Lambda

Question 1

print((lambda a: a+10)(5))

Answer 1

15

Question 2

print((lambda a,b:a*b)(5,6))

Answer 2

30

Question 3

x = lambda a, b, c: a + b + c

print(x(5, 6, 2))

Answer 3

13

Question 4

print(list(map(lambda x: x.capitalize(), [‘cat’, ‘dog’, ‘cow’])))

Answer 4

[‘Cat’, ‘Dog’, ‘Cow’]

Question 5

print(list(map(lambda x: x[::-1], [‘cat’, ‘dog’, ‘cow’])))

Answer 5

[‘tac’, ‘god’, ‘woc’]

Question 6

print(list(map(lambda x: x.replace(‘o’,’a’), [‘cat’, ‘dog’, ‘cow’])))

Answer 6

[‘cat’, ‘dag’, ‘caw’]

Question 7

#There are spaces to the left and right of cat, dog, and cow
print(list(map(lambda x: x.strip(), [' cat ', ' dog  ', ' cow '])))

Answer 7

[‘cat’, ‘dog’, ‘cow’]

Question 8

print(list(map(lambda x: x.endswith(‘g’), [‘cat’, ‘dog’, ‘cow’])))

Answer 8

[False, True, False]

Question 9

print(list(map(lambda x: x.isalpha(), [‘cat’, ‘dog’, ‘cow’])))

Answer 9

[True, True, True]

Question 10

print(list(map(lambda x: x.count(‘o’), [‘cat’, ‘dog’, ‘cow’])))

Answer 10

[0, 1, 1]

Question 11

print(list(map(lambda x: len(x), (‘cat’, ‘banana’, ‘cherry’))))

Answer 11

[3, 6, 6]

Question 12

avar = lambda x: x != 2 and x != 4

print(list(filter(avar, range(6))))

Answer 12

[0, 1, 3, 5]

Question 13

avar = lambda x: x < 4 or x > 8

print(list(filter(avar, range(11))))

Answer 13

[0, 1, 2, 3, 9, 10]

Question 14

print(list(filter(lambda x: x%2 == 0, range(11))))

Answer 14

[0, 2, 4, 6, 8, 10]

Question 15

student_tuples = [(‘john’, ‘A’, 15),(‘jane’, ‘B’, 12),(‘dave’, ‘B’, 10),]
print(sorted(student_tuples, key=lambda student: student[2]))

Answer 15

#sorts 10, 12, then 15
[('dave', 'B', 10), ('jane', 'B', 12), ('john', 'A', 15)]

Question 16

student_tuples = [(‘john’, ‘A’, 15),(‘jane’, ‘B’, 12),(‘dave’, ‘B’, 10),]
print(sorted(student_tuples, key=lambda student: student[0]))

Answer 16

#sorts dave, jane, then john
[('dave', 'B', 10), ('jane', 'B', 12), ('john', 'A', 15)]

Question 17

lst = [(‘candy’,’30’,’100’), (‘apple’,’10’,’200’), (‘baby’,’20’,’300’)]
lst.sort(key=lambda x:x[1])
print(lst)

Answer 17

#sorts 10, 20, then 30
[('apple', '10', '200'), ('baby', '20', '300'), ('candy', '30', '100')]