import flask could not be resolved from source pylance

Question

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 additional information as below.

import flask could not be resolved from source pylance

The server is running fine though. Should i be ignoring the notification? If not what dependency have i missed?

Below is the code to setup the server

from flask import Flask
app = Flask(__name__)

@app.route('/')
def hello_world():
return 'Hello, World!'

it probably just means the python your editor is using is not the same interpreter that you're running when you run the server — M Z, Jan 13 '21 at 02:25
Im using VS Code and installed Python 3.9.0 64 bit. What steps can i take to fix this please. — Jag99, Jan 13 '21 at 02:35
on the bottom left corner you should be able to see `Python 3.x.x`, click it, and make sure it is pointing to your system python — M Z, Jan 13 '21 at 02:40
The system version is 2.7.16. When i select this interpreter, flask module still has the underline. — Jag99, Jan 13 '21 at 04:30
I came across the below link but not sure, what value i should assign for "python.autoComplete.extraPaths": ["./path-to-your-code"], in the vscode settings.json? https://stackoverflow.com/questions/65252074/import-path-to-own-script-could-not-be-resolved-pylance-reportmissingimports — Jag99, Jan 13 '21 at 04:58
What if you're using venv? Can you tell VSCode to use that specific Python module? — Peter Poliwoda, Apr 19 '21 at 13:40
Hope this link helps https://techinscribed.com/python-virtual-environment-in-vscode/ — Jag99, Apr 21 '21 at 01:22
Peter - Yes, what you need to do is install the needed packages AFTER activating the virtual environment. For example, if "flask" module can't be resolved, first go to the terminal and run "env\Scripts\activate" if you called the virtual environment "env". Then install the package simply like "pip install flask". It will install the package into the virtual environment. — Conor, Jun 24 '22 at 10:54

score 29 · Answer 1 · answered Oct 05 '21 at 18:35

29

Firstly Create a Virtual Environment on your terminal
then install your flask by pip install flask
after install CTRL+SHIFT+P
Search Python Interpreter
Select Your virtual Environment

Problem Will bi fixed. I have also faced same problem. but I have fixed it following this procedure

answered Oct 05 '21 at 18:35

Saroar Zahan Sojib

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It's important to note that if you navigate to the interpreter with the file browser, the symlinked interpreter will be selected, which won't fix the problem. Use a relative file path from your project folder instead, e.g., `../venv/bin/python` if your project folder is a sibling of your virtual environment. – Magnus Lind Oxlund Jan 28 '23 at 19:53

score 19 · Accepted Answer · answered Jan 13 '21 at 08:27

19

When I did not install the module "flask", I ran into the problem you described:

The reason is that the module "flask" is not installed in the Python environment we currently use in VSCode.

Please use the shortcut key Ctrl+Shift+` to open a new VSCode terminal, it will automatically enter the currently selected environment, and then use the command "pip show flask" to check the installation location of the module "flask":

If it still shows that the module could not be resolved, it is recommended that you reinstall the module "flask".

answered Jan 13 '21 at 08:27

Jill Cheng

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Thanks Jill. Based on your solution, i noticed flask was installed in the project directory and not in the main python directory. I removed flask and reinstalled and its in the correct location as below: Location: /Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages – Jag99 Jan 13 '21 at 21:54

score 8 · Answer 3 · answered Sep 20 '21 at 05:36

8

In VS Code, Go to "Python: Select interpreter" by Ctrl + Shift + P. Choose python interpreter ('base': conda)

answered Sep 20 '21 at 05:36

Bibin

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score 7 · Answer 4 · answered Feb 17 '22 at 13:07

This happens when the Python interpreter on VS Code is not the same as that in your virtual environment. Click on the Python version on the lower left corner. In the "Select Interpreter" bar, select the venv Python or create a new interpreter path by copying the same from your Python file in the venv/bin directory.

score 5 · Answer 5 · answered Nov 17 '22 at 04:51

go to your vs code terminal then type this command

sudo apt install python3-venv
python3 -m venv my-project-env
source my-project-env/bin/activate
pip install flask
after install CTRL+SHIFT+P and search for Python Interpreter
Select Your virtual Environment my-project-env which has created in above
now check the output. problem will be solved like this.

score 1 · Answer 6 · answered Oct 27 '21 at 06:08

In case you are using a virtual environment;

Create a virtual environment.

python3.9 -m venv --without-pip virtual
Activate the virtual environment.

source virtual/bin/activate
Install the pip for the created virtual environment.

curl https://bootstrap.pypa.io/get-pip.py | python
Install flask into the virtual env.

pip install flask
Create the python file. For your case,

touch server.py
Open file and import the module
If it underlines again, install pip again while the .py file is still open.

pip install flask

score 0 · Answer 7 · edited Sep 08 '21 at 08:08

0

I experienced the same situation until I changed the virtual environment of my VS Code to indicate the correct value that I should use:

screenshot of my VSCode

edited Sep 08 '21 at 08:08

Adrian Mole

49,934
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answered Sep 08 '21 at 01:10

deji techserv

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score 0 · Answer 8 · edited Jun 21 '23 at 09:43

All these answers are very helpful but if you are still stuck then try this method in which after creating a Virtual Environment we will select our interpreter path manually:

First open your project in VSCode. Make Venv and then at right bottom of your editor see there is an option to select Python version like this:

Link To Image

Then click on python version and you can see window like this:

Select Interpretor

Then click on "Enter interpreter path" and Select Interpreter that you created recently which is located inside the scripts folder:

Select Interpretor

Hope this helps. Happy coding!

score 0 · Answer 9 · answered Jul 25 '23 at 10:13

This answer is for posterity

Check whether the virtual env is activated and the right interpreter selected (you can see this in bottom-right of VS code).
Check whether the dependency which you have installed is present in virtual env or not. ex: pip show flask in terminal should give the flask location in virtual env not global.
If above 2 steps didn't solve the problem then use Ctrl+Shift+P and type reload window and click it. This should solve the issue as it did for me.

import flask could not be resolved from source pylance

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