Rodrigo Girão Serrão 🐍🚀
@mathspp.com
I'll help you take your Python skills to the next level!
Python deep dive every Monday 🐍🚀 -> https://mathspp.com/insider
Short daily drop of Python knowledge 🐍💧 -> https://mathspp.com/drops
Python deep dive every Monday 🐍🚀 -> https://mathspp.com/insider
Short daily drop of Python knowledge 🐍💧 -> https://mathspp.com/drops
With the new year comes a new cycle of conferences!
What do you want to know about attending/organising/speaking at Python conferences?
Drop your Qs below and I’ll address them the best I can 👇
What do you want to know about attending/organising/speaking at Python conferences?
Drop your Qs below and I’ll address them the best I can 👇
January 8, 2026 at 10:48 AM
With the new year comes a new cycle of conferences!
What do you want to know about attending/organising/speaking at Python conferences?
Drop your Qs below and I’ll address them the best I can 👇
What do you want to know about attending/organising/speaking at Python conferences?
Drop your Qs below and I’ll address them the best I can 👇
If you're in Lisbon, join us for the Python Lisbon Meetup.
It's this Thursday, 8th of January, at 7pm at Instituto Superior Técnico.
Find us on www.meetup.com/python-lisb... or on Discord discord.gg/DCNEYDKw9s for the full details!
We'll have 1 talk + ?? lightning talks + chat
It's this Thursday, 8th of January, at 7pm at Instituto Superior Técnico.
Find us on www.meetup.com/python-lisb... or on Discord discord.gg/DCNEYDKw9s for the full details!
We'll have 1 talk + ?? lightning talks + chat
Join the Python 🐍 Lisbon Meetup Discord Server!
Discord server for the Python Lisbon Meetup community. | 61 members
discord.com
January 5, 2026 at 2:03 PM
If you're in Lisbon, join us for the Python Lisbon Meetup.
It's this Thursday, 8th of January, at 7pm at Instituto Superior Técnico.
Find us on www.meetup.com/python-lisb... or on Discord discord.gg/DCNEYDKw9s for the full details!
We'll have 1 talk + ?? lightning talks + chat
It's this Thursday, 8th of January, at 7pm at Instituto Superior Técnico.
Find us on www.meetup.com/python-lisb... or on Discord discord.gg/DCNEYDKw9s for the full details!
We'll have 1 talk + ?? lightning talks + chat
This is going to be a fun one, I can promise you that!
Organise the @python.berlin meeting on 12 February with a talk by Rodrigo Girão Serrão (@mathspp.com) on the paradox of itertools.tee: www.meetup.com/python-users...
#Python #Berlin
#Python #Berlin
Python User Group (PUB): The paradox of itertools.tee, Thu, Feb 12, 2026, 7:00 PM | Meetup
📆 Agenda
* 19:00 Welcome to the PUB (Python Users Berlin) – setting up
* 19:15 Main talk
* 20:00 Lightning talks
* 20:30 Social gathering
🎙 Main talk by Rodrigo Girão S
www.meetup.com
January 4, 2026 at 9:33 PM
This is going to be a fun one, I can promise you that!
I had an AMAZING idea for what would easily be my best blog article, ever.
But I might be a bit out of touch 😅
Help me figure this out:
Have you ever heard of the “P vs NP” problem?
Ok, and if you have, what about “NP-completeness”?
Have you heard of this term? Could you explain it back to me?
But I might be a bit out of touch 😅
Help me figure this out:
Have you ever heard of the “P vs NP” problem?
Ok, and if you have, what about “NP-completeness”?
Have you heard of this term? Could you explain it back to me?
December 20, 2025 at 12:54 PM
I had an AMAZING idea for what would easily be my best blog article, ever.
But I might be a bit out of touch 😅
Help me figure this out:
Have you ever heard of the “P vs NP” problem?
Ok, and if you have, what about “NP-completeness”?
Have you heard of this term? Could you explain it back to me?
But I might be a bit out of touch 😅
Help me figure this out:
Have you ever heard of the “P vs NP” problem?
Ok, and if you have, what about “NP-completeness”?
Have you heard of this term? Could you explain it back to me?
Do you folks know any meetups that would be happy to host a remote talk?
I have a couple of new talk ideas that I'd love to get some feedback on!
