Lisp Interface

EXAMPLES:

sage: lisp.eval('(* 4 5)')
'20'
sage: a = lisp(3); b = lisp(5)
sage: a + b
8
sage: a * b
15
sage: a / b
3/5
sage: a - b
-2
sage: a.sin()
0.14112
sage: b.cos()
0.2836622
sage: a.exp()
20.085537
sage: lisp.eval('(+ %s %s)'%(a.name(), b.name()))
'8'

One can define functions and the interface supports object-oriented notation for calling them:

sage: lisp.eval('(defun factorial (n) (if (= n 1) 1 (* n (factorial (- n 1)))))')
'FACTORIAL'
sage: lisp('(factorial 10)')
3628800
sage: lisp(10).factorial()
3628800
sage: a = lisp(17)
sage: a.factorial()
355687428096000

AUTHORS:

– William Stein (first version) – William Stein (2007-06-20): significant improvements.

class sage.interfaces.lisp.Lisp(maxread=None, script_subdirectory=None, logfile=None, server=None, server_tmpdir=None)

Bases: sage.interfaces.expect.Expect

EXAMPLES:

sage: lisp == loads(dumps(lisp))
True

console()

Spawn a new Lisp command-line session.

EXAMPLES:

sage: lisp.console() #not tested
ECL (Embeddable Common-Lisp) ...
Copyright (C) 1984 Taiichi Yuasa and Masami Hagiya
Copyright (C) 1993 Giuseppe Attardi
Copyright (C) 2000 Juan J. Garcia-Ripoll
ECL is free software, and you are welcome to redistribute it
under certain conditions; see file 'Copyright' for details.
Type :h for Help.  Top level.
...

eval(code, strip=True, **kwds)

EXAMPLES:

sage: lisp.eval('(+ 2 2)')
'4'

function_call(function, args=None, kwds=None)

Calls the Lisp function with given args and kwds. For Lisp functions, the kwds are ignored.

EXAMPLES:

sage: lisp.function_call('sin', ['2'])
0.9092974
sage: lisp.sin(2)
0.9092974

get(var)

EXAMPLES:

sage: lisp.set('x', '2')
sage: lisp.get('x')
'2'

help(command)

EXAMPLES:

sage: lisp.help('setq')
Traceback (most recent call last):
...
NotImplementedError

kill(var)

EXAMPLES:

sage: lisp.kill('x')
Traceback (most recent call last):
...
NotImplementedError

set(var, value)

Set the variable var to the given value.

EXAMPLES:

sage: lisp.set('x', '2')
sage: lisp.get('x')
'2'

version()

Returns the version of Lisp being used.

EXAMPLES:

sage: lisp.version()
'Version information is given by lisp.console().'

class sage.interfaces.lisp.LispElement(parent, value, is_name=False, name=None)

Bases: sage.structure.element.RingElement, sage.interfaces.expect.ExpectElement

class sage.interfaces.lisp.LispFunction(parent, name)

Bases: sage.interfaces.expect.ExpectFunction

class sage.interfaces.lisp.LispFunctionElement(obj, name)

Bases: sage.interfaces.expect.FunctionElement

sage.interfaces.lisp.is_LispElement(x)

EXAMPLES:

sage: from sage.interfaces.lisp import is_LispElement
sage: is_LispElement(lisp(2))
True
sage: is_LispElement(2)
False

sage.interfaces.lisp.lisp_console()

Spawn a new Lisp command-line session.

EXAMPLES:

sage: lisp.console() #not tested
ECL (Embeddable Common-Lisp) ...
Copyright (C) 1984 Taiichi Yuasa and Masami Hagiya
Copyright (C) 1993 Giuseppe Attardi
Copyright (C) 2000 Juan J. Garcia-Ripoll
ECL is free software, and you are welcome to redistribute it
under certain conditions; see file 'Copyright' for details.
Type :h for Help.  Top level.
...

sage.interfaces.lisp.reduce_load_Lisp()

EXAMPLES:

sage: from sage.interfaces.lisp import reduce_load_Lisp
sage: reduce_load_Lisp()
Lisp Interpreter