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flypper-0.1.7
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Flypper is a lightweight feature flag package that ships with a WSGI interface.
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | flypper-0.1.7 |
| نام | flypper |
| نسخه کتابخانه | 0.1.7 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | Nicolas Zermati |
| ایمیل نویسنده | nicoolas25@gmail.com |
| آدرس صفحه اصلی | https://github.com/nicoolas25/flypper |
| آدرس اینترنتی | https://pypi.org/project/flypper/ |
| مجوز | - |
# Flypper: feature flags, with a GUI
Flypper is a lightweight feature flag package that ships with a WSGI interface.
## Installation
Use the package manager [pip](https://pip.pypa.io/en/stable/) to install `flypper`.
```bash
pip install flypper
```
You might want to install one of the following backends instead:
* [`flypper-redis`](https://github.com/nicoolas25/flypper-redis) to store your flags in Redis
* [`flypper-sqlalchemy`](https://github.com/nicoolas25/flypper-sqlalchemy) to store your flags in a RDBMS using SQL-Alchemy (work in progress)
## Why
Feature flags can be instrumental to how a team ships software.
I have a hard take delegating such a critical part to a third-party.
Also, third-parties tends to grow a bigger feature set than the one I need,
to have a per-seat pricing, and to ask for a [SSO tax](https://sso.tax/).
Flypper aims at providing a simple feature flag library one could integrate
directly to their application as a dependency. The feature set is purposedly
small and will require some light work on your side to integrate.
Differences compared to other similar libraries are:
* A scrappy web UI to manage the flags
* An architecture aimed at being used on backends and front-ends
* An efficient caching mecanism to avoid roundtrip to the database
## Usage
The library works with 3 components:
1. A **storage** backend, storing and retrieving flags in a durable way
2. A **client**, acting as an efficient in-memory cache for reading flags
3. A **context**, making flags consistents during its lifespan
| Components and their roles |
|---|
|  |
Here is an example:
```python
from redis import Redis
from flypper import Client as Flypper
from flypper_redis.storage.redis import RedisStorage
# Instanciate a *Storage*
redis_storage = RedisStorage(
redis=Redis(host="localhost", port=6379, db=0),
prefix="flypper-demo",
)
# Instanciate a *Client*
flypper = Flypper(storage=redis_storage)
# Query flags' statuses within a *Context*
with flypper(segment="professionals") as flags:
if flags.is_enabled("graceful_degradation"):
skip_that()
elif flags.is_enabled("new_feature", user="42"):
do_the_new_stuff()
else:
do_the_old_stuff()
```
The web UI acts as a client and only needs a storage:
```python
from flypper.wsgi.web_ui import FlypperWebUI
flypper_web_ui = FlypperWebUI(storage=redis_storage)
```
| Web UI |
|---|
|  |
The web UI can then be mounted as you see fit,
for instance via [`DispatcherMiddleware`](https://werkzeug.palletsprojects.com/en/2.0.x/middleware/dispatcher/).
```python
app = DispatcherMiddleware(app, {"/flypper": flypper_web_ui})
```
⚠ Careful, you might need to wrap the `FlypperWebUI` with your own authentication layer,
for instance like [here](https://eddmann.com/posts/creating-a-basic-auth-wsgi-middleware-in-python/).
## Contributing
Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
Please make sure to update tests as appropriate.
### Work in progress you can contribute to
* Testing the web UI with [pytest and selenium](https://pytest-selenium.readthedocs.io/en/latest/user_guide.html)
* Better support prefixes within the web UI, so redirections work
* Write tutorials and recipes in the `docs/`
### Upcoming feature ideas
* Javascript SDK
* Tracking flags usage efficiently
* More storage backends
## Credits
Inspiration was heavily taken from the following projects.
* [flipper](https://github.com/jnunemaker/flipper)
* [unleash](https://github.com/Unleash/unleash)
* [flipper-client](https://github.com/carta/flipper-client)
Many thanks to their authors, maintainers, and contributors.
## License
[MIT](https://choosealicense.com/licenses/mit/)
نیازمندی
| مقدار | نام |
|---|---|
| >=0.16.1 | Werkzeug |
| >=2.0,<4.0 | Jinja2 |
زبان مورد نیاز
| مقدار | نام |
|---|---|
| >=3.7,<4.0 | Python |
نحوه نصب
نصب پکیج whl flypper-0.1.7:
pip install flypper-0.1.7.whl
نصب پکیج tar.gz flypper-0.1.7:
pip install flypper-0.1.7.tar.gz