DEV Community: Vishal J

July 10, 2024 Python | DataTypes, Variables, Constants

Vishal J — Mon, 26 Aug 2024 06:37:22 +0000

This is a series of Python learning blog from parottosalna community by kaniyam foundation

This blog is based on this video Python | DataTypes, Variables, Constants | ParottaSalna"

To watch the full series check this youtube playlist

Contents

Datatypes
Variables
Constants
General Notes

Datatypes:

3 Types of Datatypes
1. Numeric
  1. Integer
  2. Float / Decimal number
  3. Constants
2. Text
3. Boolean Types
  - True, False, None
  - Examples:
    - is_active = true
    - no_of_apples = none
Command to check the input type type(26) , Output will be int datatype
Everything in Python Language is "Object"
Command to see functionalities of a Object dir(26) , Output show the available functionalities as a list.
str is the short form of String.
Addition of Strings
- "Vishal" + "J" , The Output will be VishalJ

Variables:

Variable is a container to hold the values. And Variables will refer to Object / Value / Data.
There are some regulations in variable writing
1. No symbol in-between
2. Only start with Characters.
Command for Multiple assignment
- name, age = "Vishal", 20
  - Here is a example of tuple data type
Command to print the datatype in a program
- print(type(name))
Running inspect - terminal option in browser to use JavaScript program
Commenting is useful to denote what is going in a program
- To comment single line #
- To comment multiple lines """Hello world """

Constants:

Types of Constants styles
1. PascalCase
2. Camelcase
3. snake_case
Google Colab uses Jupiter notebook and into include automatic feature to print texts without print function
Book recommendation
- Byte of Python
Quiz's and Tasks for Practising
File handling commands
- Command to create a new file "file.txt" in F folder with program of print("Some content")
  - with open("file.txt", "w") as f: print("some content", file=f)
Concatenate make to add two strings as metioned in above before
- print("Hello" + " World" , the Output will be Hello World
- print("Hello" , "World") , The Output will be Hello World . Here the the , symbol will add some space between the words.

General Notes

By using Books you can use to self study and to advance
Note: We can paste images in Zoom chat option
To learn JavaScript one must have to know HTML
Forums to ask questions
1. Stack overflow
2. Chennai mailing list
3. Tamil Linux Community

July 9, 2024 Print() Python (Q/A) - Part 2

Vishal J — Sat, 17 Aug 2024 06:24:46 +0000

This is a series of Python learning blog from parottosalna community by kaniyam foundation

This blog is based on this video "Print() Python (Q/A) | ParottaSalna - Part 2](https://youtu.be/OWjW7GBMND4?list=PLiutOxBS1Mizte0ehfMrRKHSIQcCImwHL)"

To watch the full series check this youtube playlist

Contents:

Websites to learn programming for beginners
Python installation in windows

Websites to learn programming for beginners

https://code.org/
https://scratch.mit.edu/

To use python in windows

Install the python .exe file and select the option "Add python to environment variables"
Create python file in text editor and save it in a folder
Go to the file location in the windows explorer and in the location path enter cmd to open the file path in terminal
In terminal to execute the python program enter python <file name>
To check the available file in the folder enter dir

July 9, 2024 Print() - Part 1

Vishal J — Mon, 12 Aug 2024 10:42:47 +0000

Contents:

About print function and its arguments
- Sep argument
Different types of print formats
Using escape sequences with print function
Rasting - To insert file path
Typecasting - To change data format to another format
Learnt about how to print multi line string
Sting Multiplication
Different methods of print formats like F String
To see the different methods for a function by using dir command before a function
Usages of print function
`print("")
- This is call as print function
Different cases with print() function
- print("Hello", "World") \Seperator
  - Output: Hello World
    - There is a space between two words due to default sep argument
- print("Hello", "World", sep="-")
  - Output: Hello-World
- print("Hello", "World", sep="\n") \ Enter or new line
  - Output: Hello World
- print("Hello", "World", sep="\t") \Tab
  - Output: Hello World

Cancatinating string

In Python language, every thing is consider as objects, every object has special functionalities.
print("Hello" + " World" + "Welcome" + " To Python Class")
- Output: Hello WorldWelcome to Python Class
print("Hello", "World", end="?"
- Output: Hello World?

Ecape Sequence

For print pattern
- print("#\n##\n###\n#####")
- output: # ## ### ####
Some Escape sequences
- \n
- \t

Rasting

To inset print native file path
print(r"C:\users/syedajafer/document")
- Output: C:\users/syedajafer/document
Insert double quatation the value will be in string

Type casting

print("abc" + str(123))
- Output: abc123
To add Quatations in a string
- print(' "Hello world"')
  - Output: "Hello world"
- print(" 'Hello world' ")
  - Output: 'Hello world'

Multi line string

To print as paragraph print(""" My Name is Vishal. How are you? What is your name? """)
Output: My Name is Vishal. How are you? What is your name?

