Write code to assign to the variable map_testing all the elements
in lst_check while adding the string “Fruit: ” to the beginning of
each element using mapping.
lst_check = ['plums', 'watermelon', 'kiwi', 'strawberries', 'blueberries', 'peaches', 'apples', 'mangos', 'papaya']
map_testing = list(map(lambda x: f"Fruit: {x}", lst_check))Below, we have provided a list of strings called countries. Use filter
to produce a list called b_countries that only contains the strings
from countries that begin with B.
countries = ['Canada', 'Mexico', 'Brazil', 'Chile', 'Denmark', 'Botswana', 'Spain', 'Britain', 'Portugal', 'Russia', 'Thailand', 'Bangladesh', 'Nigeria', 'Argentina', 'Belarus', 'Laos', 'Australia', 'Panama', 'Egypt', 'Morocco', 'Switzerland', 'Belgium']
b_countries = list(filter(lambda x: x.startswith("B"), countries)) Below, we have provided a list of tuples that contain the names of Game
of Thrones characters. Using list comprehension, create a list of strings
called first_names that contains only the first names of everyone in
the original list.
people = [('Snow', 'Jon'), ('Lannister', 'Cersei'), ('Stark', 'Arya'), ('Stark', 'Robb'), ('Lannister', 'Jamie'), ('Targaryen', 'Daenerys'), ('Stark', 'Sansa'), ('Tyrell', 'Margaery'), ('Stark', 'Eddard'), ('Lannister', 'Tyrion'), ('Baratheon', 'Joffrey'), ('Bolton', 'Ramsey'), ('Baelish', 'Peter')]
first_names = [firstname for lastname, firstname in people]Use list comprehension to create a list called lst2 that doubles each
element in the list, lst.
lst = [["hi", "bye"], "hello", "goodbye", [9, 2], 4]
lst2 = [x*2 for x in lst]Below, we have provided a list of tuples that contain students’ names and
their final grades in PYTHON 101. Using list comprehension, create a new
list passed that contains the names of students who passed the class
(had a final grade of 70 or greater).
students = [('Tommy', 95), ('Linda', 63), ('Carl', 70), ('Bob', 100), ('Raymond', 50), ('Sue', 75)]
passed = [name for name, grade in students if grade >= 70]Write code using zip and filter so that these lists (l1 and l2) are combined
into one big list and assigned to the variable opposites if they are both
longer than 3 characters each.
l1 = ['left', 'up', 'front']
l2 = ['right', 'down', 'back']
opposites = list(filter(lambda x: len(x[0])>3 and len(x[1])>3, zip(l1, l2)))Below, we have provided a species list and a population list. Use zip to
combine these lists into one list of tuples called pop_info. From this list,
create a new list called endangered that contains the names of species whose
populations are below 2500.
species = ['golden retriever', 'white tailed deer', 'black rhino', 'brown squirrel', 'field mouse', 'orangutan', 'sumatran elephant', 'rainbow trout', 'black bear', 'blue whale', 'water moccasin', 'giant panda', 'green turtle', 'blue jay', 'japanese beetle']
population = [10000, 90000, 1000, 2000000, 500000, 500, 1200, 8000, 12000, 2300, 7500, 100, 1800, 9500, 125000]
pop_info = list(zip(species, population))
endangered = [name for name, population in pop_info if population < 2500]
print(endangered)