dweepy 0.3.0

Dweepy is a Python client for dweet.io

Dweepy is a simple Python client for dweet.io. Dweepy has a full test suite and aims to have 100% coverage of the dweet.io API (we’re pretty much there already).

Large portions of this README have been adapted from the README of the the official javascript client from buglabs.

Dweepy supports Python 2.6, 2.7, PyPy, 3.3 and 3.4 (and probably later versions too, but I haven’t tested on those).

• Free software: MIT license

• Documentation: https://github.com/paddycarey/dweepy

Installation

Distribute & Pip

Installing dweepy is simple with pip:

$ pip install dweepy

or, with easy_install:

$ easy_install dweepy

But, you really shouldn’t do that.

Get the Code

Dweepy is actively developed on GitHub, where the code is always available.

You can either clone the public repository:

$ git clone git://github.com/paddycarey/dweepy.git

Or download the tarball:

$ curl -OL https://github.com/paddycarey/dweepy/tarball/master

Once you have a copy of the source, you can embed it in your Python package, or install it into your site-packages easily:

$ python setup.py install

Usage

Dweepy aims to provide a simple, pythonic interface to dweet.io. It has been designed to be easy to use, and aims to cover the dweet.io API entirely.

First you’ll need to import dweepy.:

import dweepy

Dweeting

You can send a dweet without specify a name for your thing.:

>>> dweepy.dweet({'some_key': 'some_value'})
{
    u'content': {u'some_key': u'some_value'},
    u'created': u'2014-03-19T10:35:59.504Z',
    u'thing': u'unequaled-start'
}

Note: If you do not specify a name for your thing, dweet.io will assign a random name and return it in the response as above.

You can send a dweet from a thing with a specified name.:

>>> dweepy.dweet_for('this_is_a_thing', {'some_key': 'some_value'})
{
    u'content': {u'some_key': u'some_value'},
    u'created': u'2014-03-19T10:38:46.010Z',
    u'thing': u'this_is_a_thing'
}

Getting Dweets

To read the latest dweet for a thing, you can call:

>>> dweepy.get_latest_dweet_for('this_is_a_thing')
[
    {
        u'content': {u'some_key': u'some_value'},
        u'created': u'2014-03-19T10:38:46.010Z',
        u'thing': u'this_is_a_thing'
    }
]

Note that dweet.io only holds on to the last 500 dweets over a 24 hour period. If the thing hasn’t dweeted in the last 24 hours, its history will be removed.

Or to read all the dweets for a thing, you can call:

>>> dweepy.get_dweets_for('this_is_a_thing')
[
    {
        u'content': {u'some_key': u'some_value'},
        u'created': u'2014-03-19T10:42:31.316Z',
        u'thing': u'this_is_a_thing'
    },
    {
        u'content': {u'some_key': u'some_value'},
        u'created': u'2014-03-19T10:38:46.010Z',
        u'thing': u'this_is_a_thing'
    }
]

Alerts

Set an alert:

>>> dweepy.set_alert(
...     'this_is_a_thing',
...     ['[e-mail]', '[e-mail]'],
...     "if(dweet.alertValue > 10) return 'TEST: Greater than 10'; if(dweet.alertValue < 10) return 'TEST: Less than 10';",
...     'this-is-a-key',
... )
{
    u'thing': u'this_is_a_thing',
    u'condition': u"if(dweet.alertValue > 10) return 'TEST: Greater than 10'; if(dweet.alertValue < 10) return 'TEST: Less than 10';",
    u'is_demo': False,
    u'recipients': [
        {
            u'type': u'email',
            u'address': u'[e-mail]',
        },
        {
            u'type': u'email',
            u'address': u'[e-mail]',
        }
    ]
}

Get an alert (with status):

>>> dweepy.get_alert('this_is_a_thing', 'this-is-a-key')
{
    u'status': {
        u'message': u'',
        u'since': None,
        u'open': False,
        u'alerts_sent_today': 0,
        u'alerts_allowed_today': 100,
    },
    u'thing': u'this_is_a_thing',
    u'condition': u"if(dweet.alertValue > 10) return 'TEST: Greater than 10'; if(dweet.alertValue < 10) return 'TEST: Less than 10';",
    u'is_demo': False,
    u'recipients': [
        {
            u'type': u'email',
            u'address': u'[e-mail]'
        },
        {
            u'type': u'email',
            u'address': u'[e-mail]'
        }
    ]
}

