Rodrigo ๐๐
@mathsppblog
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Take your Python ๐ skills to the next level ๐! @mathsppblog @fosstodon .org
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I learned Python ๐ on the Internet for free.
That's why my Pydon'ts book is free:
๐ +300 pages
๐ +25 chapters
๐ Available for $0
๐ Always growing
I can't do the hard work for you, but I can make it *easier*!
Link on my profile!
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This is a complete diagram of how you define a function in Python ๐
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Hey there ๐
If you are interested in
๐ Python
๐ป Programming
๐ Python
๐ง Mathematics
๐ค Machine Learning
๐ and some more Python,
Follow me. โ
I share daily ๐
content that you won't want to miss.
(โ DISCLAIMER: Sometimes I also tweet about Python ๐)
25
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Do you want to take your Python ๐ skills to your next level?
I can't do the hard work for you, but I can make it *easier*!
That's why I am working on a Python book that teaches you the core language.
๐ +400 pages
๐ +25 chapters
๐ Available for $0
Link on my profile! ๐
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As a Python ๐ย programmer, I spend my day inside my IDE.
After all, it's my job!
Here are 6 VS Code
@code
shortcuts that save me HOURS every week. ๐
A thread with video examples. ๐
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All Python ๐ย developers should know about this module.
The module `collections` will make you 10x more productive*! ๐
What is your favourite `collections` tool?
Let me show you some of its goodies in this thread. ๐
(*Actual numbers may vary. ๐คก)
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Hey there ๐
If you are interested in
๐ Python
๐ป Programming
๐ Learning in public
๐ Python
๐ง Mathematics
๐ค Machine Learning
๐ and more Python,
Follow me. โ
I share daily ๐
content that you won't want to miss.
(โ DISCLAIMER: Sometimes I also tweet about Python ๐)
25
97
1K
Hi ๐ if you are interested in:
๐ Python
๐ป Programming
๐ Python
๐ง Mathematics
๐ค Machine Learning
๐ and some more Python,
Follow me. โ
I'm planning on using Twitter to share a lot of content that you won't want to miss. ๐
24
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Did you know that Python ๐ย has over 240 modules in the standard library?
Here is a MEGA thread ๐งตwith a super high level overview of those modules...
... but before that, I challenge you to name as many modules by heart as possible! ๐ฌ๐
Let's see who gets more!
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Here is a thing I see beginners do all the time when learning computer programming.
They use a conditional statement (an if-statement) to decide whether to return `True` or `False` from a function.
Don't use a conditional, RETURN the condition ๐
Example in Python ๐:
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How did I not know this?!
You can style your Python ๐ matplotlib plots like an
@xkcd
comic!
I think I'll be using this for presentations from now on! ๐
What do you think?
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Do you want to master Python ๐ list comprehensions?
Do you want to become more proficient working with lists in Python ๐?
If you answered with โyesโ, then here's a cheatsheet of mine to help you out.
This is also a thread ๐๐งต that breaks it down and explains everything:
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I started learning Python ๐ almost 10 years ago.
When I started out, I _only_ used free resources.
After all, I was just a kid and didn't even have money!
Those generous people taught me almost everything I know!
I want to give back, and that's why MY Python book is free.
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New in Python 3.10 ๐ is the `pairwise` function from `itertools`.
The `pairwise` function allows you to iterate over an iterable, while accessing consecutive pairs of items.
(Like a sliding window of size 2, if you know what that means.)
Here's an example ๐
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Have you ever seen anything like this in Python ๐ loops??
I just saw this being used for the first time, ever, and I decided to figure out what the heck this was...
And so here goes the explanation ๐๐งต
1/
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The Python ๐ย module `pathlib` is amazing.
Learning about it will make you 10x more productive*! ๐
If you want to work with files, you need to know about it!
Let me show 5 of the most useful tools in this module ๐
(*Actual numbers may vary. ๐คก)
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Someone just DM'd me, asking how to start learning Python ๐
Here's what I replied ๐
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Python ๐ย decorators are often considered an โadvancedโ topic.
But they don't need to be hard.
Let me explain ๐ย how decorators are an elegant and powerful tool. ๐
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I just came up with the perfect analogy to help you understand asyncio in Python ๐
You can thank me later ๐
Buckle up ๐
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Would you like me to teach you how to write Python ๐ code that is more elegant, more effective, and more expressive than what you have been writing until now... for free?
I am looking to teach Python to people who want to master Python to the best of their abilities.
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I remember it took me a couple of years to really _understand_ recursion.
When I first started learning computer programming, it just didn't click!
Now, recursion feels natural to me.
Here's how I think of it ๐
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Python ๐ย developers can use `property` to supercharge their classes. ๐
With `property`, you can write attributes that are computed dynamically.
