Part 8

Accompanying resources

• Slide deck: https://zipcoder.github.io/reveal-slides.data-engineering/zcw_content/python/fundamentals-part8.html

Exercise 1

Prep work

Create a file in the same directory as this file. Change permissions so that the file is not accessible.

touch locked_out_file.txt
chmod 000 locked_out_file.txt

Part A

• Open the program file_reader.py.
• Carefully read through the comments and the code.

Part B

• Open the test class test_file_reader.py.
• Execute each test in debug mode to reinforce the flow of each scenario.

Exercise 2

Create a program called tree.py

Given a file path (absolute or relative), the program should write to a file all of the contents of the directory and the child directories bellow it. The output file should look something like this:

./file1.py
./file2.py
./dir1/file1_in_dir1.txt
./dir1/file2_in_dir1.txt
./dir3/file1_in_dir3.txt