Re: python and COM
Brian Blais wrote:
> Hello,
>
> I am trying to communicate to a Reuters feed using Python, using a
> particular set of libraries called the Adfin Real Time library. I have
> VB code, and am trying to port it to python, and admit I really do not
> understand COM objects and being a Linux guy mainly, I don't use VB at
> all. I've had some marginal success, but am coming up empty when it
> comes to setting up callbacks.
>
> For example, this works:
>
> import win32com.client
> import time
>
> symb='GOOG.O'
>
> mylist=win32com.client.Dispatch('AdfinXRTLib.AdxRtList')
>
> mylist.Source="IDN_RDF"
> mylist.RegisterItems(symb,"ASK")
> mylist.StartUpdates(4) # Mode Image
>
> while mylist.ItemStatus(symb):
> pass
>
> for i in range(100):
> m=mylist.Value(symb,"ASK")
> print m
> time.sleep(2)
>
>
> but to get it to automatically updated quotes, in VB they do something like
>
> #
> Public Class Form1
> # Dimension a Public Real Time list object that is capable of handling
> events
> # note from me: not sure what this line does really
> Dim WithEvents AdxList As New AdfinXRTLib.AdxRTList
>
> Public Sub AdxList_OnUpdate( ) Handles
> AdxList.OnUpdate
>
> do stuff with the updated data
>
> End Sub
>
> Private Sub Button1_Click()
>
> do stuff with button click
> End Sub
> End Class
> #
>
> It seems as if the important part is the "Handles AdxList.OnUpdate",
> which I assume is basically saying "call me when AdxList.OnUpdate is
> called". I have no idea how to get this to point to a python function,
> so I can make the AdxList.OnUpdate call python code.
>
> Is there a tutorial somewhere about this stuff, or is there a proper
> place to ask such questions?
>
>
> thanks,
>
>
> Brian Blais
>
It looks like you are correct. This is a callback function that gets
called when the update occurs. The only coverage of this I've found is
in "Python Programming on Win32" but it is rather brief even there. I
have not any event driven callbacks, so I can't help all that much.
Normally you define a Python class that has methods that ADxList.OnUpdate
is expecting to be able to call. Then depending on implementation you
either call it with an instance of that class or you may have to wrap
the instance in a COM IDispatch object by calling win32com.server.util.wrap()
around an instance of the function. Sorry I can't be more helpful.
-Larry
--
http://mail.python.org/mailman/listinfo/python-list
Re: python and COM
On Apr 27, 2:50 pm, Brian Blais <[EMAIL PROTECTED]> wrote:
> Hello,
>
> I am trying to communicate to a Reuters feed using Python, using a particular
> set of
> libraries called the Adfin Real Time library. I have VB code, and am trying
> to port
> it to python, and admit I really do not understand COM objects and being a
> Linux guy
> mainly, I don't use VB at all. I've had some marginal success, but am coming
> up
> empty when it comes to setting up callbacks.
>
> For example, this works:
>
> import win32com.client
> import time
>
> symb='GOOG.O'
>
> mylist=win32com.client.Dispatch('AdfinXRTLib.AdxRtList')
>
> mylist.Source="IDN_RDF"
> mylist.RegisterItems(symb,"ASK")
> mylist.StartUpdates(4) # Mode Image
>
> while mylist.ItemStatus(symb):
> pass
>
> for i in range(100):
> m=mylist.Value(symb,"ASK")
> print m
> time.sleep(2)
>
> but to get it to automatically updated quotes, in VB they do something like
>
> #
> Public Class Form1
># Dimension a Public Real Time list object that is capable of handling
> events
># note from me: not sure what this line does really
>Dim WithEvents AdxList As New AdfinXRTLib.AdxRTList
>
>Public Sub AdxList_OnUpdate( ) Handles AdxList.OnUpdate
>
> do stuff with the updated data
>
>End Sub
>
>Private Sub Button1_Click()
>
> do stuff with button click
>End Sub
> End Class
> #
>
> It seems as if the important part is the "Handles AdxList.OnUpdate", which I
> assume
> is basically saying "call me when AdxList.OnUpdate is called". I have no
> idea how to
> get this to point to a python function, so I can make the AdxList.OnUpdate
> call
> python code.
>
> Is there a tutorial somewhere about this stuff, or is there a proper place to
> ask
> such questions?
>
> thanks,
>
> Brian Blais
>
> --
> -
>
> [EMAIL PROTECTED]
> http://web.bryant.edu/~bblais
I found some info on Python, VB, and COM. Check out the links below:
http://vb2py.sourceforge.net/
http://mail.python.org/pipermail/python-list/2005-July/332502.html
http://www.oreilly.com/catalog/pythonwin32/chapter/ch12.html
http://mail.python.org/pipermail/melbourne-pug/2006-April/000132.html
Not sure if those will help, but they might give you some food for
thought.
Mike
--
http://mail.python.org/mailman/listinfo/python-list
python and COM
Hello,
I am trying to communicate to a Reuters feed using Python, using a particular
set of
libraries called the Adfin Real Time library. I have VB code, and am trying to
port
it to python, and admit I really do not understand COM objects and being a
Linux guy
mainly, I don't use VB at all. I've had some marginal success, but am coming
up
empty when it comes to setting up callbacks.
For example, this works:
import win32com.client
import time
symb='GOOG.O'
mylist=win32com.client.Dispatch('AdfinXRTLib.AdxRtList')
mylist.Source="IDN_RDF"
mylist.RegisterItems(symb,"ASK")
mylist.StartUpdates(4) # Mode Image
while mylist.ItemStatus(symb):
pass
for i in range(100):
m=mylist.Value(symb,"ASK")
print m
time.sleep(2)
but to get it to automatically updated quotes, in VB they do something like
#
Public Class Form1
# Dimension a Public Real Time list object that is capable of handling events
# note from me: not sure what this line does really
Dim WithEvents AdxList As New AdfinXRTLib.AdxRTList
Public Sub AdxList_OnUpdate( ) Handles AdxList.OnUpdate
do stuff with the updated data
End Sub
Private Sub Button1_Click()
do stuff with button click
End Sub
End Class
#
It seems as if the important part is the "Handles AdxList.OnUpdate", which I
assume
is basically saying "call me when AdxList.OnUpdate is called". I have no idea
how to
get this to point to a python function, so I can make the AdxList.OnUpdate call
python code.
Is there a tutorial somewhere about this stuff, or is there a proper place to
ask
such questions?
thanks,
Brian Blais
--
-
[EMAIL PROTECTED]
http://web.bryant.edu/~bblais
--
http://mail.python.org/mailman/listinfo/python-list
