*** GMX Spamverdacht *** Re: [PyQt] ImportError: No module named
rasky at develer.com
Sun Apr 29 11:36:44 BST 2007
On 29/04/2007 6.25, Andreas Pakulat wrote:
> Right, the motivation for the Qt.py package is simply convenience for
> porting PyQt3 code. Which doesn't mean you should use it in new PyQt4
> programs. Using something like this creates enough convience while
> preserving a clean global namespace:
> from PyQt4 import QtCore,QtGui
> from PyQt4.QtGui import QWidget, QPushButton <other classes you use very often>
I strongly disagree.
Your suggestion creates gigantic import lines for absolutely no gain. It also
encourages inconsistency in the source code base (where some classes have a
QtNamespace prefix, and others don't) which is even WORSE and more confusing
than the problem you're trying to solve (which is actually a non-problem, as
I'm going to try to explain).
The clean namespace is preserved by the implicit namespace that Trolltech uses
(the 'Q' prefix in front of everything). If you call "QSomething" a class not
realated to Qt in your Qt program, you should be shot in a front anyway by
Which means that there is absolutely no need to clutter all your source code
base with all those "QtCore." "QtGui." in front of everything. I have *never*
been confused while reading a PyQt3 source code (that used the star-import); I
have never found myself thinking "oh damn, this QSomething here! I thought it
was Qt-realted but it is actually something else! They could have used an
explicit "qt." namespace instead!".
Being blind about this and thinking that "star-imports are bad no matter what"
is just shooting oneself in the foot. The "star-import is bad" coding-standard
rule shouldn't be taken literally (like any other coding-standard rule); if
you understand what it really *means*, you also understand that it's not
needed for PyQt.
As Phil said, it's a matter of taste in the end. But surely, I know I'm using
"from PyQt4.Qt import *" in all my new programs, and I know other people who
do that as well.
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