Equation 1.2
General Equation Parser and Evaluator
Latest Version: 1.2.01
Equation Interpeter
The Equation Package provide an extentable Equation Parser and Evaluation System.
It will take a string such as “sin(x+y^2)” and convert it to a python object that can be called this allow the safe evaluation of equations stored in configuration files or enterned from the keyboard. This Package never calls a python evaluation command hence their is no risk of executing any unexpected python code.
The Generated Expression Object is desgined to behave like a python function, and can be used any where a python funcion is expected, it may be called with either positional or keyword arguments to set the Equations Variables, by default the order of the variables is as they appear in the equation, however an explicit order may be set when the Expression object is created.
Example
>>> from Equation import Expression >>> fn = Expression("sin(x+y^2)",["y","x"]) >>> fn sin((x + (y ^ (2+0j)))) >>> print fn \sin\left(\left(x + y^{(2+0j)}\right)\right) >>> fn(3,4) (0.42016703682664092+0j)
Numpy Arrays Supported
The default function maping used by this package map the operators and functions to Numpy Functions, hence the generated object may be called with numpy arrays.
Latex Support
The display string format i.e. str() is set to use Latex syntax allowing high quality equations to be rendered in output this syntax is supported by the grqaphing package matplotlib
Note
repr() method will return a string suitable for passing to Expression, however it is recalucated from the tokenized expression, and has all brackets.
Future Versions
Goals for future versions are:
 Reduce repr() type respresentation to use only required brackets
 Allow the use of function variable, rather than just predefined functions
File  Type  Py Version  Uploaded on  Size  

Equation1.2py2.7.egg (md5)  Python Egg  2.7  20140707  68KB  
Equation1.2.tar.gz (md5)  Source  20140707  17KB  
Equation1.2.win32.exe (md5)  MS Windows installer  any  20140707  222KB  
Equation1.2.zip (md5)  Source  20140707  24KB  
 Downloads (All Versions):
 32 downloads in the last day
 348 downloads in the last week
 1481 downloads in the last month
 Author: Glen Fletcher
 Documentation: Equation package documentation
 Home Page: https://github.com/alphaomegatechnology/Equation
 Bug Tracker: https://github.com/alphaomegatechnology/Equation/issues
 License: AlphaOmega Technology Open License Version 1.0 (http://www.alphaomegatechnology.com.au/license/AOTOL/1.0)

Categories
 Development Status :: 5  Production/Stable
 Intended Audience :: Developers
 Intended Audience :: Science/Research
 Natural Language :: English
 Operating System :: OS Independent
 Programming Language :: Python :: 2
 Programming Language :: Python :: 2.6
 Programming Language :: Python :: 2.7
 Programming Language :: Python :: 3
 Programming Language :: Python :: 3.3
 Programming Language :: Python :: 3.4
 Topic :: Scientific/Engineering :: Mathematics
 Package Index Owner: glenflet
 Package Index Maintainer: glenfletautodeploy
 DOAP record: Equation1.2.xml