Python函数缺少参数——为何IDE未检测出该错误？

Great question—this absolutely should trigger an error or warning in both IDEs, so it's definitely unexpected behavior. Let's break down why this might be happening and how to fix it for each tool:

VS Code Fixes #

VS Code relies on static code analysis tools (linters) to catch these kinds of argument mismatches. Here's how to get it working:

• First, make sure you have the official Python extension installed (it's usually included by default, but double-check if you've disabled it).
• Enable linting and pick a robust linter:
  1. Open VS Code settings (Ctrl+, or Cmd+, on Mac)
  2. Search for Python Linting: Enabled and check the box
  3. Enable a linter like pylint or pyright:
     • For pylint: Search for Python Linting: Pylint Enabled and check it, then run pip install pylint in your Python environment to install it.
     • For pyright (Microsoft's stricter type checker): Search for Python: Language Server and select Pyright, then install it via pip install pyright.
• Verify your Python interpreter is set correctly: Click the Python version in the bottom-right corner of VS Code, and select the environment where you installed your linter.

With these settings, your example code:

def say(what):
    print(what)
say()  # This should now show an error!

will trigger a clear warning about the missing required positional argument.

Spyder Fixes #

Spyder has built-in code analysis, but sometimes the settings need a tweak:

1. Open Spyder's Preferences (Tools > Preferences in the menu bar)
2. Navigate to Editor > Code Introspection and Analysis
3. Make sure Real-time code analysis is checked
4. Under Static code analysis, ensure at least one linter (like pylint or pyflakes) is enabled. If you haven't installed them, run pip install pylint pyflakes in your environment first.
5. Restart Spyder to apply the changes.

Once configured, Spyder will flag the say() call with a red underline and a tooltip explaining the missing argument.

Common Troubleshooting Tips #

• If the linter still isn't working, double-check that your IDE is using the correct Python environment (virtual environments are a common culprit here—your IDE might be pointing to a global Python without the linter installed).
• For VS Code, you can also open the "Problems" panel (Ctrl+Shift+M) to see all detected issues, even if the inline highlight isn't showing up immediately.

内容的提问来源于stack exchange，提问作者Turo