Python Chat

Live webcasts for #Python developers.

Tweets by @treyhunner.

[Trey Hunner @treyhunner]

Does your company have an individual training budget that expires at the end of year? 💸

If you use #Python at work, sign up for the @PythonMorsels All Access plan and submit your training reimbursement before year end. 🐍💼

https://t.co/0YrJDd1jZ3

[Trey Hunner @treyhunner]

Managing a #Python team and want to chat about your team's skill trajectory?

I have ideas & opinions! I'd love to chat about:
1. On-boarding new hires 📋
2. Fostering kind code style discussions 🐕
3. Learning from each other regularly 👩‍🏫
4. Team learning in general 🤔

DM me 💬

[Trey Hunner @treyhunner]

New blog post: What's great about #Python 3.10?

There's some fun new features, but improved error messages are *the* winning Python 3.10 feature.

https://t.co/6npvBe5sOU

[Trey Hunner @treyhunner]

When we use keyword/named arguments, it's the name that matters, not the position

Read the full article: Keyword (Named) Arguments in Python: How to Use Them
▸ https://t.co/1SjTH1gJPc

#Python

[Trey Hunner @treyhunner]

Our class instantiation syntax in Python is the same as our function call syntax.

Instead of "new SomeClass()" we write "SomeClass()".

Because of this we use the word "function" in a fuzzy way: "function" is often used to mean "callable".

https://t.co/tawEdwYt0x

[Python Morsels @PythonMorsels]

In #Python, you can pass function objects as an argument to another function.

In fact, some of the built-in functions, like sorted, specifically accept functions as an argument.

https://t.co/QWTfJtYDzi

[Python Morsels @PythonMorsels]

You can break up long lines of #Python code with implicit line continuation. PEP 8 recommends relying on implicit line continuation instead of putting a \ at the end of lines to continue them.

https://t.co/2j6YvxxTs3

[Python Morsels @PythonMorsels]

If you're new to list comprehensions in #Python, I recommend writing your comprehensions by copy-pasting your way from a "for" loop. This way you can anchor your understanding of comprehensions on your existing knowledge of "for" loops.

https://t.co/Otrp481tlg

[Python Morsels @PythonMorsels]

What is a list comprehension in #Python? What are they used for and how are they different from a for loop?

https://t.co/QdnDjvIVV0

[Trey Hunner @treyhunner]

Something folks often ask me in my Python trainings: are immutable objects the same as constants? 🤔

They're not! 😮 Immutable objects stop you from mutating an object but constants stop you from assigning to a variable (remember: variables are pointers in Python). 🐍🍪

[Python Morsels @PythonMorsels]

A callable is an object that you can call. Functions are callables in #Python, but so are classes (many of the "built-in functions" are actually classes).

https://t.co/4pPxKnELIi

[Python Morsels @PythonMorsels]

Need an attribute that updates its value automatically? Use a property!

In the #Python world, we tend to prefer properties over getter methods.

https://t.co/YAqLn5FJLt

[Python Morsels @PythonMorsels]

We have immutable objects in Python but we don't have constant variables.

The UPPERCASE_CONVENTION for constants is just a naming convention in #Python. It doesn't stop variables from being re-assigned.

https://t.co/GvqjyiljH4

[Python Morsels @PythonMorsels]

Checking an object's truthiness checks for non-emptiness and non-zero-ness.

FYI: the #Python docs don't mention "truthy" or "falsey" even once. The docs call it "truth value testing" but Pythonistas rarely use that phrase colloquially.

https://t.co/1QY2qqVki9

[Python Morsels @PythonMorsels]

Instead of using hard-coded indices to get tuple elements, use tuple unpacking to give descriptive names to each item. Important items should have a name instead of a number. #Python

https://t.co/fbLOIdU2lG

[Python Morsels @PythonMorsels]

When you import a module in #Python, you'll get access to a module object with attributes representing each of the variables in that module.

https://t.co/yQSSxtb5SS

[Trey Hunner @treyhunner]

Let's look at different techniques for counting the number of times things appear in a list.

Read more 👉 https://t.co/PzgxGz04xg

#python

[Python Morsels @PythonMorsels]

Parentheses in #Python's class & function definitions mean different things

In a function definition, parentheses after the name denote the functions' arguments.

In a class definition, parentheses after the name denote the class' parent classes.

https://t.co/3yPqpE1QFQ

[Trey Hunner @treyhunner]

Classes, modules, and functions are all mutable objects in #Python 🤯

[Python Morsels @PythonMorsels]

The first method you'll see in most #Python classes is the init method.

This isn't a constructor method but an initializer method (because by the time init is called, a new class instance has already been "constructed")

https://t.co/eJ2kQmk2Rt