# Functions are first-class citizens in Python:
# They can be passed as arguments to other functions,
# returned as values from other functions, and
# assigned to variables and stored in data structures.
>>> def myfunc(a, b):
... return a + b
...
>>> funcs = [myfunc]
>>> funcs[0]
<function myfunc at 0x107012230>
>>> funcs[0](2, 3)
5
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