one.py

#!/usr/bin/python3

import webbrowser

# starting from http://www.pythonchallenge.com/pc/def/0.html
new_path = 2 ** 38
new_url = "http://www.pythonchallenge.com/pc/def/{}.html".format(new_path)
webbrowser.open(new_url)

# takes me to http://www.pythonchallenge.com/pc/def/map.html
# SEEMS LIKE IT WORKED

two.py

#!/usr/bin/python3

import string
import webbrowser

scrambled = """
 g fmnc wms bgblr rpylqjyrc gr zw fylb. rfyrq ufyr amknsrcpq ypc dmp. bmgle gr gl zw fylb gq glcddgagclr ylb rfyr'q ufw rfgq rcvr gq qm jmle. sqgle qrpgle.kyicrpylq() gq pcamkkclbcb. lmu ynnjw ml rfc spj. 
 """

 # k->m
 # o->q
 # e->g

 # mapping from N to N+2 in the alphabet.

start = string.ascii_lowercase
finish = string.ascii_lowercase[2:] + string.ascii_lowercase[:2]
table = str.maketrans(start, finish)

print(scrambled.translate(table))

#prints i hope you didnt translate it by hand. thats what computers are for. doing it in by hand is inefficient and that's why this text is so long. using string.maketrans() is recommended. now apply on the url. 

url = "map"
new_url = "http://www.pythonchallenge.com/pc/def/{}.html".format(url.translate(table))
webbrowser.open(new_url)

# wowowow http://www.pythonchallenge.com/pc/def/ocr.html