Determining what version of Flask is installed

Question

What's the easiest way to determine which version of Flask is installed?

Mark Hildreth · Accepted Answer · 2012-08-06 17:28:47Z

As of flask 0.7 (June 28th, 2011), a __version__ attribute can be found on the flask module.

>> import flask
>> flask.__version__

Keep in mind that because prior to flask 0.7 there was no __version__ attribute, the preceding code will result in an attribute error on those older versions.

For versions older than flask 0.7, you might be able to determine it using pkg_resources as shown below:


>>> import pkg_resources
>>> pkg_resources.get_distribution('flask').version
'0.6.1'

This won't work 100% though. It depends on the user having the pkg_resources library installed (it might come by default with a Linux distribution's python installation, but since it's not part of the standard library you can't be positive), and also that the user installed flask in a way that pkg_resources can find it (for example, just copying the full flask source code into your directory puts it out of the range of pkg_resources).

Saša Šijak · Accepted Answer · 2013-12-06 15:15:54Z

25

More general way of doing it is :

pip freeze

It will list all installed python packages and their versions. If you want to see just flask then try :

pip freeze | grep flask

answered Dec 6, 2013 at 15:15

Saša Šijak

9,4775 gold badges52 silver badges85 bronze badges

Comments

jpanganiban · Accepted Answer · 2011-09-17 13:59:17Z

21

Via the python interpreter.

>> import flask
>> flask.__version__
'0.7.2'

If flask was installed via pip or easy_install, you can always use the 'pip freeze' command.

answered Sep 17, 2011 at 13:59

jpanganiban

1,09910 silver badges9 bronze badges

2 Comments

Matthew Rankin Over a year ago

While that may work with newer versions of Flask, I just confirmed that flask.__version__ does not work with Flask 0.6.1.

Matthew Rankin Over a year ago

I upgraded Flask to 0.7.2 and confirmed that flask.__version__ does work. Time marches on.

score 14 · Accepted Answer · 2019-11-25 16:18:17Z

14

It's quite simple !

In your terminal:

pip freeze | grep Flask

The output should be something like this:

Output: Flask==0.12

edited Nov 25, 2019 at 16:18

answered Mar 3, 2017 at 13:22

user5683940

Comments

lopezi · Accepted Answer · 2018-11-06 12:29:50Z

9

Tested whith Flask 1.0.2

Inside the venv run flask --version

answered Nov 6, 2018 at 12:29

lopezi

5472 gold badges7 silver badges21 bronze badges

Comments

Anshul Singhal · Accepted Answer · 2019-11-20 05:49:33Z

8

If someone is trying to determine flask version via Anaconda Command Prompt then just run the following command:

flask --version

Above command will give following output format:

Python 3.7.3
Flask 1.1.1
Werkzeug 0.15.4

answered Nov 20, 2019 at 5:49

Anshul Singhal

2,24124 silver badges27 bronze badges

Comments

Hackaholic · Accepted Answer · 2014-11-16 02:31:29Z

3

using dpkg:

dpkg -l | grep flask

output:

ii  python-flask 0.8-1 all micro web framework based on Werkzeug, Jinja2 and good intentions

answered Nov 16, 2014 at 2:31

Hackaholic

19.8k6 gold badges59 silver badges77 bronze badges

Comments

Thulasiram Bandaru · Accepted Answer · 2019-05-06 05:19:07Z

3

>>> import flask
>>> flask.__version__        #(To find the version)
'1.0.2'
>>> print flask.__file__     #(To find out the path where it is installed)
/usr/local/rnt/lib/python2.7/site-packages/flask/__init__.pyc

answered May 6, 2019 at 5:19

Thulasiram Bandaru

1014 bronze badges

Comments

Jimmy Long · Accepted Answer · 2019-12-15 18:00:37Z

2

If managing with pip can just use list command to see all the packages and versions

pip list

answered Dec 15, 2019 at 18:00

Jimmy Long

7862 gold badges9 silver badges25 bronze badges

Comments

hundredmiles · Accepted Answer · 2020-09-01 13:10:39Z

Update on Flask version 1.1.2

If Flask not installed then go to the required conda environment and write:

$ conda activate "name of conda environment" //py3 in my case
(py3)$ conda install flask

Post installation check the version with command:

(py3)$ flask --version

Please Note: __version__ is not an attribute of flask anymore for the latest versions and thus flask.__version__ would throw an error

Terminal Output

(py3) xxxxxx@xxxxx:~$ flask --version
Python 3.7.7
Flask 1.1.2
Werkzeug 1.0.1

NHKAIZEN · Accepted Answer · 2022-10-05 18:31:01Z

1

just type pip show flask on cmd. You will get all the information about the installed flask. it will show you : name location version and many more

answered Oct 5, 2022 at 18:31

NHKAIZEN

112 bronze badges

2 Comments

OneCricketeer Over a year ago

Doesn't this just show Pypi information? Not the current installed version? Or even if it is installed?

NHKAIZEN Over a year ago

then you write from flask import Flask in your IDE (pyCharm). If it does not show any red line or error this means it is installed Else it will show an error or red line whenever you import flask. You can also try this : python -m flask --version

user459872 · Accepted Answer · 2023-10-27 14:00:48Z

0

Flask 3.0.0(released on 2023-09-30) deprecated the __version__ attribute and will be removed in Flask 3.1. The recommended way to access the version would be by using importlib.metadata.version API.

>>> import flask
>>> import importlib
>>> flask.__version__
<stdin>:1: DeprecationWarning: The '__version__' attribute is deprecated and will be removed in Flask 3.1. Use feature detection or 'importlib.metadata.version("flask")' instead.
'3.0.0'
>>> 
>>> importlib.metadata.version("flask")
'3.0.0'
>>>

edited Oct 27, 2023 at 14:00

answered Oct 10, 2023 at 5:25

user459872

25.9k4 gold badges51 silver badges74 bronze badges

Comments

Nimantha · Accepted Answer · 2020-05-24 08:59:10Z

-1

Just type:

python -m flask --version

Output:

Python 3.7.2 
Flask 1.1.1 
Werkzeug 0.16.0

edited May 24, 2020 at 8:59

Nimantha

6,5376 gold badges32 silver badges78 bronze badges

answered May 24, 2020 at 6:50

alxdx

11 bronze badge

Comments

Zain Ul Abideen · Accepted Answer · 2021-04-28 16:52:45Z

-1

Type flask --version in your interpreter, for example: enter image description here

answered Apr 28, 2021 at 16:52

Zain Ul Abideen

12 bronze badges

1 Comment

k_rus Over a year ago

How is this answer different from the answer in stackoverflow.com/a/53171941/840340 ?

Arti · Accepted Answer · 2022-03-24 18:28:02Z

pip show fastapi uvicorn

Output :

Name: fastapi
Version: 0.75.0
Summary: FastAPI framework, high performance, easy to learn, fast to code, ready for production
Home-page: https://github.com/tiangolo/fastapi
Author: Sebastián Ramírez
Author-email: [email protected]
License: None
Location: /home/mind/Desktop/FASTAPIBasic-/fastenv/lib/python3.8/site-packages
Requires: starlette, pydantic
Required-by: 
---
Name: uvicorn
Version: 0.17.6
Summary: The lightning-fast ASGI server.
Home-page: https://www.uvicorn.org/
Author: Tom Christie
Author-email: [email protected]
License: BSD
Location: /home/mind/Desktop/FASTAPIBasic-/fastenv/lib/python3.8/site-packages
Requires: h11, click, asgiref
Required-by:

Collectives™ on Stack Overflow

Determining what version of Flask is installed

15 Answers 15

Comments

Comments

2 Comments

Comments

Comments

Comments

Comments

Comments

Comments

Comments

2 Comments

Comments

Comments

1 Comment

1 Comment

Hot Network Questions

Collectives™ on Stack Overflow

15 Answers 15

Comments

Comments

2 Comments

Comments

Comments

Comments

Comments

Comments

Comments

Comments

2 Comments

Comments

Comments

1 Comment

1 Comment

Related