Exploring Popular Libraries

Tour the most popular Python libraries: requests, click, python-dotenv, schedule, and more. See what's possible beyond the standard library.

15 min•By Priygop Team•Updated 2026

Popular Libraries

# 1. requests - HTTP library (the most downloaded package!)
# import requests
# response = requests.get("https://api.github.com")
# print(response.status_code)
# print(response.json())

# 2. click - Beautiful CLI interfaces
# import click
# @click.command()
# @click.option('--name', prompt='Your name')
# def hello(name):
#     click.echo(f'Hello {name}!')

# 3. python-dotenv - Environment variables
# from dotenv import load_dotenv
# load_dotenv()
# api_key = os.getenv("API_KEY")

# 4. Rich - Beautiful terminal output
# from rich import print
# from rich.table import Table

# Demo: simulating popular library usage
print("=== Popular Library Examples ===\n")

# Simulated requests
print("1. requests - HTTP calls:")
print("   response = requests.get('https://api.example.com')")
print("   data = response.json()")

# Simulated CLI
print("\n2. click - CLI framework:")
print("   @click.command()")
print("   def hello(name): click.echo(f'Hello {name}!')")

# Simulated data analysis
print("\n3. pandas - Data Analysis:")
print("   df = pd.read_csv('data.csv')")
print("   print(df.describe())")

# Categories
categories = {
    "Web": ["requests", "flask", "fastapi", "httpx"],
    "Data": ["pandas", "numpy", "matplotlib", "seaborn"],
    "Testing": ["pytest", "unittest", "coverage"],
    "CLI": ["click", "typer", "argparse", "rich"],
    "Automation": ["schedule", "paramiko", "fabric"],
}
print("\n=== By Category ===")
for cat, libs in categories.items():
    print(f"  {cat}: {', '.join(libs)}")

Tip

Start with requests (HTTP), pandas (data), flask (web), pytest (testing). These four cover most Python use cases.

Diagram

Loading diagram…

Module = file, Package = folder + __init__.py, Library = pip.

Common Mistake

Warning

Installing too many packages creates dependency conflicts. Use only what you need. Check package maintenance status before adopting.

Quick Quiz

Practice Task

Note

(1) Install and use requests to fetch a URL. (2) Try rich for beautiful terminal output. (3) Explore one new package from PyPI.

Topics in This Module

Popular Libraries

# 1. requests - HTTP library (the most downloaded package!)
# import requests
# response = requests.get("https://api.github.com")
# print(response.status_code)
# print(response.json())

# 2. click - Beautiful CLI interfaces
# import click
# @click.command()
# @click.option('--name', prompt='Your name')
# def hello(name):
#     click.echo(f'Hello {name}!')

# 3. python-dotenv - Environment variables
# from dotenv import load_dotenv
# load_dotenv()
# api_key = os.getenv("API_KEY")

# 4. Rich - Beautiful terminal output
# from rich import print
# from rich.table import Table

# Demo: simulating popular library usage
print("=== Popular Library Examples ===\n")

# Simulated requests
print("1. requests - HTTP calls:")
print("   response = requests.get('https://api.example.com')")
print("   data = response.json()")

# Simulated CLI
print("\n2. click - CLI framework:")
print("   @click.command()")
print("   def hello(name): click.echo(f'Hello {name}!')")

# Simulated data analysis
print("\n3. pandas - Data Analysis:")
print("   df = pd.read_csv('data.csv')")
print("   print(df.describe())")

# Categories
categories = {
    "Web": ["requests", "flask", "fastapi", "httpx"],
    "Data": ["pandas", "numpy", "matplotlib", "seaborn"],
    "Testing": ["pytest", "unittest", "coverage"],
    "CLI": ["click", "typer", "argparse", "rich"],
    "Automation": ["schedule", "paramiko", "fabric"],
}
print("\n=== By Category ===")
for cat, libs in categories.items():
    print(f"  {cat}: {', '.join(libs)}")

Topics in This Module