I have a couple of new talk ideas that I'd love to get some feedback on!
December 19, 2025 at 7:02 PM
Do you folks know any meetups that would be happy to host a remote talk?
I have a couple of new talk ideas that I'd love to get some feedback on!
I have a couple of new talk ideas that I'd love to get some feedback on!
Reposted by Rodrigo Girão Serrão 🐍🚀
If you only remember to do one thing today, it should be proposing a talk for #PyConUS 2026. CFP closes today!
us.pycon.org/2026/speakin...
us.pycon.org/2026/speakin...
Proposal Guidelines
PyCon US 2026
us.pycon.org
December 19, 2025 at 5:44 PM
If you only remember to do one thing today, it should be proposing a talk for #PyConUS 2026. CFP closes today!
us.pycon.org/2026/speakin...
us.pycon.org/2026/speakin...
What if... I started streaming regularly (weekly?) on a quest to CONQUER Leetcode?
Start from #0001, and solve all Leetcode problems?
Is that something watchable or am I just being ridiculous?
Start from #0001, and solve all Leetcode problems?
Is that something watchable or am I just being ridiculous?
December 15, 2025 at 3:02 PM
What if... I started streaming regularly (weekly?) on a quest to CONQUER Leetcode?
Start from #0001, and solve all Leetcode problems?
Is that something watchable or am I just being ridiculous?
Start from #0001, and solve all Leetcode problems?
Is that something watchable or am I just being ridiculous?
Advent of Code is over (only 12 days this year) and I'm kind of sad I don't have a reason to stream today.
I liked streaming!
What if I wanted to stream more?
What should I stream about?
I liked streaming!
What if I wanted to stream more?
What should I stream about?
December 13, 2025 at 4:03 PM
Advent of Code is over (only 12 days this year) and I'm kind of sad I don't have a reason to stream today.
I liked streaming!
What if I wanted to stream more?
What should I stream about?
I liked streaming!
What if I wanted to stream more?
What should I stream about?
Reposted by Rodrigo Girão Serrão 🐍🚀
Congratulations to the new #Python #SteeringCouncil!
🗳️ @pumpichank.bsky.social
🗳️ @corona10.bsky.social
🗳️ @pablogsal.com
🗳️ @savannah.dev
🗳️ @yhg1s.bsky.social
discuss.python.org/t/steering-c...
Welcome Savannah & thank you to @gpshead.bsky.social for your service!
hugovk.github.io/python-steer...
🗳️ @pumpichank.bsky.social
🗳️ @corona10.bsky.social
🗳️ @pablogsal.com
🗳️ @savannah.dev
🗳️ @yhg1s.bsky.social
discuss.python.org/t/steering-c...
Welcome Savannah & thank you to @gpshead.bsky.social for your service!
hugovk.github.io/python-steer...
December 13, 2025 at 2:13 PM
Congratulations to the new #Python #SteeringCouncil!
🗳️ @pumpichank.bsky.social
🗳️ @corona10.bsky.social
🗳️ @pablogsal.com
🗳️ @savannah.dev
🗳️ @yhg1s.bsky.social
discuss.python.org/t/steering-c...
Welcome Savannah & thank you to @gpshead.bsky.social for your service!
hugovk.github.io/python-steer...
🗳️ @pumpichank.bsky.social
🗳️ @corona10.bsky.social
🗳️ @pablogsal.com
🗳️ @savannah.dev
🗳️ @yhg1s.bsky.social
discuss.python.org/t/steering-c...
Welcome Savannah & thank you to @gpshead.bsky.social for your service!
hugovk.github.io/python-steer...
It's so ANNOYING to break out of nested loops.
Auxiliary variables, conditional statements, non-linear paths through your code...
It's a mess!
But if you extract the looping logic to a generator, you get:
- less indentation ✨
- a flat loop you can easily break out of ✨
Auxiliary variables, conditional statements, non-linear paths through your code...
It's a mess!
But if you extract the looping logic to a generator, you get:
- less indentation ✨
- a flat loop you can easily break out of ✨
December 11, 2025 at 1:51 PM
It's so ANNOYING to break out of nested loops.
Auxiliary variables, conditional statements, non-linear paths through your code...
It's a mess!
