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Conditional structures: Difference between revisions
→Function dispatch dictionary
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Line 3,016:
dispatcher[1]=bar
dispatcher[2]=baz # foo,bar, baz, and boz are defined functions.
# Then later
results = dispatcher.get(x, boz)() # binding results to a name is optional
Line 3,021 ⟶ 3,022:
if x in dispatcher:
results=dispatcher[x]()</lang>
<lang python># The above, but with a dict literal
dispatcher = {
0: foo,
1: bar,
2: baz,
}
# ...
dispatcher.get(x, boz)()</lang>
<lang python># Or without the temp variable
# (it's up to the reader to decide how "pythonic" this is or isn't)
{
0: foo,
1: bar,
2: baz,
}.get(x, boz)()</lang>
This can be particularly handy when using [[wp:Currying|currying]] techniques, or when lambda expressions or meta-function generators (factories) can be used in place of normal named functions.
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