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Watching all layers of Python code

We're going to dive into how languages interact as a stack. First, we'll download the a copy of Python and compile with GNU debugging tags enabled. I hope you're ready to watch registers in the processor flutter and C code scroll. We start by opening our favorite terminal.

Compile a debugging build of Python

Go to the directory the debugging build will be installed in

cd /opt/

	#!/usr/bin/python

	def main():
	'''
	This is the Python equivalent to the following C code:
	int n;
	printf("Enter a Number");
	scanf("&d",n);
	if(n==1)
	printf("true");

	<!DOCTYPE html>
	<html>
	<body>
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<link href="https://fonts.googleapis.com/css?family=Lato" rel="stylesheet">
	<style>
	h1,h2,h3,h4,h5,h6,p,label,input {font-family: 'Lato', sans-serif;}
	body {padding: 2rem;}
	</style>

	# function: file_perms_eq
	# description: checks first option (filename) to see if the file perms equals the second option (permissions)
	# usage example:
	# $ if file_perms_eq mail 700
	# > then echo 'good'
	# > fi

	file_perms_eq() { (( $(stat -c "%a" $1) == $2 ));}

	const { map, filter, reduce } = require('lodash');


	// array from 0 to 9
	const data = [0,1,2,3,4,5,6,7,8,9];

	// helper functions
	const doubled = val => val * 2;
	const isEven = val => val % 2;
	const isOverTen = val => val >= 10;

	#!/bin/sh

	FORMAT="{
	\"name\": \"%n\",
	\"access\": \"%A\",
	\"size\": \"%s\"
	},
	"
	printf "$(stat --printf="${FORMAT}" $*)"
	printf "\b"

	'''
	dive
	open a gdb session targeting a python compiled with gdb debugging enabled

	alias dive='gdb -iex '\''add-auto-load-safe-path .'\'' /opt/cpython/python'

	in gdb:
	b 1
	r
	s

	upstream php {
	server unix:/var/run/php/php7.2-fpm.sock;
	server 127.0.0.1:9000;
	}

	server {
	listen 80 default_server;
	server_name _;

	return 301 https://$host$request_uri;

	<html>
	<head>
	<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/brython/3.7.3/brython.min.js"> </script>
	<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/brython/3.7.3/brython_stdlib.js"></script>
	</head>
	<body onload="brython()">
	<script type="text/python">
	from browser import document, alert

	def echo(event):