Let me show you how it works in this thread. ๐
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Do you use VS Code in your Python ๐ programming?
I just discovered that you can CTRL + click on multiple locations to edit multiple locations at the same time!
@vscodetips
, how about that?
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Do you struggle with list comprehensions in Python ๐?
I know I did.
That's why I have lined up a series of tweets on the subject.
For the next 100 ๐ฑ days I will share a daily tip or exercise about list comprehensions.
So, what should you do..?
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Do you use Python ๐?
I often like to suggest people get acquainted with the function `itertools.product`.
Handy, for example, to flatten 2 or more nested `for` loops.
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Every Python ๐ย programmer should learn about `itertools`.
It's a great module with lots of elegant and efficient tools! ๐
You'll write better code with these ๐
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Here is an interesting way to get *both* the smallest and largest element of an iterable in Python ๐
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I have gotten multiple requests to explain recursion.
Recursion is a maths/computer science concept and it goes beyond Python ๐, or JavaScript, or whatever language you use.
Let me explain recursion with an example ๐
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๐๏ธ the weekend is coming ๐ฅณ
If you want, use it to rest! You deserve it!
Or, make this a memorable weekend:
Let this be the weekend you implement your first neural network ๐ง from scratch, in Python ๐
Here's the roadmap ๐ฃ๏ธ
๐๐งต
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Python ๐ functions take positional and keyword arguments.
You can tell Python to force arguments to be either positional-only or keyword-only.
Here is how ๐
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Here is some Python ๐ code using
- decorators
- callable classes
- custom operators
- โfunctionalโ function composition
- arbitrary args and kwargs
Here is a breakdown of everything that is going on ๐
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Have you ever had a hard time debugging ๐ a Python ๐ script?
If you say you haven't, you're lying! ๐
Let me show you something that you're gonna love me for!
Run your script with the `-i` flag!
By doing so, you get a REPL when the script finishes, EVEN with errors ๐ฃ
1/4
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๐๐ฆ Python under the hood.
๐๐งต Here's a thread on the dunder method `__init__`.
You can't say you **know** Python if you don't know this, so...
In this thread we will cover the dunder method `__init__` and its role in Python OOP.
Here we go ๐
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I've been doing Python ๐ย for +11 years. ๐
Here's a roadmap to learn 6 major topics you can't miss:
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Now you can run Python ๐ code in your HTML!
You just need to use the <py-script> tag, and that's it!
I wrote a short TIL describing how you can start using it.
The post itself uses PyScript to print a timestamp formatted with Python's `datetime`.
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Here is some Python ๐ code with a bunch of interesting things going on:
๐ decorators
๐ callable classes
๐ custom operators
๐ โfunctionalโ function composition
๐ arbitrary args and kwargs
Pick this code apart and study it!
I'll explain it in a thread later ๐
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How do you create a Python ๐ package?
How to publish it? How to set up CI/CD?
How do you check code coverage?
Most importantly, how do you add those cute badges to your README file?
I was writing a thread on this, now I turned it into an article ๐
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Yesterday,
@nedbat
tweeted a really weird piece of code and there was a lot to learn from there!
String formatting is used very often in Python.
Did you know you can implement formatting for your own objects as well?
Just implement the dunder method `__format__` ๐
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I have a challenge for you ๐ง
Here is a sequence of some numbers:
- 1
- 11
- 21
- 1211
- 111221
- 312211
Can you guess the next number?
Bonus Q: can you write a program that computes the next term of the sequence?
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There is more than one way to skin a cat.
In Python ๐, there is more than one way to create a dictionary.
However, I claim not all ways are equally good.
Here ๐ is a situation where I show 4 different ways of creating a dict, showing a progression in knowledge/techniques.
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Here's a cool Python ๐ tip ๐ก!
Use `...` in places where you haven't finished writing your code.
For example, inside a function or a class!
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The Python ๐ Standard Library is one of the reasons I love ๐ Python.
๐๐ dealing with your filesystem is super simple.
All you have to do is use the `pathlib` module.
This short thread is a mini `pathlib` cookbook ๐ณ, showing some example usages of `pathlib`.
Ready ๐?
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Have you heard that Python ๐ 3.10 will be released soon?
Are you ready for when it drops ๐ฃ๐ฅ?
Python 3.10 will ship with the new โจ match statement, and I created a cheatsheet just for that.
This is also a thread ๐๐งต that breaks it down and explains everything:
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Best tip to ace that Python ๐ interview question:
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What's the best computer programming book you've ever read, and why was it the best?
No need for consensual replies, I just want honest opinions.
It can be about a language, like Python or JavaScript, a tool or framework, or anything related to programming.
I'll start ๐
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This happens to me all the time:
I start charging ๐โก my laptop while using it, and then forget about it!
When I notice, the battery's been full ๐ for a long time!
