Question about a single underscore.

[Steven W. Orr]

On Thursday, Feb 1st 2007 at 09:25 -0800, quoth Bart Ogryczak:

=>On Feb 1, 5:52 pm, "Steven W. Orr" <ste... at syslang.net> wrote:
=>> I saw this and tried to use it:
=>>
=>> ------------------><8------------------- const.py-------------
=>[...]
=>> sys.modules[__name__]=_const()
=>
=>__name__ == 'const', so you´re actually doing
=>const = _const()

So how can I say this in const.py?

class _const:
    class ConstError(TypeError): pass
    def __setattr__(self,name,value):
        if self.__dict__.has_key(name):
            raise self.ConstError, "Can't rebind const(%s)"%name
        self.__dict__[name]=value

    def __init__(self):
        sys.modules[self]=_const()

import sys

to cause a different instantiation a la

foo	= _const()

The goal would be to create different instances of consts.

I did try the previous suggestion

irrational_consts = _const()

but I got

>>> import const
>>> iii=_const()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
NameError: name '_const' is not defined
*>>> iii=const()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: _const instance has no __call__ method

------------
For ref:

class _const:
    class ConstError(TypeError): pass
    def __setattr__(self,name,value):
        if self.__dict__.has_key(name):
            raise self.ConstError, "Can't rebind const(%s)"%name
        self.__dict__[name]=value

import sys
sys.modules[__name__]=_const()



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steveo at syslang.net