On 4 Des, 07:24, "Alf P. Steinbach" <al...@start.no> wrote:
> And this leads to hierarchical code, which would be nice to indicate by > indenting, but oops, indenting in Python is syntactically significant... I've seen this with OpenGL as well. Intendation between glBegin and glEnd can be achieved with a context manager that calls glBegin in __enter__ and glEnd in __exit__. Same thing for glColor* and other functions that set state attributes: call glPushAttrib in __enter__ (before setting new state) and glPopAttrib in __exit__. Context managers (i.e. with statement) should be used for this, as it guards against havoc from exceptions. If a context manager is used to call glPushAttrib and glPopAttrib, a raised exception cannot leave OpenGL's colour bit and colour stack in an undefined state by skipping glPopAttrib. The with statement is not just a pritty printer for your code. I don't see anything wrong with using context managers for tkinter as well. But personally I prefer to design GUIs using tools like wxFormBuilder, GLADE or QtDesigner. -- http://mail.python.org/mailman/listinfo/python-list