Use this Python ๐ script to periodically check if charging is done, and to notify ๐ you when it is!
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Python ๐ indexing supports slicing with `[:]` and `[::]`...
But did you know you can create `slice` objects?
You can even name your slices! ๐
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@PrasoonPratham
That's a nice problem. Using `divmod` we can successively group the leftover days in the longer time frames:
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`for` loops are the bread and butter of Python ๐ programming, right?
And yet...
They are misunderstood by many because people lack an *intuitive understanding* of how `for` loops work.
Let me help ๐
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Everyone knows that giving proper names to variables and functions is the true programmer's bane.
Here's a thread ๐๐งต with do's and don'ts for naming things in Python ๐
We can only hold a small number of simultaneous ideas in our ๐ง , so proper naming can really help us!
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๐ค If you are learning Python ๐, I want to do an experiment:
Here's a thread ๐๐งต teaching you conditional expressions.
BUT, I will teach you with NO words ๐ถ
I will only show code snippets and examples.
Check the thread out carefully ๐ and then give me your feedback!
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There's an interesting โmistakeโ I see beginners do all the time when learning computer programming.
When using conditions, they compare directly to Booleans!
Often, there's no need to compare to Boolean values, just use the condition directly ๐
Here's a Python ๐ example:
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Error handling in Python ๐ย made simple. ๐
๐
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In the last 6 hours, more than 1200 people downloaded my free Python ๐ book.
It is an honour that YOU are trusting ME to help you master Python!
Also, huge shout-out to
@svpino
for helping me reach a massive audience!
Let's go ๐
A book that will teach you how to write elegant Python code.
โข 100% free
โข Over 10,000 readers
โข All 5-star reviews
The book is free today, but it may not last.
Get your copy right away!
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Do you know what's a good replacement for nested `for` loops in Python ๐ ?
`itertools.product` is!
With `product` you can combine all items of one sequence with all items of another sequence (and it works with 3 or more sequences as well!).
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Careful with mutability in Python ๐
I already knew this, and yet I made this mistake in my code!
When you multiply a list of lists in Python, you are not creating copies of the sublists.
The sublists are actually all the same.
That's why this happens ๐
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The Python ๐ย module datetime is your best friend if you want to work with dates and times. ๐
Here are some of the cool things it does:
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๐ก Here's a cool Python ๐ tip for you.
Run Python with the `-i` modifier to get an interpreter after the script is done.
This gives access to the variables ๐ that were defined by the time the script is done...
This even works if the program is interrupted with an exception!
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If you are learning Python ๐ you will eventually encounter list comprehensions.
List comprehensions are a convenient way of creating lists. ๐
There are three main benefits associated with using themโฆ
But below I just share an example list comprehension.
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Always be aware of mutability in your Python ๐ code.
It's not difficult to understand how it works...
But if you don't pay attention ๐, it may produce seemingly surprising results ๐๐ฒ
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Did you know that, in Python ๐, it only takes 2 lines of code to open your browser in your favourite website?
The module `webbrowser` comes in the standard library and its `open` method opens the URL you pass it.
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If you're ever in a Python ๐ interview and you are asked to implement the factorial function...
You know what to do!
Ask them if you _really_ have to reinvent the wheel ๐
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Did you know that Python ๐ comes with a simple `statistics` module?
One of the functions in there is the `median` function.
The `median` takes a series of numerical values and computes the number that lies in the middle of all of them. ๐
(The data doesn't need to be sorted.)
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Good morning to the folks who do Python ๐ debugging with `print`.
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What's the BEST way to learn Python ๐?
I've been writing Python for 10 years and taught 100s of people.
Here is a FAQ with actionable advice ๐๐งต
But everyone is different, so share your thoughts as well ๐๐ฌ to help as many as possible!
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Today I spent the day playing with sockets in Python ๐
Here is you can get two sockets to communicate with each other.
All you have to do is open two Python instances and type the code I show in the images.
The socket on the left reverses the messages it receives ๐คช
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The Python ๐ string methods `.lstrip` and `.removeprefix` look very similar.
But they do very different things!
Let me explain.
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Did you know that Python ๐ can actually use semicolons ( `;` ) to separate statements? ๐คฏ
Granted, those pesky things do not usually belong in your code...
But they can be quite handy in the REPL, to group statements together, to make it easier to re-execute them later.
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Look who made it to the front page of Hacker News ๐
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Python ๐ f-strings can align a value inside a slot with a fixed width.
And you can even what character fills the remaining space! ๐
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I like functional programming, do you?
I use some functional patterns in Python ๐ a lot, while others not so much.
For example, how do you usually compose two functions in Python?
Do you do it like in the top or in the bottom?
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I'm building a Python ๐ course for kids aged 15~18.
