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_model: project
---
name: Flask
---
tagline: a flexible and popular web development framework
---
website: http://flask.pocoo.org/
---
documentation: http://flask.pocoo.org/docs/
---
pypi_name: Flask
---
body:
Flask is a Python web development framework based on the
[Werkzeug](../werkzeug/), [Jinja](../jinja/), [MarkupSafe](../markupsafe/)
and [itsdangerous](../itsdangerous/) pallets libraries. It was originally
created in 2010 and has since powered some of the largest websites on the
internet.
## Flask is Fun
```python
from flask import Flask
app = Flask(__name__)
@app.route("/")
def hello():
return "Hello World!"
if __name__ == "__main__":
app.run()
```
## And Easy to Setup
```
$ pip install Flask
$ python hello.py
* Running on http://localhost:5000/
```
Ready for production? [Read this first](http://flask.pocoo.org/docs/deploying/).