Advanced Python Objects Test¶

Advanced Numbers¶

Problem 1: Convert 1024 to binary and hexadecimal representation

In [1]:

bin(1024)

Out[1]:

'0b10000000000'

In [2]:

hex(1024)

Out[2]:

'0x400'

Problem 2: Round 5.23222 to two decimal places

In [3]:

round(5.23222, 2)

Out[3]:

5.23

Problem 3: Check if every letter in the string s is lower case

In [4]:

s = 'hello how are you Mary, are you feeling okay?'

s.islower()

Out[4]:

False

Problem 4: How many times does the letter 'w' show up in the string below?

In [5]:

s = 'twywywtwywbwhsjhwuwshshwuwwwjdjdid'

s.count('w')

Out[5]:

Problem 5: Find the elements in set1 that are not in set2:

In [8]:

set1 = {2,3,1,5,6,8}
set2 = {3,1,7,5,6,8}

set1.difference(set2)

Out[8]:

{2}

Problem 6: Find all elements that are in either set:

In [9]:

set1.union(set2)

Out[9]:

{1, 2, 3, 5, 6, 7, 8}

Problem 7: Create this dictionary: {0: 0, 1: 1, 2: 8, 3: 27, 4: 64} using a dictionary comprehension.

In [12]:

{k: k**3 for k in range(5)}

Out[12]:

{0: 0, 1: 1, 2: 8, 3: 27, 4: 64}

Problem 8: Reverse the list below:

In [14]:

list1 = [1,2,3,4]
list1.reverse()
list1

Out[14]:

[4, 3, 2, 1]

Problem 9: Sort the list below:

In [15]:

list2 = [3,4,2,5,1]
list2.sort()
list2

Out[15]:

[1, 2, 3, 4, 5]