[python-win32] cannot create 'NoneType' instances

[Arun Kumar]

The problem appeared to have been with another error that I saw only 
when I restarted the machine and python. When I first try to import this 
module 'import speech' it fails with the error below. Subsequent calls 
to 'import speech' fail with the 'NoneType' error.
File "C:\Python25\Lib\site-packages\win32com\client\gencache.py", line 
554, in AddModuleToCache? 
<http://code.google.com/p/pyspeech/w/edit/AddModuleToCache>

    dict = mod.CLSIDToClassMap 

AttributeError? 
<http://code.google.com/p/pyspeech/w/edit/AttributeError>: 'module' 
object has no attribute 'CLSIDToClassMap'

This error was being thrown up in the gencache.EnsureModule() call. I 
found some posts about deleting the gen_py directory, and retrying the 
import and it seems to be working now.

Thanks,
Arun

Larry Bates wrote:
> Arun Kumar wrote:
>> hi,
>> I'm new to python as well as pywin. I'm having trouble with the 
>> following code:
>>
>> _ListenerBase = win32com.client.getevents("SAPI.SpSharedRecoContext")
>> class _ListenerCallback(_ListenerBase):
>>
>>    """Created to fire events upon speech recognition.  Instances of this
>>    class automatically die when their listener loses a reference to
>>    its grammar.  TODO: we may need to call self.close() to release the
>>    COM object, and we should probably make goaway() a method of self
>>    instead of letting people do it for us.
>>    """
>>
>>    def __init__(self, oobj, listener, callback):
>>        _ListenerBase.__init__(self, oobj)
>>        self._listener = listener
>>        self._callback = callback
>>
>>    def OnRecognition(self, _1, _2, _3, Result):
>>        # When our listener stops listening, it's supposed to kill this
>>        # object.  But COM can be funky, and we may have to call close()
>>        # before the object will die.
>>        if self._listener and not self._listener.islistening():
>>            self.close()
>>            self._listener = None
>>
>>        if self._callback and self._listener:
>>            newResult = win32com.client.Dispatch(Result)
>>            phrase = newResult.PhraseInfo.GetText()
>>            self._callback(phrase, self._listener)
>>
>> The error I get is:
>> class _ListenerCallback(_ListenerBase):
>> TypeError: Error when calling the metaclass bases
>>    cannot create 'NoneType' instances
>>
>> I went through the list archives and found a couple of messages 
>> regarding this, so I tried the following in an interactive shell:
>>  >>> lb = win32com.client.getevents("SAPI.SpSharedRecoContext")
>>  >>> type(lb)
>> <type 'NoneType'>
>>
>> Can anyone point me in the right direction? Why is getevents 
>> returning a NoneType? How can I fix it?
>>
>> Thanks,
>> Arun
>
> Sounds like oobj is None when you try to call the __init__ method of
> _ListenerBase.
>
> -Larry
>
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