A library and command-line tool for working with Boolean expressions
Project description
Synopsis
tt is a Python library and command-line tool for working with Boolean expressions. Please check out the project site for more information.
Installation
tt is tested on CPython 2.7, 3.3, 3.4, 3.5, and 3.6 as well as PyPy. tt is written in pure Python with no dependencies, so it only requires a compatible Python installation to run. You can get the latest release from PyPI with:
pip install ttable
Basic Usage
Below are a couple of examples to show you the kind of things tt can do. For more examples and further documentation, take a look at the project site.
As a Library
tt aims to provide a Pythonic interface for working with Boolean expressions. Here are some simple examples from the REPL:
>>> from tt import BooleanExpression, TruthTable
>>> b = BooleanExpression('A xor (B and 1)')
>>> b.tokens
['A', 'xor', '(', 'B', 'and', '1', ')']
>>> b.symbols
['A', 'B']
>>> print(b.tree)
xor
`----A
`----and
`----B
`----1
>>> b.evaluate(A=True, B=False)
True
>>> t = TruthTable(b)
>>> print(t)
+---+---+---+
| A | B | |
+---+---+---+
| 0 | 0 | 0 |
+---+---+---+
| 0 | 1 | 1 |
+---+---+---+
| 1 | 0 | 1 |
+---+---+---+
| 1 | 1 | 0 |
+---+---+---+
>>> t = TruthTable('A or B', fill_all=False)
>>> print(t)
Empty!
>>> t.fill(A=0)
>>> print(t)
+---+---+---+
| A | B | |
+---+---+---+
| 0 | 0 | 0 |
+---+---+---+
| 0 | 1 | 1 |
+---+---+---+
>>> t.fill(A=1)
>>> print(t)
+---+---+---+
| A | B | |
+---+---+---+
| 0 | 0 | 0 |
+---+---+---+
| 0 | 1 | 1 |
+---+---+---+
| 1 | 0 | 1 |
+---+---+---+
| 1 | 1 | 1 |
+---+---+---+
From the Command Line
tt also provides a command-line interface for working with expressions. Here are a couple of examples:
$ tt tokens "(op1 nand op2) xnor op3"
(
op1
nand
op2
)
xnor
op3
$ tt table A or B
+---+---+---+
| A | B | |
+---+---+---+
| 0 | 0 | 0 |
+---+---+---+
| 0 | 1 | 1 |
+---+---+---+
| 1 | 0 | 1 |
+---+---+---+
| 1 | 1 | 1 |
+---+---+---+
$ tt tree A or or B
Error! Unexpected binary operator "or":
A or or B
^
License
tt uses the MIT License.
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