pyswip 0.1.3

PySWIP is a GPL'd Python - SWI-Prolog bridge which enables querying SWI-Prolog in your Python programs.

PySWIP includes both an (incomplete) SWI-Prolog foreign language interface and a utity class that makes it easy querying SWI-Python.
Since it uses SWI-Prolog as a shared library and ctypes to access it, PySWIP doesn't require compilation to be installed.

This version breaks the compatibility with previous versions.

Example:
>>> from pyswip.prolog import Prolog
>>> prolog = Prolog()
>>> prolog.assertz("father(michael,john)")
[{}]
>>> prolog.assertz("father(michael,gina)")
[{}]
>>> list(prolog.query("father(michael,X)"))
[{'X': 'john'}, {'X': 'gina'}]
>>> for soln in prolog.query("father(X,Y)"):
... print soln["X"], "is the father of", soln["Y"]
...
michael is the father of john
michael is the father of gina

Foreign Functions Example:

Since version 0.1.3 of PySWIP, it is possible to register a Python function as a Prolog predicate through SWI-Prolog's Foreign Function Interface.
Here's an example:

from pyswip.prolog import Prolog
from pyswip.easy import registerForeign, getAtomChars

def hello(t):
print "Hello,", getAtomChars(t)
return True
hello.arity = 1

registerForeign(hello)
prolog = Prolog()
prolog.assertz("father(michael,john)")
prolog.assertz("father(michael,gina)")
list(prolog.query("father(michael,X), hello(X)"))

Outputs:
Hello, john
Hello, gina