[pywin32-bugs] [ pywin32-Bugs-3314345 ] dde module initialization failing

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Bugs item #3314345, was opened at 2011-06-09 11:00
Message generated for change (Comment added) made by kxroberto
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Category: pythonwin
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: ajs (ajssf)
Assigned to: Nobody/Anonymous (nobody)
Summary: dde module initialization failing

Initial Comment:
If I import the dde module after importing the win32ui module, the error generated tells me to import the win32ui module.

I get the same behaviour for builds 215 and 216

Below is a copy of a real session

    C:\>c:\Python31\python.exe
    Python 3.1.3 (r313:86834, Nov 27 2010, 17:20:37) [MSC v.1500 64 bit (AMD64)] on win32
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import win32ui
    >>> import dde
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    ImportError: This must be an MFC application - try loading win32ui first
    >>> win32ui.GetApp()
    object 'PyCWinApp' - assoc is 000000000247D150, vi=<None>, notify=0,ch/u=0/0
    >>> 

Looking at the source code, the import error from the dde module appears to be generated because there is no CWinApp being created
by the win32ui import, but the call to win32ui.GetApp() seems to show that there is one created.



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Comment By: kxroberto (kxroberto)
Date: 2011-11-06 13:33

Message:
I have the same problem "ImportError: This must be an MFC application - try
loading win32ui first" with py2.6 / pywin 216 ,  when the application
starts through python.exe or pythonw.exe.

The problem is not in the IDE when started through Pythonwin.exe !

When I start the IDE through python(w).exe and the script below, then the
problem is there in the IDE as well.

Nothing changes when I copy&use python(w).exe  next to Pythonwin.exe (and
the mfc dll's there), or when I copy&use Pythonwin.exe at C:\Python :  
Pythonwin.exe always allows dde. python(w).exe not.

What does Pythonwin.exe do/have special? What can be done to get dde
loading without Pythonwin.exe?


--
#######################################################################################
## 
## Fires up the PythonWin framework via normal python(w).exe (1.5.2
tested)
## 
#######################################################################################

import sys, win32ui, win32api, win32con
wc=win32con

# store original console stdout/in 
constdout=sys.constdout=sys.stdout
constdin=sys.constdin=sys.stdin

def do(*paths):
    import pywin.framework.startup
    from pywin.framework.intpyapp import thisApp
    thisApp.MakeExistingDDEConnection = lambda:None # we can have more
Pythonwin's this way
    app=thisApp
    app.InitInstance()
    try: win32api.SetConsoleTitle('PyWin Console')
    except: pass
    #for path in args:
    #    app.OpenDocumentFile(path)
    app.Run()

def do2():
    import pywin.framework.startup
    from pywin.framework.intpyapp import thisApp
    thisApp.MakeExistingDDEConnection = lambda:None        
    app=self=thisApp
    win32ui.LoadStdProfileSettings=lambda x:None
    app.InitInstance()
    app.frame.ShowWindow(wc.SW_SHOW)
    try: win32api.SetConsoleTitle('PyWin Console')
    except: pass
    #app.OpenDocumentFile("hello.py")
    #app.Run()

def do3():
    import thread
    thread.start_new_thread( do2, () )

if __name__=='__main__' :
    try: del sys.argv[0] # prevent this script from being loaded into the
editor
    except: pass
    do()


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Comment By: chrisparks (chrisparks)
Date: 2011-10-19 11:10

Message:
Thanks for the tip jonvspython, I could not get dde to import from the
bundle that came with pythonxy 2.7.2 (build 216 of pywin32).  

Dependency walker showed MSVCR90.DLL was missing from the distribution.  I
installed the missing DLL but dde still failed to import.  

I then installed build 214 of pywin32 and it is now working.  Something
broke dde on the way to build 216.


----------------------------------------------------------------------

Comment By: jon vs. python (jonvspython)
Date: 2011-07-06 03:33

Message:
I had the same problem with Python 2.7.2 (default, Jun 12 2011, 15:08:59)
[MSC v.1500 32 bit (Intel)] on win32 and build 216.

The problem did not arise with Python 2.7.2 (default, Jun 12 2011,
15:08:59) [MSC v.1500 32 bit (Intel)] on win32 and build 214, though.

Hope it helps.

----------------------------------------------------------------------

Comment By: Mark Hammond (mhammond)
Date: 2011-06-09 16:27

Message:
I'll fix the message later, but I don't think I will be able to fix the
behaviour.

----------------------------------------------------------------------

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