Remove an alert:

>>> dweepy.remove_alert('this_is_a_thing', 'this-is-a-key')
{
    u'thing': u'this_is_a_thing'
}

Subscriptions & Notifications

You can create a real-time subscription to dweets using a “chunked” HTTP response.:

>>> for dweet in dweepy.listen_for_dweets_from('this_is_a_thing'):
>>>     print dweet
{u'content': {u'some_key': u'some_value'}, u'thing': u'this_is_a_thing', u'created': u'2014-03-19T10:45:28.934Z'}
{u'content': {u'some_key': u'some_value'}, u'thing': u'this_is_a_thing', u'created': u'2014-03-19T10:45:31.574Z'}

The server will keep the connection alive and send you dweets as they arrive.

Locking & Security

By default, all things are publicly accessible if you know the name of the thing. You can also lock things so that they are only accessible to users with valid security credentials. To purchase locks, visit https://dweet.io/locks. The locks will be emailed to you.

To lock a thing:

>>> dweepy.lock("my-thing", "my-lock", "my-key")

To unlock a thing:

>>> dweepy.unlock("my-thing", "my-key")
"my-thing"

To remove a lock no matter what it’s attached to:

>>> dweepy.remove_lock("my-lock", "my-key")
"my-lock"

Once a thing has been locked, you must pass the key to the lock with any call you make to other functions in this client library. The key will be passed as an optional keyword argument. For example:

>>> dweepy.dweet_for("my-locked-thing", {"some":"data"}, "my-key")
>>> dweepy.get_latest_dweet_for("my-locked-thing", "my-key")
>>> dweepy.get_dweets_for("my-locked-thing", "my-key")
>>> dweepy.listen_for_dweets_from("my-locked-thing", "my-key")

Failure to pass a key or passing an incorrect key for a locked thing will result in an exception being raised.

Error Handling

When dweepy encounters an error a DweepyError exception is raised. This can happen either when a HTTP request to the dweet.io API fails with an invalid status code, or if the HTTP request succeeds but the request fails for some reason (invalid key, malformed request data, invalid action etc.).

Request Sessions

Each API call allows a request Session to be optionally set to persist certain parameters across dweepy calls. Sessions can be used for:

• reusing the the underlying TCP connection if you’re making several requests to the same host

• configuring HTTP Proxies

• enabling timeouts for HTTP requests

Further information of requests session can be found in Request Session Advanced Usage.

To enable a session (in this case with a 5 second timeout):

>>> import requests
>>> session_with_timeout = requests.session(timeout=5.0)

The session may be used in all dweepy API calls:

>>> dweepy.dweet({'some_key': 'some_value'}, session=session_with_timeout)
>>> dweepy.dweet_for('this_is_a_thing', {'some_key': 'some_value'}, session=session_with_timeout)

Testing

Dweepy has a full test suite (a port of dweetio-client’s test suite). Assuming you have a full source checkout of the dweepy repository, running the tests is simple with tox:

$ pip install tox
$ tox

It is recommended that you use a virtualenv when developing or running the tests to ensure that system libraries do not interfere with the tests.

NOTE: In order for all of the tests to complete successfully you must set several environment variables. There are numerous ways to accomplish this, but I like forego (a golang port of the foreman utility).

To use forego in your tests you should first create a .env file in the root of your repository with the following contents:

DWEET_LOCK=mylock
DWEET_KEY=mykey

Once in place, you can run your tests locally with:

$ forego run tox

If you want to test against a single python version, you can use tox -e e.g.:

$ forego run tox -e py27
$ forego run tox -e pypy
$ forego run tox -e py34

TIP: If you’re using Ubuntu, you can find older/newer versions of python than the one shipped with your distribution here. You can install as many as you like side by side without affecting your default python install.

Copyright & License

Copyright (c) 2014 Patrick Carey (https://github.com/paddycarey)

Licensed under the MIT license.