Learn Blockchains by Building One
Daniel van Flymen

Definitely a useful article. Thanks dude. but when I was trying to follow up what you did here, I face an error:

File “blockchain.py”, line 10, in <module>
 from flask import Flask, jsonify, request
ModuleNotFoundError: No module named ‘flask’

I haven’t got any experience with flask, and I couldn’t find any solutions. I’d be thankful if you help me find the solution.