Looping through a list of tuples

looping_tuples_finding_length.py

import sqlite3
db = sqlite3.connect('bookshop.db')
result = db.cursor().execute("SELECT * FROM books").fetchall()
db.close()

n = len(result)

print(n) #total number of tuples

looping_tuples_show_all.py

import sqlite3
db = sqlite3.connect('bookshop.db')
result = db.cursor().execute("SELECT * FROM books").fetchall()
db.close()

n = len(result) #total number of tuples

i = 0 #we will use i as an 'iterator' variable

while i < n: #while there are tuples to iterate..
    print(result[i]) #.. print the tuple, then
    i = i + 1 #.. move onto the next

looping_tuples_show_titles.py

import sqlite3
db = sqlite3.connect('bookshop.db')
result = db.cursor().execute("SELECT * FROM books").fetchall()
db.close()

n = len(result)

i = 0

while i < n:
    print(result[i][1]) #book title
    i = i + 1

Core Activities:

1. Run the above code files
2. Change the looping_tuples_show_titles.py code (above) to show all of the book authors (instead of the titles)
3. Change the same code so that the title field as well as the authors field appears for each book in the output, for example:

   Harry Potter and the Chamber of Secrets
   Rowling, J.K.
   Harry Potter and the Philosopher's Stone
   Rowling, J.K.
   
   etc...

Extension Activities:

4. For your previous question, try and show all the titles of the books and their prices beside them in the output window, for example:

   Harry Potter and the Chamber of Secrets $13.95
   Harry Potter and the Philosopher's Stone $12.95
   
   etc...

5. Try and add some column headings to your data by attempting to recreate the following layout:

   title                                    | price
   -------------------------------------------------
   Harry Potter and the Chamber of Secrets  | $13.95
   Harry Potter and the Philosopher's Stone | $12.95
   
   etc...