Building a Blockchain in 15 Minutes (Python) - Programmer explains

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Good Morning Crypto
Ivan on Tech by Ivan Liljeqvist

[@IvanOnTech]

Learn Blockchain Programming: academy.ivanontech.com To follow along, download PyCharm: www.jetbrains.com/pycharm/

[@IvanOnTech]

Haha! Pycharm

[@sqkazmiful]

@@IvanOnTech hello ivan I want to talk with you in PM ...is there a way to communicate with you please?

[@lemur531]

Have you heard about Lamden Tau? It’s a blockchain built on python. Come to our telegram. @lamdenchat. Would love to have you their. Also, our mainnet is coming out soon but you can see our code on GitHub

[@ryanswatson]

Is there a continuation of this specific video within your course?

[@tipsoffficial3664]

Hello bro....Why you cannot give us...code? We want just copy & paste please 🥺

[@JoseArteaga]

Great stuff Ivan! Love all of your educational content! I just shared it with my community. 💪💾💯

[@robertdillingham5165]

You got an impressive amount of information across in 15 minutes! Really enjoyed the way you boiled it down, you've got a new subscriber!

[@gkmkgmkgm629]

Beautifully explained... actually your first video on this topic with java published before 3yrs is still very much watchable...keep up your quality work Ivan.👍👍👍

[@ommpeter]

I watched this video 3 years ago and it was really informative. I’m watching it again today and I’m even more impressed by how much concise information is packed into a short video like this. Not to mention historical context. Thanks Ivan. Let’s gogogogogogogogogoooo

[@bluesdog88]

Thanks Ivan, my first blockchain video, very well demonstrated, now I'm hooked! Thanks!!

[@moforogue]

I learned how the blockchain work. Thanks for the explanation. :)

[@quinguyen791]

Thank u Ivan !! learning a lot from u GR from Holland !!

[@hoopscoop2726]

Amazing video. Thanks, Ivan!

[@cotufocotufito9765]

Congratulations Ivan! This is a very informative video.

[@nrr26000]

Fantastic Ivan. Good Luck.

[@vufberlick3697]

Respect man, this will sell. 👋👍👊🏻

[@TheSullenDude]

Incredibly clear and helpful. Thanks a bunch!

[@jgabt]

I got a full understanding of Blockchains from this video! 11/10 nice!!

[@alamanatv53]

Thank you ivan for this, I have interest in this technology but I found the programming very complicated

[@ghostbuster8377]

Tbh i have known you had courses and i never thought to apply. I am now considering it because of the quality of this vid tutorial

[@hamza7936]

how do you make it so that for every new block, it prints a message above the printed hash saying "Block 1" and for the second one "Block 2" etc... I don't want to manually type "print("Block...") every single time.

[@andersbraathen1256]

Great lesson! Was wondering how the blockchain detect if somebody try to change previous blocks? Who checks and what happens? Does only the blockchain know or how do people detect it?

[@IvanOnTech]

that's the networking level, everyone has a copy of the blockchain and everyone verifies hashes demonstrated in this video

[@tipstime1169]

@@IvanOnTech Could you enlight a bit more regarding this? Or could you make a video to show how to detect if some hash changes?

[@user-th8xz6hi6b]

This guy pronounces his words so precisely

[@Yovry]

Is there a follow up video where he shows us how to implement mining pools and such. I really think it would be cool to make a fully functional crypto currency mining software

[@hamzah6830]

good teacher! simple and complete

[@AssaShenOTP]

Does someone know what compiler is @Ivan on Tech using? ty

[@yujihayashi484]

Wow, this is so amazing for python programmers in order to understand how block-chain works.

[@samiadnan1408]

Why do I need to add the "previous_hash" along with " ".joint(transaction) 7:58 ? Please reply.

[@subijoyacharya3189]

Love and support from India. Powering the YT algo.

[@LarsWhalen]

yeah!

[@elioalcala4371]

YOU ARE A GOOD TEACHER- I LEARNED SOMETHING GOOD TODAY

[@B33LT]

I learned that I can learn blockchain in only 15 minutes...now I'll go make my own coin!! JK

[@Digitalworldfly]

can you help me?

[@barney3142]

It would be interesting to see how the mining and the whole p2p network works.

[@sajeevr2464]

you have earned a subscription!!!

[@manthanmehta2999]

I have errors in block part Saying that you have to define previous hash and such and not accepting user defined variables Please help!!!

[@prosuggest]

Which language should we learn to work in blockchain in future? OR What are the set of languages we should know?

[@kalengsarden3493]

web3js or web3py and solidity

[@FreeAdvice4All]

I learned that I'd like to become a programmer but can't afford the academy...

[@tommyluck19]

Contact me,Brother, please!

[@0p3rasor14]

i see: No module named 'block'. how to fix that?

[@Alexandretamara1]

Can I build a virtual product instead of a coin on blockchain?

[@MrKurdishFreak]

why didnt you use the blockchain array?

[@joesmith-ju7hh]

In 2013 I gave a dominatrix from Glasgow about 20 Bitcoin.