But if you extract the looping logic to a generator, you get:
- less indentation ✨
- a flat loop you can easily break out of ✨
Auxiliary variables, conditional statements, non-linear paths through your code...
It's a mess!
But if you extract the looping logic to a generator, you get:
- less indentation ✨
- a flat loop you can easily break out of ✨
📢 Public service announcement:
Don't buy from me:
Don't buy my books.
Don't sign-up for my courses.
Don't attend my cohorts.
Apparently, I'm a scammer. 🤷
At least, that's my interpretation of this comment from a subscriber...
Should I delete them from my mailing list?
Don't buy from me:
Don't buy my books.
Don't sign-up for my courses.
Don't attend my cohorts.
Apparently, I'm a scammer. 🤷
At least, that's my interpretation of this comment from a subscriber...
Should I delete them from my mailing list?
December 10, 2025 at 1:33 PM
📢 Public service announcement:
Don't buy from me:
Don't buy my books.
Don't sign-up for my courses.
Don't attend my cohorts.
Apparently, I'm a scammer. 🤷
At least, that's my interpretation of this comment from a subscriber...
Should I delete them from my mailing list?
Don't buy from me:
Don't buy my books.
Don't sign-up for my courses.
Don't attend my cohorts.
Apparently, I'm a scammer. 🤷
At least, that's my interpretation of this comment from a subscriber...
Should I delete them from my mailing list?
After yesterday's flop, today I'm live streaming to solve day 10 of Advent of Code and hopefully go back to day 9 part 2 to make progress on finishing it!
December 10, 2025 at 1:23 PM
After yesterday's flop, today I'm live streaming to solve day 10 of Advent of Code and hopefully go back to day 9 part 2 to make progress on finishing it!
A visualisation of day 7 from Advent of Code.
Worked on this during yesterday's stream, although the colouring was added off stream.
Worked on this during yesterday's stream, although the colouring was added off stream.
December 8, 2025 at 4:22 PM
A visualisation of day 7 from Advent of Code.
Worked on this during yesterday's stream, although the colouring was added off stream.
Worked on this during yesterday's stream, although the colouring was added off stream.
7 days of Advent of Code diagrams from my streams and analysis sessions!
December 7, 2025 at 7:06 PM
7 days of Advent of Code diagrams from my streams and analysis sessions!
Today was a fun Advent of Code problem!
Join me at 5pm UTC (in ~2h40min) as I livestream my solution and a visualisation for today's part 2.
We'll be implementing a very efficient Python solution with sets and counters!
Here's the link for later:
youtube.com/@mathsppblog...
Join me at 5pm UTC (in ~2h40min) as I livestream my solution and a visualisation for today's part 2.
We'll be implementing a very efficient Python solution with sets and counters!
Here's the link for later:
youtube.com/@mathsppblog...
Solving Advent of Code, day 7, in Python – Algorithm Mastery Bootcamp
In this live stream I'll be solving Advent of Code day 7 in Python.
Problem link: https://adventofcode.com/2025/day/7.
Hey, I'm Rodrigo from sunny Portugal 🇵🇹, and my job is to make you a better Pyth...
youtube.com
December 7, 2025 at 2:19 PM
Today was a fun Advent of Code problem!
Join me at 5pm UTC (in ~2h40min) as I livestream my solution and a visualisation for today's part 2.
We'll be implementing a very efficient Python solution with sets and counters!
Here's the link for later:
youtube.com/@mathsppblog...
Join me at 5pm UTC (in ~2h40min) as I livestream my solution and a visualisation for today's part 2.
We'll be implementing a very efficient Python solution with sets and counters!
Here's the link for later:
youtube.com/@mathsppblog...
Advent of Code doesn't rest during the weekend and neither do I!*
In ~3 hours (@ 5pm UTC) I will be livestreaming my Python solution for day 6.
We'll also go back to day 5 to implement the MOST efficient ⚡️ solution for day 5, since my solution from yesterday was kinda inefficient. 🐌
In ~3 hours (@ 5pm UTC) I will be livestreaming my Python solution for day 6.
We'll also go back to day 5 to implement the MOST efficient ⚡️ solution for day 5, since my solution from yesterday was kinda inefficient. 🐌
Solving Advent of Code, day 6, in Python – Algorithm Mastery Bootcamp
In this live stream I'll be solving Advent of Code day 6 in Python.
