Python videos | Python Part 7a - Sequences: iterating using for loops

Posted by Andy Brown on 13 October 2021

Iterating sequences has a good claim to be the most important topic in Python. This tutorial shows the four types of sequences (tuples, lists, ranges and strings), explains how to loop over them and gives 4 practical examples of their use.

See our full range of Python training resources, or test your knowledge of Python with one of our Python skills assessment tests.

This video has the following accompanying files:

File name Type Description
Lists and Python code Creating lists and tuples
Ranges and Python code Ranges and strings as sequences
Looping over Python code Looping over different types of sequence
Example 1 - listing Python code Case study 1 - listing files in folder
Example 2 - listing Python code Case study 2 - listing words in quotation
Example 3 - listing module Python code Case study 3 - listing built-in module names
Example 4 - listing Python code Case study 4 - listing web page hyperlinks

Click to download a zipped copy of the above files.

After watching this video, you may like to test your understanding by doing one or more of the following exercises:

You can also download the answers to each exercise from the links above.

Making a  video bigger

You can increase the size of your video to make it fill the screen like this:

View full screen

Play your video (the icons shown won't appear until you do), then click on the full screen icon which appears as shown at its bottom right-hand corner.


When you've finished viewing a video in full screen mode, just press the Esc key to return to normal view.

Improving the quality of a video

To improve the quality of a video, first click on the Settings icon:

Settings icon

Make sure you're playing your video so that the icons shown appear, then click on this gear icon at the bottom right-hand corner.


Choose to change the video quality:

Video quality

Click on Quality as shown to bring up the submenu.


The higher the number you choose, the better will be your video quality (but the slower the connection speed):

Connection speed

Don't choose the HD option unless you have a fast enough connection speed to support it!


Is your Wise Owl speaking too slowly (or too quickly)?  You can also use the Settings menu above to change your playback speed.

This page has 0 threads Add post