Learn all about type hinting (AKA type annotation) in this tutorial by Mike Driscoll What You’ll Learn Pros and Cons of Type Hinting Built-in Type Hinting / Variable Annotation Collection Type Hinting Hinting Values That Could be None Type Hinting Functions What To Do When Things Get Complicated Classes Decorators Aliasing Other Type Hints This […]
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In this video tutorial you will learn the following: Creating a function Calling a function Passing arguments Type hinting your arguments Passing keyword arguments Required and default arguments *args and **kwargs Positional-only arguments Scope Related Merch Python 101 Video Series Python 101 – 2nd Edition: Amazon (paperback / Kindle) Gumroad (eBook – PDF, mobi, epub)
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Assignment expressions were added to Python in version 3.8. The general idea is that an assignment expression allows you to assign to variables within an expression. The syntax for doing this is: NAME := expr This operator has been called the “walrus operator”, although their real name is “assignment expression”. Interestingly, the CPython internals also
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Python provides a couple of really nice modules that you can use to craft emails with. They are the email and smtplib modules. Instead of going over various methods in these two modules, you’ll spend some time learning how to actually use these modules. Specifically, you’ll be covering the following: The basics of emailing How
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In this video tutorial, you will learn how exception handling works in Python. Specifically, you will learn the following: Common exceptions Handling exceptions Raising exceptions Examining exception objects Using the finally statement Using the else statement If you prefer to read a tutorial, you might be interested in this: Python 101 – Exception Handling Want
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Python has the concept of the virtual environments built-in to the language. A Python virtual environment is an environment where you can install 3rd party packages for testing without affecting the system Python installation. Each virtual environment has its own set of installed packages and, depending on the virtual environment and how it’s set up,
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The business world uses Microsoft Office. Their spreadsheet software solution, Microsoft Excel, is especially popular. Excel is used to store tabular data, create reports, graph trends, and much more. Before diving into working with Excel with Python, let’s clarify some special terminology: Spreadsheet or Workbook – The file itself (.xls or .xlsx). Worksheet or Sheet
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JavaScript Object Notation, more commonly known as JSON, is a lightweight data interchange format inspired by JavaScript object literal syntax. JSON is easy for humans to read and write. It is also easy for computers to parse and generate. JSON is used for storing and exchanging data in much the same way that XML is
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In this tutorial, you will learn about Python’s comprehensions, like the popular list comprehension and the dictionary comprehension. Would you like to learn more about Python? Python 101 – 2nd Edition Purchase now on Leanpub or Amazon
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In this tutorial, you will learn how to use for and while loops in Python. Specifically, you’ll learn how to: Create a for loop Loop over a string Loop over a dictionary Extract multiple values from a tuple Use enumerate with loops Create a while loop Breakout of a loop Use continue Use else with
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In this video, you will learn how to create conditional statements using the Python programming language. Specifically, you will learn about the following topics: Comparison operators Creating a simple conditional Branching conditional statements Nesting conditionals Logical operators Special operators
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In this video tutorial, you will learn about the following: Create dictionaries Access dictionaries Dictionary methods Modifying dictionaries Deleting from your dictionary If you prefer to read your tutorials, then you can check out this one: Python 101 – Learning About Dictionaries
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Mistakes in your code are known as “bugs”. You will make mistakes. You will make many mistakes, and that’s totally fine. Most of the time, they will be simple mistakes such as typos. But since computers are very literal, even typos prevent your code from working as intended. So they need to be fixed. The
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In this tutorial, you will learn about Python’s tuple data type: If you prefer to read rather than watch, then you should check out Python 101 – Learning About Tuples Get the Jupyter Notebook on Github
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There are times when you are writing an application and you need to run another application. For example, you may need to open Microsoft Notepad on Windows for some reason. Or if you are on Linux, you might want to run grep. Python has support for launching external applications via the subprocess module. The subprocess
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