tau

0.1.0 GPL (GNU General Public License)    
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Time series database

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tau is an open source, GPL licensed tool that provides a time series database API.

Start tau server (with memory backend):

./tau.py server -b memory

Use TauClient to access the database from python:

from tau import TauClient
tau = TauClient()


Send some values:

tau.set(my_key='my_value')
tau.set(my_key=3.1415)
tau.set({'my_key': 6.283})


Receive values back (possibly from another process):

assert tau.get('my_key') == 6.283

Receive previous values over a period (in seconds):

assert tau.get('my_key', period=30) == ['my_value', 3.1415, 6.283]

Receive previous values with their timestamps:

data = tau.get('my_key', period=30, timestamps=True)

assert data == [[datetime(...), 'my_value'],
 [datetime(...), 3.1415],
 [datetime(...), 6.283]]


Send some more values, any JSON-serializable values will do:

tau.set(another_key=42, yet_another_key=True)

Receive all available values:

assert tau.get('*') == {'my_key': 6.283,
 'another_key': 42,
 'yet_another_key': True}


Receive values based on a patter, using *, ?, [abc]:

assert tau.get('*_key') == {'my_key': 6.283,
 'another_key': 42,
 'yet_another_key': True}
assert tau.get('*another_key') == {'another_key': 42,
 'yet_another_key': True}


For more examples see test_*.py files.

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Last updated on September 15th, 2012

#time series #database API #Python module #Python #time #series #database

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