YouTube Link: https://youtu.be/QswQA1lRIQY ** Python Certification Training: https://www.edureka.co/python ** This Edureka PPT on 'Collections In Python' will cover the concepts of Collection data type in python along with the collections module and specialized collection data structures like counter, chainmap, deque etc. Following are the topics discussed: What Are Collections In Python? What Is A Collection Module In Python? Specialized Collection Data Structures Follow us to never miss an update in the future. YouTube: https://www.youtube.com/user/edurekaIN Instagram: https://www.instagram.com/edureka_learning/ Facebook: https://www.facebook.com/edurekaIN/ Twitter: https://twitter.com/edurekain LinkedIn: https://www.linkedin.com/company/edureka Castbox: https://castbox.fm/networks/505?country=in

1. Copyright © 2017, edureka and/or its affiliates. All rights reserved.

2. What Are Collections In Python?
What Is A Collections Module In Python?
www.edureka.co/python
Specialised Collections Data Types

3. www.edureka.co/python

4. www.edureka.co/python
There are four collection
data types in python
which are used to store
collections of data.
LISTS
TUPLES
SETS
DICTIONARY

5. What Is A Collections Module In Python?
www.edureka.co/python

6. What Is A
Collection
Module In
Python?
www.edureka.co/python
COLLECTIONS
Specialised Collection
data structures

7. www.edureka.co/python

8. Specialised
Collections
Data Types
www.edureka.co/python
defaultdict
namedtuple()
UserString
UserDict
Chainmap
UserList
OrderedDict
Counter
deque

9. namedtuple()
www.edureka.co/python
namedtuple() returns a tuple with a named value for each element in
the tuple.
Details = (name= ‘edureka’ , course=‘python’ , course2= ‘data science’)

10. deque
www.edureka.co/python
deque pronounced as ‘deck’ is an optimised list to
perform insertion and deletion easily.
Deque( [ ‘e’ , ’d’ , ’u’ , ’r’ ,’e’ , ’k’ , ’a’ ] )

11. Chainmap
www.edureka.co/python
Chainmap is a dictionary like class for creating a single
view of multiple mappings.
A = { 1: ‘edureka’ , 2: ‘python’}
B = { 3: ‘data science’ , 4: ‘AI’}
[ {1: ‘edureka’ , 2: ‘python’} , {3: ‘data science’, 4: ‘AI’} ]

12. Counter
www.edureka.co/python
Counter is a dictionary subclass for counting hashable
objects..
A = [1,2,1,2,1,2,3,4,5,6,7,2,1,2]
Count = Counter(a)
Counter( {1:4 , 2:5 , 3:1 , 4:1 , 5:1 , 6:1, 7:1})

13. OrderedDict
www.edureka.co/python
OrderedDict is dictionary subclass which remembers the
order in which the entries were done.
od = collections.OrderedDict()
od[‘a’] = 2
od[’b’] = 1
od[‘c’] = 3
Print(od)
OrderedDIct( { [ (a ,2) , (b, 1 ), (c ,3 ) ] )

14. defaultdict
www.edureka.co/python
defaultdict is a dictionary subclass which calls a factory
function to supply missing values.
D = defaultdict(int)
D[‘edureka’] = 1
D[‘python’] = 2
Print(D[‘java’]
Output : 0

15. UserDict,
UserList,
UserString
www.edureka.co/python
UserDict is a wrapper around dictionary objects for
easier dictionary sub-classing.
UserList is a wrapper around list objects for easier List
sub-classing.
UserString is a wrapper around string objects for easier
string sub-classing.

16. Copyright © 2017, edureka and/or its affiliates. All rights reserved.
www.edureka.co

17. www.edureka.co/python