GSW_AI_LAB/pycarl-2.0.4/doc/source/getting_started.rst

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Getting Started
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Before starting with this guide, one should follow the instructions for :doc:`installation`.

A Quick Tour through pycarl
===========================

We start by launching the python 3 interpreter::

	$ python3

First we import pycarl::

    >>>	import pycarl

Pycarl can use two different number types: ``gmp`` and ``cln``.
In this example we will use ``gmp`` numbers and therefore import the corresponding module::

    >>> import pycarl.gmp

	
Simple arithmetic operations
----------------------------
.. seealso:: `01-getting-started.py <https://github.com/moves-rwth/pycarl/blob/master/examples/01-getting-started.py>`_

We start by doing some simple arithmetic operations.
First we create two variables ``x`` and ``y``::

	>>> pycarl.clear_variable_pool()
	>>> x = pycarl.Variable("x")
	>>> y = pycarl.Variable("y")

We perform some operations on polynomials by using the common arithmetic operations of python::

	>>> pol1 = x * x + pycarl.gmp.Integer(2)
	>>> pol2 = y + pycarl.gmp.Integer(1)
	>>> result = pol1 * pol2
	>>> print("({}) * ({}) = {}".format(pol1, pol2, result))
	(x^2+2) * (y+1) = x^2*y+2*y+x^2+2