What are some modules/tools they can use that allow them to create things they can see, interact with, show others?
E.g., pygame, streamlit, and what more?
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Today, I'm spending the day learning in public about socket programming (in Python ๐).
My starting point is this:
โI think sockets are like tunnels/roads that allow different programs to talk to each other directly.โ
This ๐งต will evolve as I learn and experiment ๐
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Do you want to check if a Python ๐ variable matches one of several possible values?
Instead of writing a big chain of `or` and equalities `==`, use the `in` operator!
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Here is a complete diagram of a Python ๐ function definition. ๐
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How did you learn programming?
University ๐, books ๐, online resources ๐?
Paid, or free ๐ธ?
I learned online from free resources.
Now I want to give back to the Python ๐ community, and that's why I'm making my Python book free ๐
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How do you set up a Python ๐ package?
How do you set up CI/CD with testing and code coverage?
How do you publish a package to PyPI?
I don't know ๐คท
But today I'll be finding out and tweeting my findings in this thread.
Come join me ๐
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Are you a Python ๐ developer?
If you are, you can - and SHOULD - get rich, quick.
Just do
pip install rich
I took 9 years to get rich, but you can get rich TODAY!
It's such an awesome package which lets you style your outputs beautifully!
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Working with dates in Python ๐?
If you are, you probably know the module `datetime`.
If you need to know what time it is โnowโ, use the method `now`:
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Day 2/100 of learning and practising Python ๐ list comprehensions!
Let's go ๐
Here's an exercise for you ๐โ๏ธ
Run the two snippets of code.
What do their results look like?
What parts of the code are different in the snippets?
And what parts are the same?
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I love that Python ๐ comes with batteries included.
One of my favourite modules is `collections`, with which you can do a lot of cool stuff!
Using `collections.deque`, it's really easy to get the last N lines of a file!
Check it out ๐
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๐ก Here is a naming tip that you can use in Python ๐, JavaScript, or any other programming language you use.
๐ use verbs (actions) for function names
๐ use nouns for variables/data
๐ use adjectives for Boolean values
Remember that good naming conventions are important!
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Here is a diagram showing various types of function signatures in Python ๐
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Playing around with Python ๐?
Need to inspect an instance of a custom object..?
Use `vars`! It will show you the instance attributes and values.
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I just found another Python ๐ monstrosity.
This one was brought to you by the infamous
@dabeaz
...
But what does it do?
Sit tight, here we go ๐งโ๐
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@tdinh_me
One of my favourite sayings is that โluck happens when opportunity meets preparationโ.
Maybe you got โluckyโ, but that's only because you spent all those years preparing.
Others, presented with the same opportunity, wouldn't get lucky because they weren't prepared.
10
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Python ๐ย developers can use `property` to supercharge their classes. ๐
With `property`, you can write attributes that are computed dynamically.
Properties can also be updated dynamically.
Let me show you how in this thread. ๐
10
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227
Have you ever tried to optimise your Python ๐ code, but weren't able to tell which alternative implementation was faster?
Let me teach you how to use the `timeit.timeit` method to measure execution time of small code snippets.
A thread ๐๐งต
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Every Python ๐ย programmer uses the ICPO rule. ๐
Even if you don't know what it is.
Let me tell you what the ICPO rule is and what it does ๐
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It's amazing how frequently I get to use the collections.Counter in my Python ๐ programs...
Get acquainted with the tools in the module `collections`, you won't regret it!
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@__mharrison__
Hey Matt
I'm Rodrigo
I'm from Portugal
I like reading
fantasy books
technical books
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Day 99/100 of learning and practising Python ๐ list comprehensions!
This is the toughest exercise so far! I think..?
This code aggregates anagrams from a bag of words.
Let's go ๐
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Day 20/100 of learning and practising Python ๐ list comprehensions!
Let's go ๐
List comprehensions can include filters.
These filters let you only use the values that you want.
Here is a diagram comparing the loop + if + append to a list comprehension ๐
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๐ค Do you ever write some Python ๐, look at it, and get the feeling there MUST be a better โจ way to do that..?
I get that ALL the time! ๐
That's why I started researching and writing articles to help me (and you!) write better code.
Here's all 28 of them (so far!) ๐๐งต
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Python ๐ย f-strings are the best. ๐
Use an `=` inside your f-string to print the value AND the expression that produced the value! โจ
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I love the `enumerate` Python ๐ built-in!
I love it because your `for` loops become much more readable โจ if you know how to use it.
Here's a thread ๐๐งต on how `enumerate` will make your Python code so much better.
Let's go ๐
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Merging two dictionaries in Python ๐
In 3 ways:
๐ข using the splat operator `**`
๐ก using the pipe operator `|` (Python 3.9+)
๐ด updating a dict in-place with `|` (also Python 3.9+)
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