak/Pyautogui')
# Importing sima will execute all the top-level code in it
import sima

Option 2: Use subprocess to Run the Script as a Separate Process

This replicates the exact behavior of running sima.py directly in CMD, and works across all Python environments:

import subprocess
import sys

# Build the command: use the current Python interpreter + path to sima.py
command = [sys.executable, 'E:/Anyagok/Programozas/Python/projekts/gyak/Pyautogui/sima.py']
# Run the command, setting the working directory as you did with runfile
subprocess.run(command, cwd='E:/Anyagok/Programozas/Python/projekts/gyak/Pyautogui')

Option 3: Make the Script Compatible with Both Spyder and CMD

If you want the script to work in both environments without changes, add a try-except block to handle both cases:

try:
    # Try Spyder's runfile first
    runfile('E:/Anyagok/Programozas/Python/projekts/gyak/Pyautogui/sima.py', wdir='E:/Anyagok/Programozas/Python/projekts/gyak/Pyautogui')
except NameError:
    # Fall back to subprocess if runfile isn't available
    import subprocess
    import sys
    command = [sys.executable, 'E:/Anyagok/Programozas/Python/projekts/gyak/Pyautogui/sima.py']
    subprocess.run(command, cwd='E:/Anyagok/Programozas/Python/projekts/gyak/Pyautogui')

内容的提问来源于stack exchange，提问作者Chris