This document provides an overview of Python lists. It defines what a list is (an ordered sequence that can contain multiple values of any data type), and provides basic examples of list syntax and creation. It describes accessing list elements using indexes and slices, and built-in list methods like len(), sort(), and append. It also covers list operations like concatenation and replication. The document is intended as an introductory lecture on Python lists for a programming course.

1. BVRIT HYDERABAD College of Engineering for Women
Python Programming
By
M Dyva Sugnana Rao
Asst. Professor
Department of Computer Science and Engineering

2. BVRIT HYDERABAD College of Engineering for Women
Name of the Course Python Programming
Course Code CS601PC
Year & Semester B.Tech VI Year I Sem
Section CSE - A
Name of the Faculty M Dyva Sugnana Rao
Lecture Hour | Date 02 | 28 October 2020
Name of the Topic List’s
Course Outcome(s) Explore about List’s

3. The List Data Type
A list is a value that contains multiple values in an ordered sequence.
Square bracket, [].
Values inside the list are also called Items.
Ex:
List1 = [1 , 2 , 3 , 4]
Lst2 = [12.5 , 6.7 , 8.9]
Lst = [‘asd’ , ’fgh’ , ’ghkgjj’]
List = [12 , ‘cat’ , 12.5,7,89999,’fghh’]

4. List with Indexes
Ex: List = [‘cat’ , ‘rat’ , ‘bat’, ‘mat’]
List[0]
List[1]
List[3]
List[5]
IndexError: list index out of range
List[1.0]
TypeError: list indices must be integers, not float

5. Lists can also contain other list values.
List = [ ['cat', 'bat'], [10, 20, 30, 40, 50] ]
List[0]
List[1]
List[0][1]
List[1][2]

6. Negative Indexes
The integer value -1 refers to the last index in a list.
List = ['cat', 'bat', 'rat', 'elephant']
List[-1]
List[-2]

7. Getting Sublists with Slices
Index can get a single value from a list, a slice can get several values
• List[2] is a list with an index (one integer).
• List[1:4] is a list with a slice (two integers).

8. Getting a List’s Length with len()
List = ['cat', 'dog', 'moose']
Len(list)

9. Changing Values in a List with Indexes
List = ['cat', 'bat', 'rat', 'elephant']
List [1] = ‘dog’
List[2]= List[1]

10. List Concatenation and List Replication
Removing Values from Lists with del Statements
List = ['cat', 'bat', 'rat', 'elephant']
Del List[2]
Del List[2]

11. Using for Loops with Lists
for i in [0, 1, 2, 3]:
print(i)

12. sort() Method
List = [2, 5, 3.14, 1, -7]
List.sort()
List.sort(reverse.true)
Observations:
List= List.sort()
List= [1, 3, 2, 4, 'Alice', 'Bob']
List = ['Alice', 'ants', 'Bob', 'badgers', 'Carol', 'cats']

13. BVRIT HYDERABAD College of Engineering for Women
Thankyou