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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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Import could not be resolved/could not be resolved from source Pylance in VS Code using Python 3.9.2 on Windows 10

My Flask App server is running but I have three imports that cannot be resolved. I have tried: reinstalling the imports individually reinstalling requirements.txt I configured VSCode Workspace with an extra path to my project folder (there is now…
SMKrizan
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'Import "Path.to.own.script" could not be resolved Pylance (reportMissingImports)' in VS Code using Python 3.x on Ubuntu 20.04 LTS

It is a similar situation I'd encountered several months ago using pylint prior to pylance: My python 3.9x - script (using VS Code on Ubuntu 20.04 LTS) starts with the following import of custom "tools": import sys sys.path.append( …
Andreas L.
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Why can't I import requests in VS Code?

I want to use request module, but whenever I tried to import requests I got this message: import "requests" could not be resolved from source Pylance I already used pip to install the requests module, but I still receive this error message.
Betty Gandhi
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Import "flask" could not be resolved from source Pylance (reportMissingModuleSource)

When I am writing from flask import Flask One Yellow line is coming up under flask and stating Import "flask" could not be resolved from source Pylance (reportMissingModuleSource) . Also, I am able to do the work with this package also…
SARIM
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How do I get Pylance to ignore the possibility of None?

I love Pylance type checking. However, If I have a variable var: Union[None, T], where T implements foo, pylance will throw an error at: var.foo() since type None doesn't implement foo. Is there any way to resolve this? A way to tell Pylance "This…
George
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import flask could not be resolved from source pylance

I'm learning Python and part of the course setting up a webserver using Flask. I followed the steps as per the Flask installation documentation and for some reason the flask module is underlined as shown below. When I hover my mouse, I get…
Jag99
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Can't fully disable python linting Pylance VSCODE

I've been searching online for quite a while now and can't seem to find a solution for my problem. I installed Pylance (the newest Microsoft interpreter for Python) and can't seem to disable linting at all. I've tried a lot of options but none…
TheNomad
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Disable specific Pylance linting messages in VS Code settings.json like with "python.linting.pylintArgs"

When Pylance was introduced, I filed a question on how to generally customize Pylance linting. Here, one can find a few ways to customize Pylance, but there is nothing about how to suppress, mute or actually disable certain warnings and errors. As a…
Andreas L.
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What is difference between Python & Pylance VS Code extensions?

I just shifted from my old bud Sublime to VSCode. I really liked the way it works and the features it has. I'm a newbie python developer. I found two popular python extensions for VSCode: Python, and PyLance. My question is, What is the difference…
user11936470
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Visual Studio Code Pylance (report Missing Imports )

I keep getting error "X" could not be resolved Pylance(reportMissingImports) [ln 1, Col8] I AM in fact a beginner, the basic youtube "fixes" are NOT working View Command Pallet ... NOT working Terminal pip install .... NOT working I am running the…
Prabhat Mcdonnough
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Import pandas could not be resolved from source Pylance(reportMissingModuleSource)

I've been trying to use the packages pandas, numpy, matplotlib, seaborn in my "Visual Studio Code", but the program keeps showing me the following message: "import pandas could not be resolved from source…
Joan Cheto
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Suppress Pylance type annotation warning in VS Code

At the company I'm working we use type annotation to define the expected return type from a function. Most developers are using PyCharm but I prefer to stick with VS Code. The following line in the VS Code IDE: def example() -> [str]: Raises a…
Joep
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Pylance not working in VSCode Jupyter notebooks

Pylance works for .py files: But doesn't work with Jupyter .ipynb notebooks: I tried saving the .ipynb - same issue. How can enable Pylance warnings in my notebooks?
Tom Hale
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Using VisualStudio+ Python -- how to handle "overriding stdlib module" Pylance(reportShadowedImports) warning?

When running ipynbs in VS Code, I've started noticing Pylance warnings on standard library imports. I am using a conda virtual environment, and I believe the warning is related to that. An example using the glob library reads: "env\Lib\glob.py" is…
Garrett
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VS Code / Pylance / Pylint Cannot resolve import

The Summary I have a python import that works when run from the VS Code terminal, but that VS Code's editor is giving warnings about. Also, "Go to Definition" doesn't work. The Problem I have created a docker container from the image…
xdhmoore
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