14: Reading data from a file in python

Try it:

Below you’ll see some example python code writes to a file called instructions.txt

Press Ctrl + Enter  to run the code.

This code will read a list of jobs from the file todo.csv and then display which jobs are marked as being done and which ones are marked as being not completed yet:

Challenges:

Start by running the code.

1. Add another job to todo.csv
   

   The format for the CSV file is number, task, done (y/n) – add a new line to the file todo.csv describing a task (e.g. brush your teeth)

2. Make a variable called remaining_jobs which stores the number of jobs which haven’t been done yet
   

   There are two main ways you can do this. You could set remaining_jobs to zero at the start of the program and increase it by one every time you add a task to the list jobs_to_do or you could use the len() function to count how many items are in the jobs_to_do list

3. Make a variable called total_jobs which stores the total number of jobs (done or not done yet)
   

   You could count how many lines are in the CSV file or you could add up the number of items in both jobs_to_do and jobs_done

On the next page you’ll get some code with both syntax and logic errors

KPRIDE

KPRIDE stands for Keywords, Predict, Run, Investigate, Debug and Extend and it’s a way of helping you explore and understand python code. Click on the image below for a set of KPRIDE activities for this python skill.

Page 1: Intro

Page 2: The theory: learn what you need to know as fast as possible.

Page 3: Try it: try out and adapt some working python code snippets.

Page 4: Debug it: Learn how to find and fix common mistakes.

Page 5: Extend it: Choose a project idea to use your newfound python skills.