Re: wxPython problem

[Stef Mientki]

Peter Anderson wrote:

I am trying to teach myself how to program in Python and use wxPython
for GUIs. I am using PyScripter, IDLE and EditPlus as my IDEs. I have
experienced an odd problem where I run a script once and it runs fine.
Run it again and I get an error and the script fails.

If the script is run directly from Python ('Run' from Windows
Explorer) or from EditPlus (in which I have a "user-defined tool"
which calls C:\Python25\pyt honw.exe with the parameter of $(FileName))
then there is *never* any error, no matter how many times the script
is run.

Close down PyScripter or IDLE and then start either up again, load the
script and run it - it runs fine. Run it again and it fails. It seems
like something is already set in memory and cant be re-set (my lack of
knowledge is showing here :-( ).

In PyScripter, you should run wxPython in the plain remote machine (not
the wxPython remote),
and you should set "reset before run flag" or reset the remote machine
each time yourself.

cheers,
Stef

More details are shown below. Any help or hints would be greatly
appreciated.

Regards,
Peter
RUNNING SIMPLE.PY (AND OTHER SCRIPTS USING WXPYTHON) FROM PYSCRIPTER I
GET THE FOLLOWING ERROR MESSAGE:

PyNoAppError: The wx.App object must be created first!

PyScripter loads a module (I presume from wxPython) called _windows.py
and highlights a particular line in red and displays the error message
from above. I have Googled the error message but the results have not
helped.
LISTING FOR SIMPLE.PY

#!/usr/bin/python

# simple.py

import wx

app = wx.App()

frame = wx.Frame(None, -1, 'simple.py')
frame.Show()

app.MainLoop()
EXERPT FROM _WINDOWS.PY - PYSCRIPTER HIGHLIGHTS SECOND LAST LINE

class Frame(TopLevelW indow):
"""Proxy of C++ Frame class"""
thisown = property(lambda x: x.this.own(), lambda x, v: x.this.own(v),
doc='The membership flag')
__repr__ = _swig_repr
def __init__(self, *args, **kwargs):
"""
__init__(self, Window parent, int id=-1, String title=EmptyStri ng,
Point pos=DefaultPosi tion, Size size=DefaultSiz e,
long style=DEFAULT_F RAME_STYLE, String name=FrameNameS tr) -Frame
"""

# The following line is highlighted as where the error occures

_windows_.Frame _swiginit(self, _windows_.new_F rame(*args, **kwargs))
self._setOORInf o(self)
RUNNING THE SIMPLE.PY SCRIPT FROM WITHIN IDLE PRODUCES THE FOLLOWING
ERROE MESSAGE:

Traceback (most recent call last):
File "C:\Documen ts and Settings\Peter\ My Documents\Dev\P ython\WxPython
Tutorial\absolu te.py", line 28, in <module>
Absolute(None, -1, '')
File "C:\Documen ts and Settings\Peter\ My Documents\Dev\P ython\WxPython
Tutorial\absolu te.py", line 9, in __init__
wx.Frame.__init __(self, parent, id, title, size=(250, 180))
File
"C:\Python25\Li b\site-packages\wx-2.8-msw-unicode\wx\_win dows.py",
line 505, in __init__
_windows_.Frame _swiginit(self, _windows_.new_F rame(*args, **kwargs))
PyNoAppError: The wx.App object must be created first!