Concepts Introduction

Reading from a File

Writing to a File

Adding More Content to The File

File Handling with the help of Context Managers

with open('example.txt', 'r') as file:
    content = file.read()
    print(content)

File Read related Errors

try:
    with open('example.txt', 'r') as file:
        content = file.read()
        print(content)
except FileNotFoundError:
    print("The file does not exist.")

Conclusion

What Are Collections in Python?

Lists: A Collection That Is Dynamic and Changeable

fruits = ['apple', 'banana', 'cherry']
fruits.append('orange')   Adds 'orange' to the end of the list
fruits[1] = 'blueberry'   Changes 'banana' to 'blueberry'

Tuples — Non-Changeable and Sequenced Objects

colors = ('red', 'green', 'blue')

colors[1] = 'yellow'  This will cause an error since the tuples have been assigned and are thus immutable

Dictionaries: Storing value against a unique key!

person = {'name': 'John', 'age': 30, 'city': 'New York'}
print(person['name'])   Output will be 'John'

person['age'] = 31  Sets the value of age to 31
person['job'] = 'Engineer'  Sets the job for the person as a key-value pair

del person['city']   The key city and its value are removed

What Is Function?

Creating a Function

def function_name(parameter1, parameter2, …):
 Code block that performs an operation
 On the parameters
return result
}

Calling a Function

def add_numbers(a, b):
    return a + b  This is called the function.

 Invoking the function with an argument
result= add_numbers(5, 3)
print(f'the result is: {result}')  The output is logically expected to be equal to 8

The Scope of A Function

Global Variables

x = 10   Variable which is Global

def print_global():
    print(x)   Global variable is being Accessed Inside A Function

print_global()  Result will be 10

Local Variables

def add_two_numbers(a: int, b: int) -> int:
    sum_result: int = a + b  
    return sum_result

x = 10
def global_x_addition():
    global x
    x = 20
global_x_addition()
print(x)

Significance of Scope

Comprehending the "If" Statement

if condition:
   //code block to be executed if that condition turns to be True

age = 20;
if age >= 18:
    print("You are eligible to vote")

The "Else" Statement

number = -5
if number >= 0:
    print("the number is positive")
else:
    print("the number is negative")

score = 85
if score >= 90:
    print("Grade: A")
elif score >= 80:
    print("Grade: B")
elif score >= 70:
    print("Grade: C")
else:
    print("Grade: F")

The Role of Loops

The "For" Loop

for item in sequence:
     Code block to execute for each item

fruits = ["apple", "banana", "cherry"]
for fruit in fruits:
    print(fruit)

The "While" Loop

while expression:
    code which is carried out provided the expression evaluates to True

count = 1
while count <= 5:
    print(count)
    count += 1

What Questions Do You Have Regarding Variables?

age = 25

The Different Data Types in Python

1. Integers (`int`)

count = 10

2. Fear of the Bigger Picture Is Obliterated: Float

height = 5.9

3. Specials Variable-types/pointer (str)

name = "Alice"

4. Cash is a Boolean peddlerous

is_sunny = True

5. Lists

fruits = ["apple", "banana", "cherry"]

6. Dictionaries (`dict`)

person = {"name": "Alice", "age": 25}

7. Tuples

coordinates = (10, 20)

Operators in Python

1. Arithmetic Operators

+   (Addition)
–   (Subtraction)
 (Multiplication)
/ (Division)
// (Floor Division)
%   (Modulus)
   (Exponentiation)

a = 5
b = 3
print(a + b) # Output: 8

2. Comparison Operators

== (Equal to)
!= (Not equal to)
> (Greater than)
< (Less than)
>= (Greater than or equal to)
<= (Less than or equal to)

x = 10
y = 5
print(x > y) # Output: True

3. Logical Operators

print(x < 10 and y > 5)   # Output: True

4. Assignment Operators

x=5
x +=3  # Creates the value of x at 8

5. Membership and Identity Operators

fruits = [ "apple", "banana", "cherry"]
print( "banana" in fruits )  # Output: true

Setting Up Python Environment

Install Python Interpreter

How to use the Python

Instructions on Installing Python on Your Computer

1. Download and Install Python

2. Getting a Text Editor or an Appropriate IDE

3. Installing Python Packages Using Pip

pip install 

pip install numpy

import numpy as np

4. Virtual Environments Creation

python -m venv venv

venvScriptsactivate

source venv/bin/activate

deactivate

6. Recording a Whole New Pay Script for the First Time

The Rise of Python

Notable Characteristics of Python

1. Ease of Use due to English Like syntax

2. It is a high level Programming Language

3. Language that is interpreted

4. Works Across Multiple Platforms

5. Standard module of great scope

6. Integration with Other Libraries and Frameworks

Areas of Usage for Python

1. The development of Websites

2. Science and Analysis of Data

3. Bash and Scripting

How to write an email

Formal vs informal email

Recipient

Subject line

Tone

Language

Greetings

Discuss important things

Complimentary closer

Email Signature

Enclosures

Use email templates

Writing poems

Writing stories

Set goals

Make a study plan

Have an immersive learning experience

Engage with different media

Read magazines, newspapers, and storybooks

Practice speaking

Focus on vocabulary

Master grammar

Go to English-speaking social gatherings

Practice speaking in front of a mirror

Write journal

Use technology