Tuples and Lists

• We have understood some of the python’s basic data types
  • Boolean’s
  • integer’s
  • Float’s
  • String’s
• I want to store
  • my favourite holiday spot’s
  • courses which I enrolled
• Python has two sequence structures
  • Tuple
  • lists
• These contain zero or more elements, unlike string the elements can be of different types.
• Why does python contain both lists and tuples?
  • Tuples are immutable
  • Lists are mutable

Tuples

• Create with Commas and ()
• Tuple unpacking:

combo_meal = ('biryani', 'coke')
main_course, desert = combo_meal

• Combining tuples using + :

• Duplicate items with * :

• Iterating over tuples: Refer Here for the example with while and for based iteration

Lists

• Lists are good at keeping track of things/elements by their order, especially when the order and contents might change.

• Unlike, strings or tuples lists are mutable.

• Create with []

  • Convert to list

• Converting list to tuple

• Getting an Item by [ offset ]

• Get Items with a Slice

• Adding an item to the list with append()

• Adding an Item by offset using insert()

• Duplicate All items with *

• Combine lists using extend() or +

• Delete an item by offset with del

• Delete an Item by Value with remove

• Get and Item by Offset and Delete it with pop()

• Delete all the items with clear

Lets write a Python Program to Store

• How do you represent the following data in python (covered so far)

[
    ['ram', 99999999, 'BTech'],
    ['shyam',8888888,'Mtech' ],
    ['sita', 77777777, 'MCA'],
    ['geeta', 6666666, 'BSc'],    
]

• Refer Here for the code created in the class