ratelimit-extended


Nameratelimit-extended JSON
Version 1.0.5 PyPI version JSON
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home_pagehttps://github.com/omert11/ratelimit
SummaryAPI rate limit decorator
upload_time2024-07-23 12:37:45
maintainerNone
docs_urlNone
authorÖmer Faruk Yığın
requires_pythonNone
licenseMIT
keywords ratelimit api decorator
VCS
bugtrack_url
requirements pytest pytest-cov isort mypy pre-commit ruff
Travis-CI No Travis.
coveralls test coverage No coveralls.
            ratelimit-extended
==================

APIs are a very common way to interact with web services. As the need to
consume data grows, so does the number of API calls necessary to remain
up to date with data sources. However, many API providers constrain
developers from making too many API calls. This is known as rate
limiting and, in a worst-case scenario, your application can be banned
from making further API calls if it abuses these limits.

This package introduces a function decorator preventing a function from
being called more often than that allowed by the API provider. This
should prevent API providers from banning your applications by
conforming to their rate limits.

Installation
------------

PyPi
~~~~

Add this line to your application’s ``requirements.txt``:

.. code:: python

   ratelimit-extended

And then execute:

.. code:: bash

   $ pip install -r requirements.txt

Or install it yourself:

.. code:: bash

   $ pip install ratelimit-extended

GitHub
~~~~~~

Installing the latest version from GitHub:

.. code:: bash

   $ git clone https://github.com/omert11/ratelimit.git
   $ cd ratelimit
   $ python setup.py install

Usage
-----

To use this package, simply decorate any function that makes an API
call:

.. code:: python

   from ratelimit import limits

   import requests

   FIFTEEN_MINUTES = 900

   @limits(calls=15, period=FIFTEEN_MINUTES)
   def call_api(url):
       response = requests.get(url)

       if response.status_code != 200:
           raise Exception('API response: {}'.format(response.status_code))
       return response

This function will not be able to make more than 15 API calls within a
15-minute time period.

The arguments passed into the decorator describe the number of function
invocations allowed over a specified time period (in seconds). If no
time period is specified, then it defaults to 15 minutes (the time
window imposed by Twitter).

If a decorated function is called more times than allowed within the
specified time period, then a ``ratelimit.RateLimitException`` is
raised. This may be used to implement a retry strategy such as an
`exponential backoff <https://pypi.org/project/backoff/>`__.

.. code:: python

   from ratelimit import limits, RateLimitException
   from backoff import on_exception, expo

   import requests

   FIFTEEN_MINUTES = 900

   @on_exception(expo, RateLimitException, max_tries=8)
   @limits(calls=15, period=FIFTEEN_MINUTES)
   def call_api(url):
       response = requests.get(url)

       if response.status_code != 200:
           raise Exception('API response: {}'.format(response.status_code))
       return response

Alternatively, to cause the current thread to sleep until the specified
time period has elapsed and then retry the function, use the
``sleep_and_retry`` decorator. This ensures that every function
invocation is successful at the cost of halting the thread.

.. code:: python

   from ratelimit import limits, sleep_and_retry

   import requests

   FIFTEEN_MINUTES = 900

   @sleep_and_retry
   @limits(calls=15, period=FIFTEEN_MINUTES)
   def call_api(url):
       response = requests.get(url)

       if response.status_code != 200:
           raise Exception('API response: {}'.format(response.status_code))
       return response

License
-------

This project is licensed under the `MIT License <LICENSE.txt>`__.

            

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