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How to create an HTTPS certificate for localhost domains

This focuses on generating the certificates for loading local virtual hosts hosted on your computer, for development only.

Do not use self-signed certificates in production ! For online certificates, use Let's Encrypt instead (tutorial).

	# No se permiten comillas dobles en la inserción a base de datos
	import sys, psycopg2, psycopg2.extras, argparse, getpass
	import os
	import django
	os.environ["DJANGO_SETTINGS_MODULE"] = 'dj_books.settings'
	django.setup()
	from books.models import *
	from django.contrib.auth.models import User

	class Mem:

	def print_and_return(value):
	print(value)
	return(value)

	print("True and False")
	res= print_and_return(True) and print_and_return(False)

	print("False and True")
	res= print_and_return(False) and print_and_return(True)

	print ("Mariano Muñoz © €".encode('unicode-escape'))
	b'Mariano Mu\\xf1oz \\xa9 \\u20ac'


	Curiosidades:
	- En algunas imagenes al cargarlas me sal´ia Libpng warning: iCCP: known incorrect sRGB profile.
	para evitarlo use imagemagic con el comando : convert document.png -strip document.png y se solucion´o el problema