Custom color highlighting for Pylance in VS Code: defined variables in white, undefined variables in red

Question

I am using Pylance in VS Code (Dark Theme), writing Python 3.9.
When semantic highlighting is enabled, well defined variables are colored in cyan and when I use a variable that is not defined (and will yield error when running the code) it is colored in white.

I want to change this such that a well defined variable will be colored in white and undefined variable will be colored in red (the color of error).

I know I need to edit the settings.json but I didn’t find what I am looking for in the documentation below.

References: https://github.com/microsoft/pylance-release#semantic-highlighting

Added in edited:
With the code below (by @JialeDu) this is the result:

Updated test code:

# test
import numpy as np
import os.path as osp

def f(x):
    return 6*x

fx = f(x=1)
fbad = f(x=bad)

x = 1
y = 2 + x + z

a, b = 1, 2

class test():

    def __init__(self):
        self.x1 = 1
        self.x2 = 2

ins1 = test()
print(ins1.x1)

Asked By: Triceratops

||

Source

Answer 1

The following configuration may be useful to you

// settings.json file
{
    "editor.tokenColorCustomizations":{
        "[Default Dark+]": {
            "textMateRules": [
                {
                    "scope": "meta.function-call.arguments.python, source.python",
                    "settings": {
                        "foreground": "#FF0000"
                    }
                },
                {
                    "scope": "variable.other.readwrite",
                    "settings": {
                        "foreground": "#ffffff"
                    }
                },
                {
                    "scope": "punctuation.separator.arguments.python, punctuation.section.function.begin.python,punctuation.separator.parameters.python",
                    "settings": {
                        "foreground": "#D4D4D4"
                    }
                },
            ]
        }
    },
    "editor.semanticHighlighting.enabled": true,
    "workbench.colorTheme": "Default Dark+",
}

looks like this on my computer

Note that the above configuration may cause other unexpected changes. Because scopes of changing the color might work in some other places as well.

Answered By: JialeDu

Custom color highlighting for Pylance in VS Code: defined variables in white, undefined variables in red

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