Python List Methods

Question	Click to View Answer
What does the following code print to the console. nums = [1, 2, 3, 4, 1, 4, 1] print(nums.count(1))	`3` is printed. The `count` method returns the number of times an element is in a list.
What does the following code print to the console. cities = ["boston", "philly", "LA"] print(len(cities))	`3` is printed. The Python `len` function returns the number of items in a list.
What does the following code print to the console. doubles = [22, 11, 66] doubles.sort() print(doubles)	`[11, 22, 66]` is printed. The `sort()` method rearranges the numbers in a list in ascending order.
What does the following code print to the console. foods = ["pizza", "pie", "ham"] foods.reverse() print(foods)	`['ham', 'pie', 'pizza']` is printed. The `reverse()` method reverses the items in a list.
What does the following code print to the console. stuff = ["a", "b", "c"] stuff.insert(1, "water") print(stuff)	`['a', 'water', 'b', 'c']` is printed. The `insert()` method is used to add the `"water"` string in position 1 of the `stuff` list.
What does the following code print to the console. bases = ["first", "second", "third", "fourth"] bases.remove("fourth") print(bases)	`['first', 'second', 'third']` is printed. The `remove()` method deletes an item from a list.
What does the following code print to the console. digits = [1, 4, 2, 8, 1] digits.remove(1) print(digits)	`[4, 2, 8, 1]` is printed. The `remove()` method only delete the first matching item in a list. It does not delete all of the matching items.
What does the following code print to the console. flowers = ["rose", "tulip"] flowers.clear() print(flowers)	`[]` is printed. The `clear()` method deletes all items in a list.
What does the following code print to the console. letters = ["b", "a", "y", "a"] index = letters.index("a") print(index)	`1` is printed. The `index()` method prints the index of the first occurrence of an item in a list. The string "a" is in positions 1 and 3. The `index()` method returns 1 in this example because that's the index of the first "a" in the list.
What does the following code print to the console. numbers = [1, 2, 3] pos = numbers.index(44) print(pos)	This code raises a `ValueError: 44 is not in list` error. When the `index()` method cannot find an item in a list, it raises an error.
What does the following code print to the console. odds = [1, 3, 5, 7] odds.pop() print(odds)	`[1, 3, 5]` is printed. The `pop()` method removes the last element from a list.
What does the following code print to the console. evens = [2, 4, 6] last_num = evens.pop() print(last_num)	`6` is printed. The `pop()` method returns the last element in a list and removes the last element from a list.