[@thethirdeye5850]

Excellent

[@angelcarrillo6525]

It’s very basic but this is an excellent video to get started on blockchain

[@tommyluck19]

Thanks, Ivan! I have no programming experience it's Too Chinese for me🤯 but I have a question: theoretically if 1 day every single person on Earth would buy up some amount of bitcoin. The miners would keep it up with capacity to processing the transactions? And all of those transactions would fit in one block if it would happen in 10 minutes? Thanks, hopefully you understand what i like to know

[@saudi589]

now we will see more 5034858023457843 altcoins

[@natsunwtk]

are there any newer? I came from a 6 years ago vdo said this is the newer than that lol but it's still 4 years ago

[@adeeb12321]

how to check for balance?

[@ivogarofalo]

I love it!,,

[@Dutchy.fx99]

Lets Go

[@jrep]

Finally some Python action! And in PyCharm, my new favorite IDE. I hope to see much more Python use n the academy :) Also, there are so many Py to JS compilers/translators out there, why not scrap JS all together and just be with the cool kids and only use Python? Ok i've never used one, maybe it wont work well for this type of code?

[@RandomAF0001]

Jonas Pettersson check out Lamden. From scratch Python blockchain.

[@raiskhadija5109]

why you didn't use the nonce ?

[@wojciechorama]

Mother asked me how does bitcoin work. I sent her this video.

[@robb1324]

"Satoshi sent 5 BTC to Hal Finney", aka Satoshi sent 5 BTC to himself ;)

[@donktdonkt4288]

secret massage xD 🤣🤣🤣🤣🤣🤣

[@onearyf1641]

With happy ending

[@soobax7544]

I am interest to blockchain, not to mine bitcoin or build next cryptocurrency but rather to solve a very wider problem that the world facing, like finance management, logistics and transportation in developing countries etc. could anyone tell where I can find best resources, or schools that offer this subjects

[@princekumar-yb4oq]

Which IDE are you using?

[@IvanOnTech]

Pycharm

[@nicolassalascorrea]

improve and better good job

[@empirix]

Icx/icon dapp video please

[@TrendGamingChannel]

I cant believe coding is so easy and exciting

[@TheDestint]

One suggestion. If you're making a tutorial with code, it's best not done with a dark theme. It can become more difficult to see

[@NilsFS7]

9:41 looks like a premine 🤔

[@Authoravarndal]

Can someone confirm this still works? I can't make the "Class Block:" work. :/

[@rohanw411]

What error is it giving

[@rohanw411]

Python isn't like a game exploit, its a coding language that hasn't really changed for some time, what version are you using?

[@mehuldevrani3594]

"to be more respectful to python" ***Proceeds with OOPS XD

[@a9s182]

5:15 habitual Java

[@nickkbisht1015]

So now you switched from Java to Python !

[@darryljones8369]

Hello, Mine did not compile and I am stuck already lool

[@kevingates4373]

Good

[@AxL28AxL]

Can you publish your own Cryptocurrency?

[@tanmaybhatt6980]

Secret Message -> Secret Massage -> Ass Massage. haha.! Could it be that Bitcoin Came into existence to clarify this misunderstanding.!!!?

[@KonstantinKnapp21071997]

nice

[@loupax]

Today I learned I accidentally invented blockchain

[@ribashra]

We are iota, we are the future

[@Eplemos4Life]

Liz ...I see what you did there Ivan 👀😏

[@kathybreneman7892]

The only way we will ever have a fair election is to verify votes on a block chain. It should be very simple to have a program that matches voters with tax rolls. - Count only voters that are tax payers. No foreign votes. - Voter must be living - Only one vote each - no duplicates - No mail in votes. Everyone votes on secure servers, either from home or public places like libraries if they don't have access to a computer. This will eliminate any intimidation at the polls - Block chain verifies that the votes are not changed. Multiple servers verify everything. I think we were totally unprepared for the amount of voter fraud and blatant disregard for our rights in this election. I don't care who was running. The winner was a foregone conclusion. The (Chinese?) computers made sure of it. Computer programs can be used for good as well as evil!

[@targetroot211]

11:31 or 'Hey! This guy just sent me 22 mln BTC! '

[@daz7335]

Or you can do it on Neblio in 30 seconds, no coding knowledge required

[@moibe182]

Yeah secret massage!

[@Fun-io9kv]

If you wanna be respectful to python try not to use classes as much as possible. Python works best as functional or procedural 😅 5:29

[@JediMasterT]

Python is so weird lol, it's like coding in a yaml file

[@barncasino689]

1st on Ivan

[@axisbabi]

^.^ Btc above 20K sooon :-D ^.^

[@bazilian0]

Ivan is Satoshi.

[@drumpf4all]

Sad you use Windows to code.

[@IvanOnTech]

you are focusing on the wrong thing

[@jamalford961]

this the dude that hacked the election smh. I'm jk lol thank you man. nice job.

[@coffeeandvapes1308]

Im nowhere near this point yet but its very interesting that I got the concept. I think organisation and clear object/function/class naming convention will help to cause less headaches. Thanks Ivan 👍🇬🇧.