How s python dispatcher works

python_dispatcher.py

def avocado(key):
    return key + ': Avocado'


def banana(key):
    return key + ': Banana'


def cherry(key):
    return key + ': Cherry'


def dispatcher(key):
    dispatch = {
        'a': avocado,
        'b': banana,
        'c': cherry
    }
    return dispatch[key](key)
    # I should only pass the parameter here
    # Otherwise all the funcions will be called on the dispatcher dict

print(dispatcher('a'))