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the dao to programming, lisp meets prolog in python.

Project description

This is Dao 0.7.4

What would happen when lisp meets prolog in python?

Dinpy arises!

Dao is the new generation programming system implemented by a functional logic solver,
unifying code with data, grammar with program, logic with functional, compiling with running.

How to use Dao?

!!! This readme in ReStructureText format does not works in pypi.
What's wrong with this(see dao\readme and dao\
I don't find the reason even after reading pypi tutorial, google and trying a lot ways.
If any one know please show me how to fix it ( and thanks a lot.

See the "get start" in the <> to get started with dao and dinpy.
See <> for document about dao and dinpy.
See the tests, and you'll get some information about the interface and use cases.

Have a look at running Dinpy in interactive mode in the python shell below::

>>> from dao.dinpy import *

>>> i<<0
>>> quote(i/i+i*1)
>>> let(i<<1).do[prin(i)]
>>> loop(3)[ prin(i), ++i ]
0 1 2
>>> loop [ prin(i), --i]. until(i==0)
3 2 1
>>> when(i!=0).loop[ prin(i), --i]
3 2 1
>>> loop [ prin(i), ++i, iff(i==3) .do[exit] ]
0 1 2
>>> each(i)[0:3].loop[prin(i)]
0 1 2
>>> i << 0
>>> loop[ println('outer loop'), loop[ prin('inner loop: '), println(i), ++i, iff(i==3).do[ exit*2 >> 'exit from inner' ] ] ]
outer loop
inner loop: 0
inner loop: 1
inner loop: 2
'exit from inner'
>>> fun.f1(x) == [x+x]
>>> f1(2)
>>> letr (f2 << fun(x)[ iff(x<1).do[x].els[f2(x-1)]]) .do [f2(3)]

What's new in dao 0.7.4?

*Release date: 2011-11-10

* new in code:
* quasiquote, unquote, unquote_slicing is implemented.
* directly evaluate sexpression in solver
* some builtins for define, set and get global, outer and local var
* lisp style macro: expand and eval on UserMacro

See the file "news.txt" for what's new in all releases.

Download and install

You need python 2.6 or higher version to install and run dao. Dao is not tested with python 3.x.

You can download and install dao from pypi with these method:

* find the place of daot from pypi, download the tarball of daot from <>,unextract it to a single folder, enter the folder in the shell and execute the command::

python install

* install by easy_install through the internet directly, with the shell command::

easy_install dao

* install by easy_install through the internet directly, with the shell command::

pip install dao


See <> for document about dao and dinpy.

See <> for wiki about dao and dinpy.

Some old informations can be reached from <>.

Web sites

pypi distribution and document:

the project's repository is on github <>.

dao groups on google: Group name: daot, Group home page:, Group email address:

some old information and related stuff can be reached at <>.

google+ pages for news on dao:

Come to visit us!


dao use the nose test framework, the code in dao is tested with many tests.

Bug reports

To report or search for bugs, please goto <>, or email to

The source repository is on <>.

Platform notes

Dao is developed and tested on Windows XP, Python 2.6.6.

License information

copyright (c) 2011-2013 Caoxingming(Simeon Chaos, email:

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU Affero General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <>.

This software is released under GNU General Public License version 3.
see license.txt

See the file "license.txt" for information on the history of this
software, terms & conditions for usage, and a DISCLAIMER OF ALL

This dao distribution contains GNU General Public Licensed (GPLed) code.

All trademarks referenced herein are property of their respective holders.

That's all, folks!

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