Question

Python 3, nbgrader, pandas 0.23.4

Q2 Default Value Functions (1 point) a) Sort Keys Write a function called sort_keys, which will return a sorted version of the keys from an input dictionary Input(s): dictionary :dictionary reverse boolean, default: False Output(s): .sorted_keys: list Procedure(s) Get the keys from the input dictionary using the keys()method (this will return a list of keys) Use the sorted function to sort the list of keys. Pass in reverse to sorted to set whether to reverse the sort order Return the sorted list of dictionary keys In [ ]: # rouR CODE HERE raise NotImplementedError) In assert callable (sort_keys) assert isinstance(sort keys('B':2, 'A': 1>),list) assert sort_keys(('B':2, A: 1)'A, B' assert sort_keys((2: B'. 1: A'>, reverse True) [2, 1 In assert callable(sort_keys) b) List Powers Write a function called list_powers This function will take a list, and return a new list where each element is exponentiated to a specified power. Input(s): collection collection of numbers power-int, default value: 2 Output(s): power_list- list of numbers Procedure(s: . Initialize an empty list to be filled and returned Loop through each element in the input collection Take the value to the power specified in power Append the result to the output list Return the list of powers In [ ]: # YOUR CODE HERE raise NotImplementedError) In assert callable(1ist_powers) assert isinstance(list_powers([1, 2]), list) assert list_powers ( (2, 4))4, 16 assert list powers(12, 4]. 3)8, 64 In :assert callable(list_powers)

Answer 1

Answer to a)

def sort_keys(dictionary, reverse=False):
    key_list = dictionary.keys()
    sorted(key_list, reverse=reverse)
    return key_list

raise NotImplementedError()
assert callable(sort_keys)
assert isinstance(sort_keys({'B': 2, 'A': 1}), list)
assert sort_keys({'B': 2, 'A': 1}) == ['A', 'B']
assert sort_keys({2: 'B', 1: 'A'}, reverse=True) == [2, 1]

assert callable(sort_keys)

Answer to b)

def list_powers(collection, power=2):
    power_list = []

    for i in collection:
        power_list.append(i ** power)

    return power_list
    

raise NotImplementedError()
assert callable(list_powers)
assert isinstance(list_powers([1, 2]), list)
assert list_powers([2, 4]) == [4, 16]
assert list_powers([2, 4], 3) == [8, 64]

assert callable(list_powers)