[pypy-dev] PyPy newbie question: How to play with types

Noam Raphael noamraph at gmail.com
Fri Nov 18 13:32:28 CET 2005

Ok, I just tried to add the "frozen" multimethod. I managed to make it
work as a one-argument function. I had to add a line to the
flow/operation.py, to make it work:
    ('frozen',          None),

I then tried to make it a function which gets two arguments, the
second one is optional (so you can call frozen(x), which means
x.__frozen__(), and also frozen(x, y), which means x.__frozen__(y).) I
replaced the "1" with "2" in the line in baseobjspace.py, and it
didn't work - it said:
Traceback (most recent call last):
  File "pypy/bin/py.py", line 205, in ?
  File "pypy/bin/py.py", line 81, in main_
    space = make_objspace(Options)
  File "pypy/bin/py.py", line 58, in make_objspace
    from pypy.objspace.std import Space
  File "/home/noam/sand/pypy/pypy/objspace/std/__init__.py", line 1, in ?
    from objspace import StdObjSpace
  File "/home/noam/sand/pypy/pypy/objspace/std/objspace.py", line 11, in ?
    from pypy.objspace.descroperation import DescrOperation
  File "/home/noam/sand/pypy/pypy/objspace/descroperation.py", line 573, in ?
    raise Exception, "missing def for operation%s" % _name
Exception: missing def for operationfrozen

Another thing that I had to find out: I had to copy the "py" directory
from the bz2 distribution in order to make pypy work (I checked out
from subversion). I didn't see it mentioned in the subversion

I will probably have more questions in the future, but that's it for now...

Thanks again,

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