String Multiplication

print("Hello" * 3)
- Output: HelloHelloHello
print("Hello" * 3 *2)
- Output: HelloHelloHelloHelloHelloHello

Format

`
name = "abc"
age = 25
print("Name: {}, Age:{}".format(name, age))

Output:
Name: abc, Age: 25
`

print("Name: {name}, Age: {age}" .format(name="abc", age=25))

Output: Name: abc, Age: 25
`

` print("Name: {name}, Age: {age}" .format(name=["abc"], age=25))

Output: Name: ['abc'], Age: 25
Note: It will also print the strings in list data Structure
`

F string ` name = "Syed" age = 26 print(f"Name: {name}, Age: {age}")

Output: Name: Syed, Age: 26
`

"Hello World" * 2
- Output: Hello WorldHello World
- Use can use printfunction without print function syntax
To see available methods for a function use dir

Usages of print() function

software development while debugging by checking what is the result at each stages
While going to production, they remove print function and insert log key
Desktop application to print the status

How to write a blog in dev.to and wordpress ?

Vishal J — Thu, 08 Aug 2024 10:02:32 +0000

Blog post through dev.to
1. Create account and start blogging
Blog post through wordpress
1. Create account
2. Choose wordpress package with free version to create blog and start blogging

July 8, 2024 Python Meet & Greet - Part 2

Vishal J — Thu, 08 Aug 2024 09:57:39 +0000

This is a series of Python learning blog from parottosalna community by kaniyam foundation

This blog is based on this video "Python Meet & Greet - Part 2 | Parotta Salna" - Day 1 of Python learning Introduction class

To watch the full series check this youtube playlist

Objectives

Introduction to Python Program
About Linux user groups and their activites in Tamilnadu
Contact numbers and links
Forum questions asking methods
Today Tasks

Linux groups and meetups in tamilnadu
- Kanchi linux user group
  - https://kanchilug.wordpress.com/
  - Every week online meeting and discuss about tech and linux updates
- FSHM - Pondicheery
  - https://www.fshm.org/
- Chennaipy - Chennai
  - Monthly meetup
  - having Mailing list
To get updates for the linux meetups you can check the kaniyam.com website calender
The know for meetups check for meetup.com
These groups are volunteer group for knowledge sharing
GNU Linux
Windows or Mac are properaty software
Linux is made by the people for the people
GNU image for alternative photoshop
The only thing is after modify the software, it should be reelase it with original license
muthuramalingam tamil python - Youtube channel
To eliminate Thayakkam
- This is what i know, and I am sharing it with you
By asking questions in forums you are creating a knowledge database
Ask questions in mailing list in chennaipy.org
By using tanglish you are not strong in either english or in tamil.
Things to remember when asking question
- Don't ask your questions in one line
- If possible add error code
- If you have any question, always ask in public
Programming is like cooking
UI/UX - Javascript or HTML or CSS
Srinivasan is using Ubuntu KDE distribution of Linux
Srinivasan's Phone number: 9841795468
Dhanasekaran and Srinivasan is organising the class
Every week saturday teaching reactJS
Today Exercise
- Install Python
- Login in colab
Freetamilebook.com
python books
- Bytes of python
Telegram link: https://t.me/+2Q_uTW7j9xtkMmVl

July 8, 2024 Python - Meet & Greet - Part 1

Vishal J — Thu, 08 Aug 2024 09:47:43 +0000

This is a series of Python learning blog from parottosalna community by kaniyam foundation

This blog is based on this video "Python - Meet & Greet - Part 1 | ParottaSalna" - Day 1 of Python learning Introduction class

To watch the full series check this youtube playlist

Objectives:

Why Python ?
Course Syllabus
Python Installation - Windows, Linux
Collab Notebook
Where to see updates & recordings.
Where to ask questions ?
Our Expectations
Basic Print Command
About FOSS, FOSS Communities.

Applications of Python language
- https://www.python.org/about/apps/
Syllabus
- https://parottasalna.com/python-development/
- Each concepts includes - Basic, Intermediate and Advanced
Resources provided the team
1. Blog
2. Infographic PDF with important concepts
3. Quiz
4. Task like exercises
Learn -> Write blog -> Teach someone
python is open source
Python Colab in google for temperavery
- Each program set is called cell
To ask questions
- Ask in Tamil linux forum
- Direct question in whatsup after class upto 2 hours
- Few minutes before the class
To check updates for class
- Check in Kaniyam website
- Check in python syllabus session
- Youtube channel live notification
- Direct message to mentors
To find answer for my question
1. First check in google search
2. Then ask question
Expectations
- To write blog notes after each classes
Programming
- Print command
  - print("") this the format of the print command
  - To run the code python print or python print.py
Python is ready install in linux, if not install it with brew command
Mentor will use VScode and colob for teaching
Telegram link: https://t.me/+2Q_uTW7j9xtkMmVl

15-07-2024 Day 4 Python learning

Vishal J — Tue, 16 Jul 2024 05:40:21 +0000

This is a series of Python learning blog from parottosalna community by kaniyam foundation

This blog is based on this video Operators, Conditionals, Input | Python | ParottaSalna"

To watch the full series check this youtube playlist

Colab Notebook link
Creating a calculator
single division gives result in flat value
calculator include arithmetic operations like Addition, subtraction, division,
modules - to find the remainder; modules have the symbol of percentage %
num1 = int(input("Enter Number 1"))
mum2 = int(input("Enter Number 2"))
result = num1+num2
print("result is", result)