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quantities

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A Python package for handling physical quantities. The source code and issue tracker are hosted on github:

https://www.github.com/python-quantities/python-quantities

Download

Get the latest version of quantities from https://pypi.python.org/pypi/quantities/

To get the git version do:

$ git clone git://github.com/python-quantities/python-quantities.git

Documentation and usage

You can find the official documentation at:

http://python-quantities.readthedocs.io/

Here is a simple example:

>>> import quantities as pq
>>> distance = 42*pq.metre
>>> time = 17*pq.second
>>> velocity = distance / time
>>> "%.3f %s" % (velocity.magnitude, velocity.dimensionality)
'2.471 m/s'
>>> velocity + 3
Traceback (most recent call last):
  ...
ValueError: Unable to convert between units of "dimensionless" and "m/s"

Installation

quantities has a hard dependency on the NumPy library. You should install it first, please refer to the NumPy installation guide:

http://docs.scipy.org/doc/numpy/user/install.html

To install quantities itself, then simply run:

$ python setup.py install --user

If you install it system-wide, you may need to prefix the previous command with sudo:

$ sudo python setup.py install

Tests

To execute all tests, run:

$ python setup.py test

in the current directory. The master branch is automatically tested by Travis CI.

Author

quantities is written by Darren Dale

License

Quantities only uses BSD compatible code. See the Open Source Initiative licenses page for details on individual licenses.

See doc/user/license.rst for further details on the license of quantities

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Quantities package for the python programming language

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