Parser and interpreter for the functional programming language yaffel.

You can install yaffel-py from sources using distutils. First download the sources:

# git clone https://github.com/kyouko-taiga/yaffel-py.git

Then navigate to the repository directory and run setup.py:

# cd yaffel-py
# python setup.py install

The quickest way to test yaffel-py is to use the command line tool. Type yaffel in your terminal to start a command-line interpreter. Then simply type yaffel-expressions and get their result as they are evaluated. Alternatively, you can type yappel -e "some expression" to evaluate an expression without loading the shell.

To use yaffel-py in your own code, simply import the parser among with your other dependencies and call parse to parse a yaffel expression:

import yaffel.parser
...
result = yaffel.parser.parse('5 * (y + x) for x=4, y=7')

The result will be a tuple whose first element is the type of the parsed expression and second element is its value.