Python : List and related functions

List is a datatype in python which can store a set of values.

Lets say we need to create a list as 'name'

Initialize a list

name = list()

Alternate way is

name = [] #This will make an empty list

name = ['apple','orange','mango'] #This will make a list with 3 elements

Various functions that can be performed on list

APPEND(element)

Adds an element to the list

>>> name = ['apple','orange','mango']

>>> name.append('banana')

>>>['apple','orange','mango','banana']

EXTEND(list)

This function can be used to merge two or more list into one.

lets says we have another list fruits = ['coconut','jackfruit']

>>> name = ['apple','orange','mango']

>>> name.extend(fruits)

>>>['apple','orange','mango','coconut','jackfruit']

INSERT(position,element)

To insert an element at specified location

>>> name = ['apple','orange','mango']

>>> name.insert(2,1)

>>>['apple','orange',2,'mango']

REMOVE(element)

Remove the first occurrence of the element specified from the list

>>> name = ['apple','orange','mango']

>>> name.remove('orange')

>>>['apple','mango']

POP()

This removes the last element from the list

>>> name = ['apple','orange','mango']

>>> name.pop()

>>>['apple','orange']

INDEX(element)

This returns the index of the element specified (first occurrence)

>>> name = ['apple','orange','mango']

>>> name('apple')

>>>0

COUNT(element)

This returns the count of occurrences of the element specified in the list

>>> name = ['apple','orange','mango']

>>> name.count('apple')

>>>1

SORT()

This function will sort the list

>>> name = ['apple','orange','mango']

>>> name.sort()

>>>['apple','mango','orange']

REVERSE()

This function will reverse the list

>>> name = ['apple','orange','mango']

>>> name.reverse()

>>>['mango','orange','apple']