I am struggling to setup pymunk on my Ubuntu 16.04. I am using virtualenv, I have Python 3.5.2, pymunk 5.3.0 and cffi 1.11.0 installed.
I tried a very simple code first; basically, I created an empty Space and called step on it and everything worked smoothly. However, when I try to visualize it and create DrawOptions instance, I get strange errors, which I can't decipher. Also, I tried matplotlib_util and pygame_util, but both failed to create DrawOptions.
This is the code snippet I used:
import pymunk
import pyglet
import pymunk.pyglet_util
s = pymunk.Space()
options = pymunk.pyglet_util.DrawOptions()
s.debug_draw(options)
# s.step(0.02)
This is the output I get:
Loading chipmunk for Linux (64bit) [/home/wm/.virtualenvs/cv/lib/python3.5/site-packages/pymunk/libchipmunk.so]
Traceback (most recent call last):
File "/home/wm/.virtualenvs/cv/lib/python3.5/site-packages/cffi-1.11.0-py3.5-linux-x86_64.egg/cffi/api.py", line 167, in _typeof
result = self._parsed_types[cdecl]
KeyError: 'typedef void (*cpSpaceDebugDrawCircleImpl)(cpVect pos, cpFloat angle, cpFloat radius, cpSpaceDebugColor outlineColor, cpSpaceDebugColor fillColor, cpDataPointer data)'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/wm/.virtualenvs/cv/lib/python3.5/site-packages/cffi-1.11.0-py3.5-linux-x86_64.egg/cffi/cparser.py", line 276, in _parse
ast = _get_parser().parse(fullcsource)
File "/home/wm/.virtualenvs/cv/lib/python3.5/site-packages/pycparser/c_parser.py", line 152, in parse
debug=debuglevel)
File "/home/wm/.virtualenvs/cv/lib/python3.5/site-packages/pycparser/ply/yacc.py", line 331, in parse
return self.parseopt_notrack(input, lexer, debug, tracking, tokenfunc)
File "/home/wm/.virtualenvs/cv/lib/python3.5/site-packages/pycparser/ply/yacc.py", line 1199, in parseopt_notrack
tok = call_errorfunc(self.errorfunc, errtoken, self)
File "/home/wm/.virtualenvs/cv/lib/python3.5/site-packages/pycparser/ply/yacc.py", line 193, in call_errorfunc
r = errorfunc(token)
File "/home/wm/.virtualenvs/cv/lib/python3.5/site-packages/pycparser/c_parser.py", line 1761, in p_error
column=self.clex.find_tok_column(p)))
File "/home/wm/.virtualenvs/cv/lib/python3.5/site-packages/pycparser/plyparser.py", line 66, in _parse_error
raise ParseError("%s: %s" % (coord, msg))
pycparser.plyparser.ParseError: <cdef source string>:2:16: before: cpSpaceDebugDrawCircleImpl
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "pmtest2.py", line 5, in <module>
options = pymunk.pyglet_util.DrawOptions()
File "/home/wm/.virtualenvs/cv/lib/python3.5/site-packages/pymunk/pyglet_util.py", line 89, in __init__
super(DrawOptions, self).__init__()
File "/home/wm/.virtualenvs/cv/lib/python3.5/site-packages/pymunk/space_debug_draw_options.py", line 51, in __init__
@ffi.callback("typedef void (*cpSpaceDebugDrawCircleImpl)"
File "/home/wm/.virtualenvs/cv/lib/python3.5/site-packages/cffi-1.11.0-py3.5-linux-x86_64.egg/cffi/api.py", line 375, in callback
cdecl = self._typeof(cdecl, consider_function_as_funcptr=True)
File "/home/wm/.virtualenvs/cv/lib/python3.5/site-packages/cffi-1.11.0-py3.5-linux-x86_64.egg/cffi/api.py", line 170, in _typeof
result = self._typeof_locked(cdecl)
File "/home/wm/.virtualenvs/cv/lib/python3.5/site-packages/cffi-1.11.0-py3.5-linux-x86_64.egg/cffi/api.py", line 155, in _typeof_locked
type = self._parser.parse_type(cdecl)
File "/home/wm/.virtualenvs/cv/lib/python3.5/site-packages/cffi-1.11.0-py3.5-linux-x86_64.egg/cffi/cparser.py", line 476, in parse_type
return self.parse_type_and_quals(cdecl)[0]
File "/home/wm/.virtualenvs/cv/lib/python3.5/site-packages/cffi-1.11.0-py3.5-linux-x86_64.egg/cffi/cparser.py", line 479, in parse_type_and_quals
ast, macros = self._parse('void __dummy(\n%s\n);' % cdecl)[:2]
File "/home/wm/.virtualenvs/cv/lib/python3.5/site-packages/cffi-1.11.0-py3.5-linux-x86_64.egg/cffi/cparser.py", line 278, in _parse
self.convert_pycparser_error(e, csource)
File "/home/wm/.virtualenvs/cv/lib/python3.5/site-packages/cffi-1.11.0-py3.5-linux-x86_64.egg/cffi/cparser.py", line 307, in convert_pycparser_error
raise CDefError(msg)
cffi.error.CDefError: cannot parse "typedef void (*cpSpaceDebugDrawCircleImpl)(cpVect pos, cpFloat angle, cpFloat radius, cpSpaceDebugColor outlineColor, cpSpaceDebugColor fillColor, cpDataPointer data)"
<cdef source string>:2:16: before: cpSpaceDebugDrawCircleImpl
What do you think is causing that? Is that the python version I use, or maybe cffi compilation is faulty?
This error happens because there was a new version of pycparser (which is used by cffi) released, and that version breaks pymunk 5.3.0 and earlier versions. Yesterday I made a new release of Pymunk, 5.3.1 with a workaround for the problem. If you try to update your Pymunk version to 5.3.1 it should work.