How to write Strategy Pattern in Python differently than example in Wikipedia?

In the 2009 Wikipedia entry for the Strategy Pattern, there's a example written in PHP.

Most other code samples do something like:

a = Context.new(StrategyA.new)
a.execute #=> Doing the task the normal way

b = Context.new(StrategyB.new)
b.execute #=> Doing the task alternatively

c = Context.new(StrategyC.new)
c.execute #=> Doing the task even more alternative

In the Python code a different technique is used with a Submit button. I wonder what the Python code will look like if it also did it the way the other code samples do.

Update: Can it be shorter using first-class functions in Python?