Looping Over Widgets In Tkinter

here's the issue I'm thinking of: I have a number of similar widgets in the frame(e.g. Lables). I update them every iteration of the algorithm (using root.update() in the relevant

Solution 1:

Your consistant name scheme let you use the variable name to iterate through your variables:

for i inrange(1,n):
    label = getattr(self, "lab"+str(i))

You may also consider relying on Tkinter whom retain a tree structure of your widgets accessible through children widget attribute (a dictionary):

for child in frame.children.values():
    #do something to all children

And eventually add some filtering if your frame contains other widgets. For instance, to filter on classes of widgets:

for label in filter(lambda w:isinstance(w,Label), frame.children.itervalues()):
    #do something on labels

Note that children does not have any guarantee on order traversal. For such service, you may rely on geometry manager infos, ie pack_slaves or grid_slaves:

for child in frame.pack_slaves():
    #traverse in pack addition order#orfor child inreversed(frame.grid_slaves()):
    #traverse in grid addition order

Solution 2:

The easiest way is to store references to each widget in a list or dictionary rather than (or in addition to) scaler instance variables.