Creating class iterator

[jlm699]

Greetings friends. I'm trying to create an iterator to iterate over a database of messages. I defined an __iter__() and a next() function as such:
[code=python]import win32com.client as w32c
from win32com.client import constants

class DataBaseControl :
def __init__( self, passwd, database='path_ to_database' ):
# ... Initialization, etc...
self.view = self.db.GetView ( "$Inbox" )

def __iter__( self ):
self.currDoc = self.view.GetFi rstDocument()
return self.currDoc
def next( self ):
if not self.currDoc:
raise StopIteration
else:
self.currDoc = self.view.GetNe xtDocument( self.currDoc )
return self.currDoc[/code]

so now when I do[code=python]>>> from DBClass import DataBaseControl
>>> lb = DataBaseControl (my_passwd)
>>> lb
<DBClass.DataBa seControl instance at 0x01DC7FA8>
>>> for mail in lb:
... print mail.getItemVal ue("Subject")
...
Traceback (most recent call last):
File "<input>", line 1, in ?
TypeError: instance has no next() method
>>> for mail in lb:
... print mail
...
Traceback (most recent call last):
File "<input>", line 1, in ?
TypeError: instance has no next() method
>>> lb.next()
<COMObject GetNextDocument >
>>> lb.next().getIt emValue("Subjec t")
(u'Re: Fw: *IBM Confidential: Quality Issue (LS41) in Morgan Stanley ',)
>>> lb.next().getIt emValue("Subjec t")
(u'Re: Fw: 13wks shortage highlights -- memory shortage',)
>>> lb.next().getIt emValue("Subjec t")
(u'Fw: *IBM Confidential: Quality Issue (LS41) in Morgan Stanley ',)
>>> [/code]
so as you can see... I can access the next() method it's just not letting the iterator see it? I've never created an iterator before so I'm kinda lost as to why... any suggestions?

EDIT: * I have a generator that will work but I just was hoping to have something clean to do something like -- for mail_item in lb: *

[bvdet]

Greetings friends. I'm trying to create an iterator to iterate over a database of messages. I defined an __iter__() and a next() function as such:
[code=python]import win32com.client as w32c
from win32com.client import constants

class DataBaseControl :
def __init__( self, passwd, database='path_ to_database' ):
# ... Initialization, etc...
self.view = self.db.GetView ( "$Inbox" )

def __iter__( self ):
self.currDoc = self.view.GetFi rstDocument()
return self.currDoc
def next( self ):
if not self.currDoc:
raise StopIteration
else:
self.currDoc = self.view.GetNe xtDocument( self.currDoc )
return self.currDoc[/code]

so now when I do[code=python]>>> from DBClass import DataBaseControl
>>> lb = DataBaseControl (my_passwd)
>>> lb
<DBClass.DataBa seControl instance at 0x01DC7FA8>
>>> for mail in lb:
... print mail.getItemVal ue("Subject")
...
Traceback (most recent call last):
File "<input>", line 1, in ?
TypeError: instance has no next() method
>>> for mail in lb:
... print mail
...
Traceback (most recent call last):
File "<input>", line 1, in ?
TypeError: instance has no next() method
>>> lb.next()
<COMObject GetNextDocument >
>>> lb.next().getIt emValue("Subjec t")
(u'Re: Fw: *IBM Confidential: Quality Issue (LS41) in Morgan Stanley ',)
>>> lb.next().getIt emValue("Subjec t")
(u'Re: Fw: 13wks shortage highlights -- memory shortage',)
>>> lb.next().getIt emValue("Subjec t")
(u'Fw: *IBM Confidential: Quality Issue (LS41) in Morgan Stanley ',)
>>> [/code]
so as you can see... I can access the next() method it's just not letting the iterator see it? I've never created an iterator before so I'm kinda lost as to why... any suggestions?

EDIT: * I have a generator that will work but I just was hoping to have something clean to do something like -- for mail_item in lb: *

Create a list of documents in __init__().[code=Python]
self.docs = [self.view.GetFi rstDocument(),]
while True:
doc = GetNextDocument (self.docs[-1])
if doc:
self.docs.appen d()
else:
break

def __iter__(self):
for doc in self.docs:
yield doc[/code]I am not sure if it will work with your application.