Skip to main content

A connector to connect to the Lizard-API (https://demo.lizard.net/api/v2/) with Python.

Project description

lizard-connector
================

Introduction
------------

Connector to Lizard api (e.g. https://demo.lizard.net/api/v3) for python.

Includes:
- Client (experimental / alpha)
- Endpoint (Easy access to Lizard api endpoints)
- Connector (http handling)
- parsers to parse the json obtained from Endpoint queries
- queryfunctions for special cases such as geographical queries and time
related queries other queries can be input as a dictionary
- callbacks for async data handling.

When pandas, numpy are installed the Client returns `pandas.DataFrame`s and/or
`numpy.array`s in a `ScientifResult` object.

Example usage
-------------

An example jupyter notebook can be found `Example_EN.ipynb` or in Dutch:
`Voorbeeld_NL.ipynb`.

Use one endpoints https://demo.lizard.net/api/v2 in Python with the Endpoint
class::

from lizard_connector import Client
import lizard_connector.queries
import datetime

# Fill in your username and password (your password will be prompted)
client = lizard_connector.Client(
username = "example.username"
)

endpoint = 'timeseries'
south_west = [48.0, -6.8]
north_east = [56.2, 18.9]

organisation_id = 'example_organisation_uuid'

start = datetime.datetime(1970, 1, 1)
end = datetime.datetime.now()

relevant_queries = [
lizard_connector.queries.in_bbox(south_west, north_east, endpoint),
lizard_connector.queries.organisation(organisation_id, endpoint),
lizard_connector.queries.datetime_limits(start, end)
]

results = client.timeseries.get(*relevant_queries)


Usage with PyQT (for Qgis plugins)
----------------------------------
You can create a QThread worker like so::

from PyQt4.QtCore import QThread
from PyQt4.QtCore import pyqtSignal


class Worker(QThread):
"""This class creates a worker thread for getting the data."""
output = pyqtSignal(object)

def __init__(self, parent=None, endpoint=None, *querydicts, **queries):
"""Initiate the Worker."""
super(Worker, self).__init__(parent)
self._endpoint = endpoint
self._querydicts = querydicts
self._queries = queries

def run(self):
"""Called indirectly by PyQt if you call start().
This method retrieves the data from Lizard and emits it via the
output signal as dictionary.
"""
data = self._endpoint._synchronous_get_async(
*self._querydicts, **self._queries)
self.output.emit(data)


Credits
=======

- roel.vandenberg@nelen-schuurmans.nl started this library


Changelog of lizard-connector
===================================================


0.7 (2018-04-17)
----------------

- Added Client.

- Added parsers (scientific, json).

- Added callbacks.

- Renamed Endpoint `download...` methods to `get...`.


0.6 (2018-02-07)
----------------

- Add explicit py2/3 imports to mitigate problems with the ``future`` library.


0.5 (2017-10-16)
----------------

- Compatible with python 2.7.

- Refactored pagination.

- Added Async downloads with callback.

- Removes max_result on Endpoint initialisation.


0.4 (2016-06-05)
----------------

- Fixed bug in iteration over paginated results.

- When all_pages is set to False all methods involving get return the object as
an iterator.


0.3 (2016-05-06)
----------------

- Http base urls are not allowed, throws exception when baseurl is not secure
(i.e. does not start with https).

- Fixed a bug that caused a get to run two times.


0.2 (2016-05-04)
----------------

- Added Datatype classes.

- Renamed Endpoint get and post to download and upload.


0.1 (2016-03-29)
----------------

- Basic setup

- Added tests

- Initial project structure created with nensskel 1.37.dev0.

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

lizard-connector-0.7.tar.gz (62.3 kB view hashes)

Uploaded Source

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page