January 2009 - clpython-devel@common-lisp.net

[clpython-devel] CMUCL now also supported
by Willem Broekema 19 Jan '09

19 Jan '09

CLPython now also runs on CMUCL Snapshot 2009-01 (19E). This is in addition to the already supported implementations: Allegro CL, Lispworks and SBCL. Does anyone have a strong wish to have CLPython ported to yet another implementation? - Willem

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[clpython-devel] Creating executables from Python functions (SBCL)
by Willem Broekema 17 Jan '09

17 Jan '09

It's now possible to create standalone executables from Python functions with SBCL (and only tested on Mac OS X). It is implemented on top of SBCL's function save-lisp-and-die. Using this functionality is straightforward: just call the method _exe() of the function. Example: * (clpython:repl) Welcome to CLPython, an implementation of Python in Common Lisp. Running on: SBCL 1.0.20 REPL shortcuts: `:q' = quit, `:h' = help. >>> def f(): print "hello world" ... #<function f> >>> f() hello world None >>> f._exe() Building executable will terminate the Lisp session. Continue? (y or n) y Writing SBCL repl executable to: clpython-sbcl-20090105-f [undoing binding stack and other enclosing state... done] [saving current Lisp image into /Users/willem/dev/lisp/tmp/test-python/python/clpython-sbcl-20090105-f: writing 2872 bytes from the read-only space at 0x04000000 writing 1616 bytes from the static space at 0x04100000 writing 29245440 bytes from the dynamic space at 0x10000000 done] [willem test-python]$ ls -l ./python/clpython-sbcl-20090105-f -rwxr-xr-x 1 willem willem 29462540 Jan 17 18:50 ./python/clpython-sbcl-20090105-f [willem test-python]$ ./python/clpython-sbcl-20090105-f hello world [willem test-python]$ The executables have access to the command line arguments via "sys.argv". That should make it straightforward to write small utility programs. Here is an example program that takes input from the command line. Type it all in the repl: import sys def fact(n): if n <= 1: return 1 else: return n * fact(n-1) def main(): # read argument from command line, using 10 as default if len(sys.argv) > 0: n = int(sys.argv[0]) else: n = 10 print "fact(%s):" % n print fact(n) main._exe() This gives an executable that behaves like this: [willem test-python]$ ./python/clpython-sbcl-20090105-main fact(10): 3628800 [willem test-python]$ ./python/clpython-sbcl-20090105-main 20 fact(20): 2432902008176640000 - Willem

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[clpython-devel] Can not login to cvspublic.franz.com
by Al Bat 15 Jan '09

15 Jan '09

Hi ! Sorry for asking such a stupid question. Is there any other way to download the current snapshot of CLPython? I've tried *"cvs -d :pserver:cvspublic@cvspublic.franz.com:/cvs-public login"* with password "* cvspublic*", as it was recommended. However, as a result, I receive only*"Connection refused" *from the server. I'm not sure, whether the failure is at the server's side. Can anybody confirm that this *cvs* way works. And in the case if it doesn't, can anybody be so kind to give me a hint on any alternative way of getting CLPython. By the way, how big is it? Maybe, it can be sent via email? Thanks! Al

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[clpython-devel] Calling Python functions from Lisp [Re Franz thread: spr35431]
by Stuart C. Shapiro 09 Jan '09

09 Jan '09

I think that I have successfully installed CLPython. What I want to do is to call Python functions, defined in programs written by others, from Allegro Common Lisp. So here is a test Python program called test.py: ----------------------------- # A Python file to use to test clpython def test(): print "I am a Python function." return "I am done." print("The Python test file has been run.") ----------------------------- I loaded clpython, and did (note: this wasn't the first time I imported test, so test.fasl and test.pyc already existed.): ----------------------------- cl-user(3): (clpython:run "import test; test.test()") Warning: *import-recompiled-files* = #<equal hash-table with 0 entries> Warning: /net/projects/shapiro/clpython/test.fasl not in #<equal hash-table with 0 entries> ; Fast loading /net/projects/shapiro/clpython/test.fasl The Python test file has been run. Warning: *import-recompiled-files* = #<equal hash-table with 0 entries> Warning: /net/projects/shapiro/clpython/test.fasl not in #<equal hash-table with 0 entries> I am a Python function. "I am done." ----------------------------- First question: Why the Warning messages? How can I get rid of them? Notice that I can make use of the values returned by the Python function: ----------------------------- cl-user(4): (setf x (clpython:run "import test; test.test()")) Warning: *import-recompiled-files* = #<equal hash-table with 0 entries> Warning: /net/projects/shapiro/clpython/test.fasl not in #<equal hash-table with 0 entries> ; Fast loading /net/projects/shapiro/clpython/test.fasl The Python test file has been run. Warning: *import-recompiled-files* = #<equal hash-table with 0 entries> Warning: /net/projects/shapiro/clpython/test.fasl not in #<equal hash-table with 0 entries> I am a Python function. "I am done." cl-user(5): x "I am done." ----------------------------- What I'd really like to do now is to call test.test() as much as possible as though it were a Common Lisp function. One possible way is: ----------------------------- cl-user(6): (clpython:run "test.test()") Error: NameError: Variable `test' is unbound. [condition type: NameError] Restart actions (select using :continue): 0: Enter a Lisp value to use for `test'. 1: Return to Top Level (an "abort" restart). 2: Abort entirely from this (lisp) process. ----------------------------- But, the name of the function does not seem to survive from one call of clpython:run to another. Final question: How can I do this? stu -- Stuart C. Shapiro Professor, Department of Computer Science and Engineering University at Buffalo, The State University of New York 201 Bell Hall, Box 602000, Buffalo, NY 14260-2000, U.S.A. PHONE: 716-645-3180x125 FAX: 716-645-3464 shapiro(a)cse.buffalo.edu http://www.cse.buffalo.edu/~shapiro/

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