Python Installation

sudo apt-get update

sudo apt-get install python3.6

Check the version

python3 --version

Why their is need for Python in DevOps? If we have yaml for scripting?

• Python's versatility, extensive libraries, and ease of use make it a preferred choice in DevOps.

• Python's automation and scripting capabilities streamline DevOps tasks.

• Python's data analysis libraries facilitate insights into system performance and resource utilization.

• Python integrates seamlessly with popular DevOps tools and frameworks.

• Python's versatility extends to custom tools, web applications, and large-scale deployments.

• Python's code readability enhances collaboration and maintainability.

Data Type In Python

Python supports several built-in data types. Here's a list of some commonly used data types in Python:

1. Numeric Types:

   • int: Integer type (e.g., 42)

   • float: Floating-point type (e.g., 3.14)

   • complex: Complex number type (e.g., 1 + 2j)

2. Sequence Types:

   • str: String type (e.g., "Hello, World!")

   • list: List type (e.g., [1, 2, 3])

   • tuple: Tuple type (e.g., (1, 2, 3))

   • range: Represents a range of values

3. Text Type:

   • str: String type for handling textual data

4. Set Types:

   • set: Unordered collection of unique elements

   • frozenset: Immutable version of a set

5. Mapping Type:

   • dict: Dictionary type (e.g., {'key': 'value'})

6. Boolean Type:

   • bool: Boolean type representing True or False

7. None Type:

   • None: Represents the absence of a value or a null value

8. Binary Types:

   • bytes: Immutable sequence of bytes

   • bytearray: Mutable sequence of bytes

   • memoryview: A view object that exposes an array's buffer interface

code:-

# Integer
integer_var = 42
print("Integer Variable:", integer_var)

# Float
float_var = 3.14
print("Float Variable:", float_var)

# String
string_var = "Hello, World!"
print("String Variable:", string_var)

# List
list_var = [1, 2, 3, 4, 5]
print("List Variable:", list_var)

# Tuple
tuple_var = (10, 20, 30, 40, 50)
print("Tuple Variable:", tuple_var)

# Dictionary
dict_var = {'a': 1, 'b': 2, 'c': 3}
print("Dictionary Variable:", dict_var)

# Set
set_var = {1, 2, 3, 4, 5}
print("Set Variable:", set_var)

# Basic tasks

# Integer and Float operations
result = integer_var + float_var
print("Integer + Float:", result)

# String concatenation
new_string = string_var + " Have a nice day!"
print("Concatenated String:", new_string)

# List manipulation
list_var.append(6)
list_var.remove(2)
print("Modified List:", list_var)



# Dictionary operations
dict_var['d'] = 4
del dict_var['a']
print("Modified Dictionary:", dict_var)

# Set operations
set_var.add(6)
set_var.remove(3)
print("Modified Set:", set_var)

Here '#' is used for commenting the line.

For more example Visit this github repo:- https://github.com/sidharthhhh/python

User Inputs, Control Statements, Loops

User Inputs

To take user inputs in Python, you can use the input() function. By default, input() returns a string, so you'll need to convert it to the desired data type (int, float, or string) using int(), float(), or leave it as is.

# Taking an integer input
user_input_int = int(input("Enter an integer: "))

# Taking a floating-point input
user_input_float = float(input("Enter a float: "))

# Taking a string input
user_input_string = input("Enter a string: ")

# Printing the inputs
print(f"You entered an integer: {user_input_int}")
print(f"You entered a float: {user_input_float}")
print(f"You entered a string: {user_input_string}")

Control statement

Certainly! Here are examples of if, else, elif, and nested if statements in Python

if statement:

# Example 1: Checking if a number is positive
num = 10

if num > 0:
    print("The number is positive.")

elif statement:

# Example 3: Determining the grade based on a score
score = 75

if score >= 90:
    print("Grade A")
elif score >= 80:
    print("Grade B")
elif score >= 70:
    print("Grade C")
elif score >= 60:
    print("Grade D")
else:
    print("Grade F")

Nested if statements:

# Example 4: Nested if statements to determine eligibility for a loan
income = 50000
credit_score = 700

if income >= 60000:
    if credit_score >= 700:
        print("You are eligible for a loan with a low interest rate.")
    else:
        print("You are eligible for a loan with a higher interest rate.")
else:
    print("You are not eligible for a loan.")

Loops

For loops

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

While Loops:

count = 0
while count < 5:
    print(count)
    count += 1

Break and Continue:

Use break to exit a loop prematurely, and continue to skip the current iteration.

for i in range(10):
    if i == 5:
        break
    print(i)

for i in range(10):
    if i == 5:
        continue
    print(i)

Looping through Dictionaries

person = {'name': 'John', 'age': 30, 'city': 'New York'}
for key, value in person.items():
    print(f'{key}: {value}')

Loop Control with Else

for i in range(5):
    print(i)
else:
    print("Loop completed without a break.")

List Comprehensions

numbers = [i for i in range(10) if i % 2 == 0]

SAMPLE PROGRAM

# User inputs
name = input("Enter your name: ")
age = int(input("Enter your age: "))

# Control statement (if-else)
if age >= 18:
    print(f"Hello {name}! You are eligible to vote.")
else:
    print(f"Hello {name}! You are not yet eligible to vote. You can vote in {18 - age} years.")

# For loop
print("Printing numbers from 1 to 5 using a for loop:")
for i in range(1, 6):
    print(i)

# While loop
num = int(input("Enter a number: "))
fact = 1
i = 1

while i <= num:
    fact *= i
    i += 1

print(f"The factorial of {num} is: {fact}")

Conclusion

Here we discuss about python Installation, datatype, control flow statement, loops .

Happy learning!