Classes in a class: how to access variables from one in another
Christian Heimes
lists at cheimes.de
Mon Oct 18 11:17:52 EDT 2010
Am 18.10.2010 16:35, schrieb fab at slick.airforce-one.org:
> So my way of coding it is the following:
>
> class zone(GtkDrawingArea):
>
> class systemOfCoordinates:
> self.xmin = -5
> self.xmax = 5
> self.ymin = -5
> self.ymax = 5
>
> class Curve:
> self.listOfPoints = ()
>
> def draw(self):
> pass
> # for each point in self.listOfPoints: draw this point
> # then draw the Bézier curve passing through these points
>
> class Point:
> def __init__(self, x, y):
> (self.x, self.y) = (x, y)
>
> def draw(self):
> # ... code for drawing a dot in the system of coordinates...
>
> def __init__(self): # for the zone object
> self.coord = self.systemOfCoordinates()
> self.listOfCurves = ( self.Curve() )
>
> def expose(self, widget, event):
> pass
> # for each curve of self.listOfCurves: draw it
Don't nest classes. Just don't. This might be a valid and good approach
in some programming languages but it's not Pythonic. Your code can
easily be implemented without nested classes.
Christian
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