Add beginner, intermediate, and advanced Python

scripts with comments on dependencies

Author: Code4-4

advanced/api_rate_limiter.py

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+# api_rate_limiter.py
+import time
+from functools import wraps
+
+def rate_limiter(max_calls, period):
+    def decorator(func):
+        calls = []
+        @wraps(func)
+        def wrapper(*args, **kwargs):
+            nonlocal calls
+            now = time.time()
+            calls = [call for call in calls if now - call < period]
+            if len(calls) >= max_calls:
+                wait_time = period - (now - calls[0])
+                print(f"Rate limit exceeded. Waiting for {wait_time:.2f} seconds.")
+                time.sleep(wait_time)
+            calls.append(now)
+            return func(*args, **kwargs)
+        return wrapper
+    return decorator
+
+@rate_limiter(max_calls=5, period=10)
+def api_call():
+    print("API call made")
+
+if __name__ == "__main__":
+    for _ in range(10):
+        api_call()
+        time.sleep(1)

advanced/async_web_scraper.py

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+# async_web_scraper.py
+# Dependencies: aiohttp
+# Install with: pip install aiohttp
+
+import aiohttp
+import asyncio
+from bs4 import BeautifulSoup
+
+async def fetch(session, url):
+    async with session.get(url) as response:
+        return await response.text()
+
+async def scrape_website(url):
+    async with aiohttp.ClientSession() as session:
+        html = await fetch(session, url)
+        soup = BeautifulSoup(html, 'html.parser')
+        titles = [title.get_text() for title in soup.find_all('h1')]
+        return titles
+
+if __name__ == "__main__":
+    url = input("Enter the URL of the website to scrape: ")
+    titles = asyncio.run(scrape_website(url))
+    print("Page Titles:")
+    for title in titles:
+        print(title)

advanced/chatbot.py

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+# chatbot.py
+# Dependencies: transformers
+# Install with: pip install transformers
+
+from transformers import pipeline
+
+def chat():
+    chatbot = pipeline('conversational', model='facebook/blenderbot-400M-distill')
+    while True:
+        user_input = input("You: ")
+        if user_input.lower() in ['exit', 'quit']:
+            print("Goodbye!")
+            break
+        response = chatbot(user_input)
+        print(f"Bot: {response['generated_text']}")
+
+if __name__ == "__main__":
+    chat()

advanced/data_visualization.py

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+# data_visualization.py
+# Dependencies: matplotlib, pandas
+# Install with: pip install matplotlib pandas
+
+import matplotlib.pyplot as plt
+import pandas as pd
+
+def visualize_data(csv_file):
+    data = pd.read_csv(csv_file)
+    plt.figure(figsize=(10, 6))
+    data.plot(kind='line', x='Date', y='Value', title='Data Visualization')
+    plt.xlabel('Date')
+    plt.ylabel('Value')
+    plt.grid(True)
+    plt.savefig('visualization.png')
+    plt.show()
+
+if __name__ == "__main__":
+    file = input("Enter the path to the CSV file: ")
+    visualize_data(file)

advanced/web_scraper_advanced.py

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+# web_scraper.py
+# Dependencies: requests, beautifulsoup4
+# Install with: pip install requests beautifulsoup4
+
+import requests
+from bs4 import BeautifulSoup
+import pandas as pd
+
+def scrape_website(url):
+    response = requests.get(url)
+    soup = BeautifulSoup(response.text, 'html.parser')
+    headlines = [h.text for h in soup.find_all('h2')]
+    return headlines
+
+def save_to_csv(data, filename):
+    df = pd.DataFrame(data, columns=['Headlines'])
+    df.to_csv(filename, index=False)
+
+if __name__ == "__main__":
+    url = 'https://news.ycombinator.com/'
+    headlines = scrape_website(url)
+    save_to_csv(headlines, 'headlines.csv')
+    print("Headlines saved to headlines.csv")

beginner/fibonacci_sequence.py

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+# fibonacci_sequence.py
+def fibonacci(n):
+    a, b = 0, 1
+    sequence = []
+    while a < n:
+        sequence.append(a)
+        a, b = b, a + b
+    return sequence
+
+if __name__ == "__main__":
+    num = int(input("Generate Fibonacci sequence up to: "))
+    print(f"Fibonacci sequence up to {num}: {fibonacci(num)}")

beginner/hello_world.py

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+# hello_world.py
+print("Hello, World!")

beginner/number_guessing_game.py

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+# number_guessing_game.py
+import random
+
+def guess_number():
+    number = random.randint(1, 100)
+    attempts = 0
+    while True:
+        guess = int(input("Guess a number between 1 and 100: "))
+        attempts += 1
+        if guess < number:
+            print("Too low!")
+        elif guess > number:
+            print("Too high!")
+        else:
+            print(f"Congratulations! You've guessed the number {number} in {attempts} attempts.")
+            break
+
+if __name__ == "__main__":
+    guess_number()

beginner/number_to_words.py

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+# number_to_words.py
+def number_to_words(n):
+    ones = ["Zero", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine"]
+    teens = ["Ten", "Eleven", "Twelve", "Thirteen", "Fourteen", "Fifteen", "Sixteen", "Seventeen", "Eighteen", "Nineteen"]
+    tens = ["Twenty", "Thirty", "Forty", "Fifty", "Sixty", "Seventy", "Eighty", "Ninety"]
+
+    if 0 <= n < 10:
+        return ones[n]
+    elif 10 <= n < 20:
+        return teens[n - 10]
+    elif 20 <= n < 100:
+        return tens[n // 10 - 2] + ('' if n % 10 == 0 else '-' + ones[n % 10])
+    else:
+        return "Number out of range"
+
+if __name__ == "__main__":
+    number = int(input("Enter a number between 0 and 99: "))
+    print(f"Number in words: {number_to_words(number)}")

beginner/prime_number_checker.py

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+# prime_number_checker.py
+def is_prime(n):
+    if n <= 1:
+        return False
+    for i in range(2, int(n**0.5) + 1):
+        if n % i == 0:
+            return False
+    return True
+
+if __name__ == "__main__":
+    num = int(input("Enter a number to check if it's prime: "))
+    if is_prime(num):
+        print(f"{num} is a prime number.")
+    else:
+        print(f"{num} is not a prime number.")