Python videos | Python Part 9 - Files and Folders

Posted by Andy Brown on 16 October 2021


Python makes reading and writing files and looping over files and folders a joys, as this tutorial (which includes a long worked example towards the end) hopefully will demonstrate!

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
Useful links.txt Text file Useful web links referenced
Best films ever.txt Text file List of best films to read in
Read in films.py Python code Program to read in list of films
Write out films.py Python code Program to write out worst films
Looping over files.py Python code Program to loop over files and folders
Listing contents of 3 files.py Python code Program to loop over and read in 3 files
1 - countries 1-10.csv CSV file CSV files containing countries - part 1
2 - countries 11-20.csv CSV file CSV files containing countries - part 2
3 - Countries 21-30.csv CSV file CSV files containing countries - part 3

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.

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