Tuples

Question 1

What is a Tuple?

Answer 1

• A tuple looks just like a list
• Tuples are immutable
• Use parentheses instead of square brackets dimensions = (200, 50) .
• Once you define a tuple, you can access individual elements by using each item’s index, just as you would for a list.
  ~~~
  dimensions = (200, 50)
  print(dimensions[0])
  print(dimensions[1])
  ~~~

Question 2

Looping Through All Values in a Tuple

Answer 2

dimensions = (200, 50)
for dimension in dimensions:
    print(dimension)
		
200
50

Question 4

Writing Over a Tuple

Answer 4

• Although you can’t modify a tuple, you can assign a new value to a variable that represents a tuple.
• The first four lines define the original tuple and print the initial dimensions. We then associate a new tuple with the variable dimensions, and print the new values. Python doesn’t raise any errors this time, because reassigning a variable is valid:

dimensions = (200, 50)
print("Original dimensions:")
for dimension in dimensions:
    print(dimension)

Original dimensions:
200
50

dimensions = (400, 100)
print("\nModified dimensions:")
for dimension in dimensions:
    print(dimension)

Modified dimensions:
400
100

Question 5

When to use Tuples?

Answer 5

• When compared with lists, tuples are simple data structures.
  * Use them when you want to store a set of values that should not be changed throughout the life of a program.