Flask
PyPIv3.1.3A simple framework for building complex web applications.
Not recommended for new projects
No — Flask should not be adopted for new projects. No license declared — you have no explicit right to use this code.
- ?Adoption: grade ?, Not reported by this registry.
No download data reported for this package yet.
- BMaintenance: grade B, Good.
Last published 203 days ago. 4 releases in the last 2 years.
- BWeight: grade B, Good.
Pulls in 8 transitive packages, about 285 KB installed (at least — some of the tree is still being crawled).
- BSupply chain: grade B, Good.
This package lists no maintainer.
- FLicense: grade F, Failing.
No license declared — you have no explicit right to use this code.
Grades are computed deterministically from registry metadata collected by PackageGraph — downloads, dependents, publish dates, the resolved dependency tree, maintainer count, and declared licenses. No third-party scores are used.
Install cost
What you actually take on by adding Flask to a project.
Runtime packages this one declares itself.
Distinct packages in the full runtime tree, deduplicated the way a package manager would.
Unpacked size of this package plus its entire runtime tree.
Longest resolved dependency chain below this package.
Part of this dependency tree has not been crawled yet, so these figures are a lower bound rather than a final total.
Compatibility
- Python
- python >=3.9
Quick start
A usage example from the Flask README.
# save this as app.py
from flask import Flask
app = Flask(__name__)
@app.route("/")
def hello():
return "Hello, World!"Dependencies
Declared by Flask v3.1.3. Runtime dependencies are installed with the package; dev dependencies are not.
Runtime (7)
Relationship graph
Dependencies (left) and dependents (right) of Flask.
Release history
3 releases in the last two years, typically about 64 days apart.
| Version | Published | Size | License |
|---|---|---|---|
| 3.1.3latest | 6 months ago | 101 KB | — |
| 3.1.2 | 1 year ago | 101 KB | — |
| 3.1.1 | 1 year ago | 101 KB | — |
| 3.1.0 | 1 year ago | 101 KB | — |
| 3.0.3 | 2 years ago | 99 KB | — |
| 3.0.2 | 2 years ago | 99 KB | — |
| 3.0.1 | 2 years ago | 99 KB | — |
| 3.0.0 | 2 years ago | 97 KB | — |
| 2.3.3 | 3 years ago | 94 KB | — |
| 2.2.5 | 3 years ago | 99 KB | — |
| 2.3.2 | 3 years ago | 95 KB | — |
| 2.3.1 | 3 years ago | 95 KB | — |
| 2.3.0 | 3 years ago | 95 KB | — |
| 2.2.4 | 3 years ago | 99 KB | — |
| 2.2.3 | 3 years ago | 99 KB | — |
Overview
Flask is an PyPI package that a simple framework for building complex web applications. The latest version is 3.1.3.
Who should use it
Teams working in the PyPI ecosystem who need a simple framework for building complex web applications and value a focused solution.
When not to use it
Consider an alternative if you need to or if a more actively-maintained option better fits your PyPI stack.
Pros
- Actively published to the registry.
Cons
- No license detected — review usage terms before adopting.
Auto-generated from collected registry metadata. No external claims are inferred.
Funding
Frequently asked questions
Should I use Flask?
No — Flask should not be adopted for new projects. No license declared — you have no explicit right to use this code.
How do I install Flask?
Run `pip install Flask` to add Flask to your PyPI project.
How many dependencies does Flask have?
Flask declares 7 direct dependencies and pulls in 8 packages in total once its runtime tree is resolved totalling about 285 KB on disk.
What license is Flask released under?
No license was detected in Flask's metadata; review the repository before use.
Is Flask still maintained?
The most recent release of Flask (v3.1.3) was published 6 months ago.