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Questions tagged [pylance]

Pylance is an extension for Visual Studio Code that provides a language server for Python. When applying this tag to your question, consider also tagging it with [visual-studio-code] and/or [python].

Pylance is a language server to support the core Python extension for Visual Studio Code. Its aim is to help developers write Python code better and faster by providing auto-imports, semantic highlighting, built-in reporting of warnings and errors, strict type-checking, and method signatures with type information when displaying the popup Intellisense documentation.

It was first introduced in a post on Microsoft's Python development blog: Announcing Pylance: Fast, feature-rich language support for Python in Visual Studio Code:

To deliver an improved user experience, we’ve created Pylance as a brand-new language server based on Microsoft’s Pyright static type checking tool. Pylance leverages type stubs (.pyi files) and lazy type inferencing to provide a highly-performant development experience. Pylance supercharges your Python IntelliSense experience with rich type information, helping you write better code, faster. The Pylance extension is also shipped with a collection of type stubs for popular modules to provide fast and accurate auto-completions and type checking.

It was made available starting VS Code 1.49 (2020.8.0 (12 August 2020) release).

  1. Expose Pylance setting in python.languageServer. If Pylance extension is not installed, prompt user to install it. (#13122)

Installation is straightforward:

  1. Install the Pylance extension
  2. Configure your settings.json file 
    "python.languageServer": "Pylance",
  3. Open a .py file and the extension should activate

For more information:

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What debugging extension of VS code to use numpy?

I just started using VS code to code in python and i have to choose the right extension to run and debug my code. By default i chose the recommanded one : Pylance. My code is starting with : import numpy as np Though I made sure to use the command…
eglantine_viala
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Disable Pylance for a specific command

I use Python interactive in Visual Studio Code. I sometimes use the display command, which runs fine in the Notebook that is opened on the side, but Pylance marks it as: "display" is not defined Pylance(reportUndefinedVariable). This probably…
Joris Limonier
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"pytest" is not accessed / Import "pytest" could not be resolved - Pylance

I haven't touched python in a long time and I forgot how much of a pain importing can be. So I'm using pylance and pipenv as my shell. I have pytest installed in my local env, I can run pytest from the command line and test my code. However, I can't…
Brandon-Perry
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Pylance import speech recognition could not be resolved

I've got some issue with python. I want to import Speech Recognition module and though it's installed already pylance couldn't resolve itenter image description here
Pablo203
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VSC Pylance disable linting for Python

I am using the Python and Pylance extensions in Visual Studio Code for the benefit of syntax highlighting, auto completion and code suggestions. Whenever I save a file within the workspace, the linter automatically parses the file and makes…
Skully
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PyLance giving "Code is unreachable" for BinanceSocketManager Websocket Usage

PyLance giving "Code is unreachable" for BinanceSocketManager Websocket Usage Is this a bug or this code is really not working? async def main(coin): bm = BinanceSocketManager(client) ts = bm.trade_socket(coin) async with ts as tscm: …
Berkant Dirim
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method eel.addText doesn't exist yet can run dispiting Pylance reportGeneralTypeIssues

I'm trying to modify this python file on GitHub with VS Code on Mac. And Pylance keeps complaining "addText" is not a known member of module Pylance reportGeneralTypeIssues on this line eel.addText("data.json has been created…
Pablo LION
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Selenium with if-else statements not working

I am trying to open a webpage with selenium at a specific time, but it's not working. Here's my code: import time from selenium import webdriver from datetime import datetime while True: PATH = "chromedriver.exe" driver =…
Swanith
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VSCode / Pylance Problems not showing in the popover when hovering with the mouse

I'm on VS Code Version: 1.62.0 with the Language Server version: v2021.11.0. When I hover with the mouse on a problem, I can't see linter error messages (e.g., flake8 messages are available just in the problem section at the bottom, but not in the…
floatingpurr
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Error from pylance when trying to create a S3 bucket

s3 = boto3.resource("s3") s3_client = boto3.client('s3') name = "devopsProject" bucketName = (name + str(uuid.uuid4())) def createBucket(): ##### Create the S3 Bucket ##### try: print('Creating S3 Bucket...') new_bucket =…
Kirra Lissa
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How can I see the default values for the Python Diagnostic Severity Rules in VS Code?

How can I see (or extract in a JSON file) the default values for the Diagnostic Severity Rules for Python in VS Code, as described here? https://github.com/microsoft/pylance-release/blob/main/DIAGNOSTIC_SEVERITY_RULES.md#diagnostic-severity-rules
Jaxx
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getting "User" is not accessedPylance - error notification

I have installed python 3.9.7 64-bit in Windows 10 - I am using VSCode editor- installed flask, flask-login, flask-sqlalchemy using pip install command line. I created models.py with below commands from .import db from flask_login import…
Rockwell Gavaskar P
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Is there any way to avoid the ["screen" is not defined Pylance] in Pygame Zero?

import pgzrun def draw(): screen.draw.text("Hello World", topleft=(10, 10)) pgzrun.go() Is there any way to avoid the "screen" is not defined Pylance? This code does succeed in execution. "screen" is a global variable in…
lee
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Python vscode method help when hovering

Using Python with vscode. How can I get help on module methods when hovering? Say this is the code: g = df.groupby('key').value g.mean() I would like that hovering on g.mean() would return the same as help(g.mean). Is that possible?
JohnRos
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Django request not recognized

I am currently learning Django with video tutorials and I came across a problem I can't get rid of. I am in the views file of one of my apps and when I try to use "request" it tells me '"request" is not definedPylancereportUndefinedVariable' from…
thatfridgemagnet
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