Can you explain how pyautogui works and some examples to get me started with it?
PyAutoGUI is a Python module for automating GUI interactions and automating actions on a computer, such as moving the mouse, clicking buttons, typing, and reading the screen. It uses the GUI libraries of the underlying operating system to control the mouse and keyboard.

Here are some examples to get you started with PyAutoGUI:

1. Moving the mouse: You can move the mouse to a specific position on the screen using the moveTo method. For example, the following code will move the mouse to the position (100, 100):

import pyautogui
pyautogui.moveTo(100, 100)

2. Clicking buttons: You can simulate a mouse click using the click method. For example, the following code will simulate a left-click at the current mouse position:

import pyautogui
pyautogui.click()

3. Typing: You can simulate keyboard input using the press and typewrite methods. For example, the following code will type the text Hello, World! into the currently active window:

import pyautogui
pyautogui.typewrite(Hello, World!)

4. Screenshots: You can take a screenshot of the entire screen or a specific region using the screenshot method. For example, the following code will take a screenshot of the entire screen and save it to a file named screenshot.png:

import pyautogui
screenshot = pyautogui.screenshot()
screenshot.save(screenshot.png)

These are just a few examples of what you can do with PyAutoGUI. With its simple and intuitive API, you can automate a wide range of GUI interactions and perform complex tasks with just a few lines of code.

Here is a great video tutorial on the topic if you are interested: https://www.youtube.com/watch?v=3PekU8OGBCA
As always, the official documentation is the most exhaustive resource for anything in case you get stuck: https://pyautogui.readthedocs.io/en/latest/
What are good alternatives to pyautogui?
There are several alternatives to PyAutoGUI for automating GUI tasks:

1.  AutoHotkey: a free, open-source scripting language for Windows that allows you to automate repetitive tasks.
    
2.  Sikuli: an open-source tool that uses image recognition to automate GUI tasks.
    
3.  Pywinauto: a set of Python modules to automate GUI testing of Windows GUI applications.
    
4.  Robot Framework: a generic test automation framework that can be used for GUI testing with the help of library extensions.
    
5.  WinAppDriver: a Windows Application Driver for Windows desktop applications, used for UI Test Automation.
    

These are just a few examples. The best alternative for you will depend on your specific needs and requirements.