Table of contents
Data Types
Data types are the classification or categorization of data items. It represents the kind of value that tells what operations can be performed on a particular data.
Since everything is an object in Python programming, data types are classes and variables are instances (objects) of these classes.
Python has the following data types built-in by default: Numeric(Integer, complex, float), Sequential(string,lists, tuples), Boolean, Set, Dictionaries, etc
To check what is the data type of the variable used, we can simply write:
variable=100; type(variable)
Data Structures
Data Structures are a way of organizing data so that it can be accessed more efficiently depending on the situation. Data Structures are fundamentals of any programming language around which a program is built. Python helps to learn the fundamentals of these data structures in a simpler way as compared to other programming languages.
Lists: Lists are just like arrays, declared in other languages which is an ordered collection of data. It is very flexible as the items in a list do not need to be of the same type.
Tuple: Tuple is a collection of Python objects much like a list but Tuples are immutable i.e. the elements in the tuple cannot be added or removed once created. Just like a List, a Tuple can also contain elements of various types.
Dictionary: Dictionary is like hash tables in any other language with the time complexity of O(1). It is an unordered collection of data values, used to store data values like a map, which, unlike other Data Types that hold only a single value as an element, a Dictionary holds the key: value pair. Key-value is provided in the dictionary to make it more optimized
Tasks
1.Give the Difference between List, Tuple, Set and Dictionary. Do Handson and put screenshots as per your understanding.
| List | Tuple | Set | Dictionary |
| A list is a non-homogeneous data structure that stores the elements in columns of a single row or multiple rows. | A Tuple is also a non-homogeneous data structure that stores elements in columns of a single row or multiple rows. | The set data structure is also non-homogeneous but stores the elements in a single row. | A dictionary is also a non-homogeneous data structure that stores key-value pairs. |
| The list can be represented by [ ] | A tuple can be represented by ( ) | The set can be represented by { } | The dictionary can be represented by { } |
| The list allows duplicate elements | Tuple allows duplicate elements | The Set will not allow duplicate elements | The dictionary doesn’t allow duplicate keys. |
| The list can be nested among all | A tuple can be nested among all | The set can be nested among all | The dictionary can be nested among all |
| Example: [1, 2, 3, 4, 5] | Example: (1, 2, 3, 4, 5) | Example: {1, 2, 3, 4, 5} | Example: {1: “a”, 2: “b”, 3: “c”, 4: “d”, 5: “e”} |
| A list can be created using the list() function | A tuple can be created using the tuple() function. | A set can be created using the set() function | A dictionary can be created using the dict() function. |
| A list is mutable i.e. we can make any changes in the list. | A tuple is immutable i.e. we can not make any changes in the tuple. | A set is mutable i.e. we can make any changes in the set, but elements are not duplicated. | A dictionary is mutable, but Keys are not duplicated. |
| List is ordered | Tuple is ordered | Set is unordered | The dictionary is ordered |
| Creating an empty list l = [] | Creating an empty Tuple t = () | Creating a set a = set() | Creating an empty dictionary d = { } |
List: List is a datatype in Python, that we can write as a list of comma-separated values, in square brackets. The list is mutable. This can store any type of element.
Tuple: Python Tuple is a collection of objects separated by commas. In some ways, a tuple is similar to a Python list in terms of indexing, nested objects, and repetition but the main difference between both is Python tuple is immutable, unlike the Python list which is mutable.
Set: A Set in Python programming is an unordered collection data type that is iterable, mutable and has no duplicate elements.
Dictionary: A Dictionary in Python is a collection of key values, used to store data values like a map, which, unlike other data types holds only a single value as an element.
2.Create the below Dictionary and use Dictionary methods to print your favorite tool just by using the keys of the Dictionary.
fav_tools = { 1:"Linux", 2:"Git", 3:"Docker", 4:"Kubernetes", 5:"Terraform", 6:"Ansible", 7:"Chef" }
3.Create a List of cloud service providers eg. cloud_providers = ["AWS", "GCP", "Azure"]. Write a program to add Digital Ocean to the list of cloud_providers and sort the list in alphabetical order.
2.Create below Dictionary and use Dictionary methods to print your favourite tool just by using the keys of the Dictionary.