Importing specific items in Python - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of importing specific functions

What is the output of this Python code when importing specific functions from a module?

Python

from math import sqrt, ceil

print(sqrt(16))
print(ceil(4.2))

A 16\n4

B 4.0\n5

C sqrt\nceil

D Error: ImportError

💡 Hint

Remember that sqrt(16) returns the square root of 16, and ceil(4.2) rounds 4.2 up to the nearest integer.

The code imports sqrt and ceil from the math module. sqrt(16) returns 4.0, and ceil(4.2) returns 5. So the output is two lines: 4.0 and 5.

❓ Predict Output

intermediate

Output when importing a variable and a function

What will be printed by this code snippet?

Python

from random import randint, seed

seed(1)
print(randint(1, 10))

A 1

B Error: NameError

C 3

D 2

💡 Hint

The seed function sets the random number generator state. With seed(1), randint(1,10) returns a fixed number.

Using seed(1) fixes the random sequence. The first randint(1,10) call after seed(1) returns 2.

🔧 Debug

advanced

Identify the error in importing specific items

What error will this code raise and why?

Python

from math import squareroot

print(squareroot(9))

A ImportError: cannot import name 'squareroot' from 'math'

B NameError: name 'squareroot' is not defined

C SyntaxError: invalid syntax

D AttributeError: module 'math' has no attribute 'squareroot'

💡 Hint

Check the spelling of the function you are importing from math.

The math module does not have a function named 'squareroot'. The import statement fails with ImportError.

🧠 Conceptual

advanced

Effect of importing specific items on namespace

After running this code, which names are available in the current namespace?

Python

from collections import deque, Counter

x = deque()
y = Counter()

A Only 'collections' is available as a module

B All names from collections module are available

C Only 'deque' and 'Counter' are available

D No names are available

💡 Hint

Importing specific items brings only those names into the current namespace.

Using 'from collections import deque, Counter' imports only these two names. The collections module itself is not imported as a whole.

📝 Syntax

expert

Correct syntax for importing multiple specific items

Which option shows the correct syntax to import 'path' and 'mkdir' from the 'os' module?

A from os import path, mkdir

B import os.path, os.mkdir

C import os(path, mkdir)

D from os import (path mkdir)

💡 Hint

Use 'from module import name1, name2' syntax to import multiple specific items.

Option A correctly uses 'from os import path, mkdir'. Option A tries to import attributes directly which is invalid syntax. Option A and D have syntax errors.