Re: Special method names problem?

__int__ is not used in Jython (2.1) for coersion
to ints.  Instead, Jython calls the __tojava__ method
to convert the object to a java.lang.Integer.  This
works:

>>> import java,org
>>> class C:
...   v=0
...   def __init__(self,value):
...     self.v=value
...   def __int__(self):
...     return int(self.v)
...   def __tojava__(self,t):
...     if t is java.lang.Integer:
...       return self.__int__()
...     return org.python.core.Py.NoConversion
...
>>> c=C(33)
>>> for i in range(c):
...   print i
...
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32


Eugene Rosenzweig wrote:
> Hi,
>
> What I have in jython is:
>
>  >>> class C:
> ...     v=0
> ...     def __init__(self,val):
> ...             self.v=val
> ...     def __int__(self):
> ...             return int(self.v)
> ...     def __chr__(self):
> ...             return chr(self.v)
>  >>> c=C(33)
>  >>> print int(c)
> 33
>  >>> print chr(c)
> Traceback (innermost last):
>  File "<console>", line 1, in ?
> TypeError: chr(): 1st arg can't be coerced to int
>  >>> for i in range(c):
> ...     print i
> ...
> Traceback (innermost last):
>  File "<console>", line 1, in ?
> TypeError: range(): 1st arg can't be coerced to int
>
> In CPython these statements don't present any problem.
>
> I am quite new to Python and jython.
>
> Eugene.
>
> PS I have looked at the language reference and __chr__ doesnt appear to 
> be in it however removing it from the class definition doesn't alter the 
> results in any way.
>
>
>
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