Husucker Proxy

Parsing math expressions correctly involves converting mathematical expressions from their human-readable form into a format that a computer can understand and evaluate. A common approach is to use a parser or library designed for mathematical expressions.

In Python, you can use the sympy library, which provides powerful symbolic mathematics capabilities, including expression parsing and evaluation. Here's an example:

from sympy import sympify, symbols

# Define symbols
x, y = symbols('x y')

# Parse math expressions
expression1 = sympify("2*x + 3*y")
expression2 = sympify("sin(x) + cos(x)")

# Evaluate expressions
result1 = expression1.subs({x: 1, y: 2})
result2 = expression2.subs(x, 0)

print("Result 1:", result1)
print("Result 2:", result2)

In this example, sympify is used to parse the mathematical expressions. You can then substitute values for variables using the subs method.

If you need a more general-purpose parser, you can use the pyparsing library. Here's a basic example:

from pyparsing import Word, nums, operatorPrecedence, opAssoc

# Define grammar for basic math expressions
integer = Word(nums).setParseAction(lambda t: int(t[0]))
variable = Word("xy")
operand = integer | variable
expr = operatorPrecedence(
    operand,
    [
        ("+", 2, opAssoc.LEFT),
        ("-", 2, opAssoc.LEFT),
        ("*", 3, opAssoc.LEFT),
        ("/", 3, opAssoc.LEFT),
    ],
)

# Parse math expressions
expression1 = expr.parseString("2*x + 3*y")
expression2 = expr.parseString("sin(x) + cos(x)")

print("Parsed Expression 1:", expression1)
print("Parsed Expression 2:", expression2)

This example uses pyparsing to define a grammar for basic math expressions with addition, subtraction, multiplication, and division. You can customize the grammar based on your specific needs.

Choose the library that best fits your requirements, whether it's for symbolic mathematics (like sympy) or general-purpose expression parsing (like pyparsing). Always consider error handling and validation when working with user-inputted expressions.

To enable responsive design mode in Firefox using Selenium, you can use the webdriver.FirefoxOptions() class and set the desired options for responsive design. Here's an example in Python:

from selenium import webdriver

# Create Firefox options
firefox_options = webdriver.FirefoxOptions()

# Enable responsive design mode
firefox_options.add_argument('--start-maximized')  # Start the browser in maximized mode
firefox_options.add_argument('--width=800')  # Set the initial width
firefox_options.add_argument('--height=600')  # Set the initial height

# Create the WebDriver instance with the specified options
driver = webdriver.Firefox(options=firefox_options)

# Navigate to a website
driver.get('https://example.com')

# Continue with your Selenium script...

# Close the browser when done
driver.quit()

In this example:

• --start-maximized: Opens the browser window in maximized mode.
• --width=800: Sets the initial width of the browser window to 800 pixels.
• --height=600: Sets the initial height of the browser window to 600 pixels.

You can adjust the width and height values based on your specific requirements.

Please note that the responsiveness of the design is primarily determined by the CSS media queries and how the website is designed to handle different viewport sizes. Changing the browser window size using Selenium does not necessarily trigger responsive behavior unless the website's CSS is designed to respond to changes in viewport size.

If you want to simulate specific devices with predefined sizes, you can use the mobile_emulation capability in Chrome. However, this is specific to Chrome and not available in Firefox.

from selenium import webdriver

chrome_options = webdriver.ChromeOptions()
chrome_options.add_experimental_option('mobileEmulation', {'deviceName': 'iPhone X'})

driver = webdriver.Chrome(chrome_options=chrome_options)
driver.get('https://example.com')

# Continue with your Selenium script...

driver.quit()

Keep in mind that responsive design testing is often more effectively done using tools built into browsers (e.g., Chrome DevTools) or specialized testing frameworks rather than relying solely on Selenium.

Combining Selenium with a Telegram Bot allows you to create an automated system that can interact with web pages and send updates to a Telegram chat. To achieve this, you'll need to follow these steps:

Create a Telegram Bot and get the API token.

Set up a Telegram Bot using the API token.

Use Selenium to interact with the web pages.

Send updates from the Selenium script to the Telegram Bot.

Here's a step-by-step guide:

Create a Telegram Bot and get the API token:

- Start a new chat with the BotFather (@BotFather) on Telegram.

- Send the command /newbot and follow the instructions to create a new bot.

- Note down the bot's username (e.g., YourBotName).

- Send the command /setname YourBotName to set the bot's name.

- Send the command /token to receive the API token. Save the API token securely.

Set up a Telegram Bot using the API token:

- Install a Telegram bot library, such as python-telegram-bot: pip install python-telegram-bot.

- Create a new Python script and import the required libraries:

from telegram.ext import Updater, CommandHandler, MessageHandler, Filters
import logging

logging.basicConfig(format='%(asctime)s - %(name)s - %(levelname)s - %(message)s', level=logging.INFO)

Set up the Telegram Bot with the API token:

API_TOKEN = "your_telegram_bot_api_token"
updater = Updater(API_TOKEN, use_context=True)
dispatcher = updater.dispatcher

Create a function to handle incoming messages:

def echo(update, context):
    context.bot.send_message(chat_id=update.effective_chat.id, text=update.message.text)

Add a command handler and message handler to the dispatcher:

start_cmd = CommandHandler('start', echo)
dispatcher.add_handler(start_cmd)

message_handler = MessageHandler(Filters.text & ~Filters.command, echo)
dispatcher.add_handler(message_handler)

Start the bot:

updater.start_polling()
updater.idle()

Use Selenium to interact with the web pages:

Create a Selenium script to interact with the web pages as needed. For example, you can use the script to scrape data, log in to a website, or perform other actions.

Send updates from the Selenium script to the Telegram Bot:

Modify the echo function in the Telegram Bot script to accept data from the Selenium script and send it as an update. You can pass the data as a string or use other formats like JSON.

Here's an example of sending data as a string:

def echo(update, context):
    data = context.bot.send_message(chat_id=update.effective_chat.id, text="Received data:")
    context.bot.send_message(chat_id=update.effective_chat.id, text=data)

And here's an example of sending data as JSON:

import json

def echo(update, context):
    data = context.bot.send_message(chat_id=update.effective_chat.id, text="Received data:")
    data_json = json.dumps(data)
    context.bot.send_message(chat_id=update.effective_chat.id, text=data_json)

Now, when you run both the Selenium script and the Telegram Bot script simultaneously, the bot will receive updates with the data from the Selenium script and send it to the chat.

Remember to replace "your_telegram_bot_api_token" with your actual API token. Also, ensure that the bot has the necessary permissions to send messages in the chat where you want to receive updates.

The first thing to do is to find a suitable proxy server with an IP address and port. Then you should check whether the proxy works by means of a special program or an online service providing such services. The next step is to configure the type of browser you are going to use. The procedure of setting itself depends on the type of browser and does not take much time. After correctly entering the IP address, username and password of the proxy server, don't forget to save the changes you made.

You can check it with the ping command from the command line in Windows. It is enough to enter it, with a space - the data of the proxy server (including the number of the port used) and press Enter. The reply message will tell you whether or not you have received a reply from the remote server. If not, the proxy is unavailable, respectively.