Import aliasing in Python - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is import aliasing in Python?

Import aliasing is when you give a different name to a module or function when you import it. This helps to use shorter or clearer names in your code.

beginner

How do you alias a module named math as m?

You write <code>import math as m</code>. Now you can use <code>m.sqrt()</code> instead of <code>math.sqrt()</code>.

beginner

Why use import aliasing?

It makes code shorter and easier to read. It also helps avoid name conflicts if two modules have the same function names.

intermediate

Show how to alias a function datetime.datetime as dt.

You can write <code>from datetime import datetime as dt</code>. Then use <code>dt.now()</code> to get the current date and time.

intermediate

Can you alias multiple imports in one line? Give an example.

Yes. For example: <code>from math import sqrt as sq, factorial as fact</code>. Now use <code>sq(9)</code> and <code>fact(5)</code>.

What does this code do? <br>import numpy as np

A Imports np module

B Imports numpy and calls it np in the code

C Creates a new module named np

D Renames numpy to numpy

The code imports the numpy module but allows you to use the short name np instead of numpy.

How do you alias a function random.randint as rand?

A from random import randint as rand

B from random import randint

C from random import randint as randint

D import random as randint

You use from random import randint as rand to alias the function to a new name.

Why might you want to alias imports?

A To make code longer

B To delete the original module

C To avoid name conflicts and shorten code

D To change module functionality

Aliasing helps avoid name conflicts and makes code easier to write and read.

Which is the correct syntax to alias the module pandas as pd?

A import pandas as pd

B from pandas import pd

C import pd as pandas

D alias pandas as pd

The correct syntax is import pandas as pd.

What happens if you don't alias a long module name?

A Code will not run

B The module will be renamed

C Python will alias it automatically

D You must type the full module name every time

Without aliasing, you need to type the full module name each time you use it.

Explain what import aliasing is and why it is useful.

Think about how you might give a nickname to a long name to make it easier to use.

Write an example of aliasing a module and a function in Python.

Use 'import math as m' and 'from datetime import datetime as dt' as examples.