Problem link: https://adventofcode.com/2025/day/6.
Hey, I'm Rodrigo from sunny Portugal 🇵🇹, and my job is to make you a better Pyth...
youtube.com
December 6, 2025 at 1:53 PM
Advent of Code doesn't rest during the weekend and neither do I!*
In ~3 hours (@ 5pm UTC) I will be livestreaming my Python solution for day 6.
We'll also go back to day 5 to implement the MOST efficient ⚡️ solution for day 5, since my solution from yesterday was kinda inefficient. 🐌
In ~3 hours (@ 5pm UTC) I will be livestreaming my Python solution for day 6.
We'll also go back to day 5 to implement the MOST efficient ⚡️ solution for day 5, since my solution from yesterday was kinda inefficient. 🐌
I need ideas.
Later today (in ~2 hours) I'm going to be livestreaming while I solve Advent of Code day 5.
I want to livestream for ~1h.
But the problem won't be long enough.
What should I do after, along a similar theme?
Later today (in ~2 hours) I'm going to be livestreaming while I solve Advent of Code day 5.
I want to livestream for ~1h.
But the problem won't be long enough.
What should I do after, along a similar theme?
December 5, 2025 at 2:58 PM
I need ideas.
Later today (in ~2 hours) I'm going to be livestreaming while I solve Advent of Code day 5.
I want to livestream for ~1h.
But the problem won't be long enough.
What should I do after, along a similar theme?
Later today (in ~2 hours) I'm going to be livestreaming while I solve Advent of Code day 5.
I want to livestream for ~1h.
But the problem won't be long enough.
What should I do after, along a similar theme?
🔴 I'm going live in 30 minutes to solve Advent of Code day 4.
I'm sure we'll have some time left, so we'll also work on a visualisation for day 4.
Here's the link: youtube.com/@mathsppblog...
See you in 30!
I'm sure we'll have some time left, so we'll also work on a visualisation for day 4.
Here's the link: youtube.com/@mathsppblog...
See you in 30!
Solving Advent of Code, day 4, in Python – Algorithm Mastery Bootcamp
In this live stream I'll be solving Advent of Code day 4 in Python.
Problem link: https://adventofcode.com/2025/day/4.
Hey, I'm Rodrigo from sunny Portugal 🇵🇹, and my job is to make you a better Pyth...
youtube.com
December 4, 2025 at 4:29 PM
🔴 I'm going live in 30 minutes to solve Advent of Code day 4.
I'm sure we'll have some time left, so we'll also work on a visualisation for day 4.
Here's the link: youtube.com/@mathsppblog...
See you in 30!
I'm sure we'll have some time left, so we'll also work on a visualisation for day 4.
Here's the link: youtube.com/@mathsppblog...
See you in 30!
Anatomy of a list comprehension.
Understand this and you'll never need to look up list comprehensions again.
Understand this and you'll never need to look up list comprehensions again.
![Diagram showing the anatomy of a list comprehension: 1. data transformation; 2. data source; 3. optional data filter.
Code for general list comprehension:
my_list = [
data_transformation(value)
for value in data_source
if predicate(value)
]
A concrete example:
my_list = [
n ** 2
for n in range(1000)
if (n % 3 == 0) or (n % 5 == 0)
]](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:4642ovs4svxe3k3echdm4rks/bafkreiheujmfb23d7einycmxeyoq3dbshug4kwbyyemxk4obb365nj2vhm@jpeg)
December 4, 2025 at 12:14 PM
Anatomy of a list comprehension.
Understand this and you'll never need to look up list comprehensions again.
Understand this and you'll never need to look up list comprehensions again.
I'm going live to solve Advent of Code, day 2, in 10 minutes!
And we'll also be going back to the visualisation for yesterday's problem...
The link is in my profile :)
And we'll also be going back to the visualisation for yesterday's problem...
The link is in my profile :)
December 2, 2025 at 4:51 PM
I'm going live to solve Advent of Code, day 2, in 10 minutes!
And we'll also be going back to the visualisation for yesterday's problem...
The link is in my profile :)
And we'll also be going back to the visualisation for yesterday's problem...
The link is in my profile :)
Here's a lie developers tell themselves:
“Recursion is useless”
That's a coping mechanism because you're afraid of recursion...
But you shouldn't be afraid!
