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Rodrigo 🐍📝

@mathsppblog

29 Sep

I challenged you 🏆...

You delivered 💪!

I asked you to implement the sign function in Python 🐍.

Now I'll go over some alternatives and tell you what I like ✅ and dislike ❌ about them.

I'll also tell you which one I think is the best, most Pythonic ✨ one.

👇🧵

https://twitter.com/mathsppblog/status/1442042804398665732

By the way, for reference, here is the original challenge:

https://twitter.com/mathsppblog/status/1442042804398665732

@dabeaz

Let's start with the “basic” `if: ... elif: ... else: ...` approach first.

Gets the job done, is simple, and is easy to ready.

Funnily enough, the only one to share that solution was a _very_ seasoned Python 🐍 programmer, author and trainer, @dabeaz 🙃

Now, a couple of notes:

Read 28 tweets

Rodrigo 🐍📝

@mathsppblog

28 Sep

Interested in improving your Python 🐍 skills?

🤔 If you are, have you learned about conditional expressions?

Here is a MEGA thread 👇🧵 teaching you almost everything there is to know about conditional expressions!

I will include a bunch of examples 🖼, so don't worry!

https://twitter.com/mathsppblog/status/1442802770671804416

This is the follow-up to my experiment from earlier today.

I tried teaching you about conditional expressions without words 😶.

Here is the original thread:

https://twitter.com/mathsppblog/status/1442802770671804416

Alright, so conditional expressions aren't that hard, really.

It is just an expression: a piece of code that evaluates to a result.

But then, it is tied to a condition: depending on whether the condition is truthy or falsy, the final result changes.

Check the function below:

Read 30 tweets

Rodrigo 🐍📝

@mathsppblog

26 Sep

Have you heard that Python 🐍 3.10 will be released soon?

Are you ready for when it drops 💣🔥?

Python 3.10 will ship with the new ✨ match statement, and I created a cheatsheet just for that.

This is also a thread 👇🧵 that breaks it down and explains everything:

The cheatsheet is free and teaches you 12+ things about the new `match` statement.

From the basics, to object destructuring, to wildcards, among other things.

Get it from the link 👇, and keep reading below to learn all about the `match` statement.

mathspp.gumroad.com/l/cheatsheet_m…

In its most basic form, a `match` statement kind of resembles an `if` statement.

That's what most of the “switch” or “match” statements in other languages do: a series of `if` / `elif` / `else` statements.

Even a basic `case` is powerful: use `|` to separate multiple options.

Read 23 tweets

Rodrigo 🐍📝

@mathsppblog

25 Sep

What's the BEST way to learn Python 🐍?

I've been writing Python for 10 years and taught 100s of people.

Here is a FAQ with actionable advice 👇🧵

But everyone is different, so share your thoughts as well 👇💬 to help as many as possible!

🐍 “How do I start learning Python?”

Well, I think the answer to this question greatly depends on whether you have (considerable) programming experience with another language or not.

That's because “learning Python” can mean ”learn the syntax of the language”, but...

... it can also mean ”learn how to think like a programmer”.

And, in my opinion, this is something very fundamental that you have to understand!

Being a programmer is also about having that programmer mindset.

Worry not, you can learn it 😊

Read 35 tweets

Rodrigo 🐍📝

@mathsppblog

24 Sep

Do you want to master Python 🐍 list comprehensions?

Do you want to become more proficient working with lists in Python 🐍?

If you answered with “yes”, then here's a cheatsheet of mine to help you out.

This is also a thread 👇🧵 that breaks it down and explains everything:

First off, here is the anatomy of a list comprehension.

There's 4 parts to a list comp:
1. enclosing brackets to create the list [];
2. expression that transforms your data;
3. `for` iteration over the initial data;
4. (optional!) condition to filter some data.

Do list comprehensions look confusing?

Maybe.

But that's because you didn't realise that list comprehensions have equivalent `for` loops!

The coloured boxes below show the equivalent bits in the list comp and in the `for` loop:

Read 19 tweets

Rodrigo 🐍📝

@mathsppblog

23 Sep

Do you know what the Python 🐍 `type` is?

But do you _really_ know what it is?

Here is a valuable thread that will give you insights into what `type` is and does.

Let's go 👇🧵

What does `type` do?

You might say that `type` takes an object and returns the type of the argument.

Here are some examples:

Fine, so `type` is a function!

Or is it..?

Take a look at the example above.

`sum` is a built-in function and `type(sum)` returned “built-in function or method”.

So, logically, if `type` is a (built-in) function, the type of `type` should give the same thing:

Read 14 tweets

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