I wrote a book about creating GUIs with #Python a couple of years ago.

In it, I created a SQLite database viewer application with #wxPython in under 100 lines of code

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Here is the SQLite database viewer I created with #Python and #wxPython for the book

Note: This code should work fine on Windows, Mac and Linux
You can get the code for my SQLite database viewer on GitHub here:

github.com/driscollis/app…
You can check out the book this example came from on @leanpub here:

leanpub.com/creatingapplic…
Or you can get a paperback copy on Amazon:

amazon.com/dp/0996062890

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More from @driscollis

4 Dec
A lot of people use #Python for automation. Let's talk about some of the packages you can use this task!

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PyAutoGUI is useful if you need to control the mouse and keyboard on your PC with Python

You can use PyAutoGUI to fill out forms, take screenshots and much more

pyautogui.readthedocs.io/en/latest/
Pywinauto is also for controlling the mouse and keyboard, but is specifically targeted at Windows

pywinauto.readthedocs.io/en/latest/
Read 8 tweets
3 Dec
Let's talk about type hinting in #Python

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Type hinting is not enforced by Python. You can enforce it with outside packages, such as Mypy or with your Python IDE
Type hinting is most useful when you have a large team you are working with or with a large codebase.

Type hinting is also useful for introspection when creating Python packages
Read 6 tweets
19 Nov
Today we are going to talk about the basics of unit testing in #Python

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The Python programming language includes built-in packages for testing:

🐍 doctest
🐍 unittest
I already did a thread on Python's `doctest`:

Read 13 tweets
18 Nov
Python comes with its own built-in debugger called `pdb`.

Let's talk about that in a mini-thread!

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`pdb` stands for Python debugger. It is a built-in part of Python's standard library

Here is a link to the documentation:

docs.python.org/3/library/pdb.…
To start debugging code with `pdb`, you need to write some code.

Here's the code you'll be using:
Read 17 tweets
17 Nov
One big gotcha when it comes to #Python decorators is that the decorator will covertly replace the function's name and docstring with its own (πŸ§΅πŸπŸ‘‡)

Check out the following example Image
When you run the decorated code in the previous tweet, you will see that the decorated function's name and docstring have disappeared! Image
You may be wondering, why do I care if a function's name and docstring are replaced?

The reason this is important is that your introspection won't work correctly anymore. If you run Python's `help()` built-in against your decorated function, it will give you the wrong info
Read 7 tweets
17 Nov
#Python has had the concept of context managers for a loooong time!

Let's talk about context managers again!

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The `with` statement, which is the normal way for working with context managers, was added back in Python 2.5!

Here is a pretty common example of using a context manager: Image
The beauty of a context manager is that they allow you to do some setup and teardown automatically.

The downside is that is abstracted away and can sometimes make the code less obvious when debugging
Read 8 tweets

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