Recursion is actually nice ✨
And it's a very natural way to express certain algorithms...
Let me show you an example.
“Recursion is useless”
That's a coping mechanism because you're afraid of recursion...
But you shouldn't be afraid!
Recursion is actually nice ✨
And it's a very natural way to express certain algorithms...
Let me show you an example.
![Diagram showing how to use recursion when computing permutations.
Code:
def perm_(values):
if not values:
yield ()
return
for idx, value in enumerate(values):
rest = values[:idx] + values[idx + 1:]
for sub_perm in perm_(rest):
yield (value,) + sub_perm](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:4642ovs4svxe3k3echdm4rks/bafkreicnqlm463hfsv2y5mnkzzs2bte67xjdnxtxusjbmfaocwc2hqz2ee@jpeg)
December 2, 2025 at 4:12 PM
Here's a lie developers tell themselves:
“Recursion is useless”
That's a coping mechanism because you're afraid of recursion...
But you shouldn't be afraid!
Recursion is actually nice ✨
And it's a very natural way to express certain algorithms...
Let me show you an example.
“Recursion is useless”
That's a coping mechanism because you're afraid of recursion...
But you shouldn't be afraid!
Recursion is actually nice ✨
And it's a very natural way to express certain algorithms...
Let me show you an example.
This random tourist really took me by surprise:
So I arrived at the train station, saw a tourist couple trying to buy tickets, and offered to help.
They sorted the tickets out by themselves but wanted to double-check the platform they should be in.
I tell them the right one…
So I arrived at the train station, saw a tourist couple trying to buy tickets, and offered to help.
They sorted the tickets out by themselves but wanted to double-check the platform they should be in.
I tell them the right one…
December 2, 2025 at 11:40 AM
This random tourist really took me by surprise:
So I arrived at the train station, saw a tourist couple trying to buy tickets, and offered to help.
They sorted the tickets out by themselves but wanted to double-check the platform they should be in.
I tell them the right one…
So I arrived at the train station, saw a tourist couple trying to buy tickets, and offered to help.
They sorted the tickets out by themselves but wanted to double-check the platform they should be in.
I tell them the right one…
Oh by the way, you can still get ALL my 8 Python books PLUS all future updates PLUS all future books for $37.5 because of the Black Friday craze.
That's $166 worth of books for a pretty penny.
Here's the link: 📚 mathspp.gumroad.com/l/all-books-...
Enjoy the books :)
That's $166 worth of books for a pretty penny.
Here's the link: 📚 mathspp.gumroad.com/l/all-books-...
Enjoy the books :)
“All books” bundle 🚀
This bundle gives you access to $153 worth of ebooks at more than 50% off:Pydon'ts ($29)The little book of itertools ($19)The little book of pandas & matplotlib ($19)The little book of pygame ($19...
mathspp.gumroad.com
December 1, 2025 at 8:04 PM
Oh by the way, you can still get ALL my 8 Python books PLUS all future updates PLUS all future books for $37.5 because of the Black Friday craze.
That's $166 worth of books for a pretty penny.
Here's the link: 📚 mathspp.gumroad.com/l/all-books-...
Enjoy the books :)
That's $166 worth of books for a pretty penny.
Here's the link: 📚 mathspp.gumroad.com/l/all-books-...
Enjoy the books :)
I may or may not have been muted for the first 2 minutes of the stream 🤣
My first Advent of Code live stream will start in ~1h!
See you there?
Advent of Code 🧑💻 live-stream: www.youtube.com/@mathsppblog...
See you there?
Advent of Code 🧑💻 live-stream: www.youtube.com/@mathsppblog...
December 1, 2025 at 7:28 PM
I may or may not have been muted for the first 2 minutes of the stream 🤣
My first Advent of Code live stream will start in ~1h!
See you there?
Advent of Code 🧑💻 live-stream: www.youtube.com/@mathsppblog...
See you there?
Advent of Code 🧑💻 live-stream: www.youtube.com/@mathsppblog...
December 1, 2025 at 3:58 PM
My first Advent of Code live stream will start in ~1h!
See you there?
Advent of Code 🧑💻 live-stream: www.youtube.com/@mathsppblog...
See you there?
Advent of Code 🧑💻 live-stream: www.youtube.com/@mathsppblog...