keepa 0.17.0

keepa
=====
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Python module to interface to `Keepa <https://keepa.com/>`_ to query for Amazon product information and history.

Documentation can be found on readthedocs at `keepa <https://keepaapi.readthedocs.io/en/latest/>`_.


Requirements
------------
Module is compatible with Python 2 and 3. keepa requires:

- ``numpy``
- ``requests``

Product history can be plotted from the raw data when ``matplotlib`` is installed.

Interfacing with the ``keepa`` requires an access key and a monthly subscription from `keepa <https://keepa.com/#!api>`_


Installation
------------
Module can be installed from PyPi with:

pip install keepa

Source code can also be downloaded from `GitHub <https://github.com/akaszynski/keepa>`_ and installed using ``python setup.py install`` or ``pip install .``


Brief Example
-------------
.. code:: python

import keepa
accesskey = 'XXXXXXXXXXXXXXXX' # enter real access key here
api = keepa.Keepa(accesskey)

# Single ASIN query
products = api.query('B0088PUEPK') # returns list of product data

# Plot result (requires matplotlib)
keepa.plot_product(products[0])

.. figure:: https://github.com/akaszynski/keepa/raw/master/docs/source/images/Product_Price_Plot.png
:width: 500pt

Product Price Plot

.. figure:: https://github.com/akaszynski/keepa/raw/master/docs/source/images/Product_Offer_Plot.png
:width: 500pt

Product Offers Plot


Detailed Example
----------------

Import interface and establish connection to server

.. code:: python

import keepa
accesskey = 'XXXXXXXXXXXXXXXX' # enter real access key here
api = keepa.Keepa(accesskey)

Single ASIN query

.. code:: python

products = api.query('059035342X')

# See help(api.query) for available options when querying the API

Multiple ASIN query from List

.. code:: python

asins = ['0022841350', '0022841369', '0022841369', '0022841369']
products = api.query(asins)

Multiple ASIN query from numpy array

.. code:: python

asins = np.asarray(['0022841350', '0022841369', '0022841369', '0022841369'])
products = api.query(asins)

Products is a list of product data with one entry per successful result from the Keepa server. Each entry is a dictionary containing the same product data available from `Amazon <http://www.amazon.com>`_.

.. code:: python

# Available keys
print(products[0].keys())

# Print ASIN and title
print('ASIN is ' + products[0]['asin'])
print('Title is ' + products[0]['title'])

The raw data is contained within each product result. Raw data is stored as a dictionary with each key paired with its associated time history.

.. code:: python

# Access new price history and associated time data
newprice = products[0]['data']['NEW']
newpricetime = products[0]['data']['NEW_time']

# Can be plotted with matplotlib using:
import matplotlib.pyplot as plt
plt.step(newpricetime, newprice, where='pre')

# Keys can be listed by
print(products[0]['data'].keys())

The product history can also be plotted from the module if ``matplotlib`` is installed

.. code:: python

keepa.plot_product(products[0])

You can obtain the offers history for an ASIN (or multiple ASINs) using the ``offers`` parameter. See the documentation at `Request Products <https://keepa.com/#!discuss/t/request-products/110/1>`_ for further details.

.. code:: python

products = api.query(asins, offers=20)
product = products[0]
offers = product['offers']

# each offer contains the price history of each offer
offer = offers[0]
csv = offer['offerCSV']

# convert these values to numpy arrays
times, prices = keepa.convert_offer_history(csv)

# for a list of active offers, see
indices = product['liveOffersOrder']

# with this you can loop through active offers:
indices = product['liveOffersOrder']
offer_times = []
offer_prices = []
for index in indices:
csv = offers[index]['offerCSV']
times, prices = keepa.convert_offer_history(csv)
offer_times.append(times)
offer_prices.append(prices)

# you can aggregate these using np.hstack or plot at the history individually
import matplotlib.pyplot as plt
for i in range(len(offer_prices)):
plt.step(offer_times[i], offer_prices[i])
plt.show()


Credits
-------
This Python code, written by Alex Kaszynski, is based on Java code written by Marius Johann, CEO keepa. Java source is can be found at `keepa <https://github.com/keepacom/api_backend/>`_.


License
-------
Apache License, please see license file. Work is credited to both Alex Kaszynski and Marius Johann.