Python - No puedo extraer codigo fuente de un url en Python

import urllib.request

import re

url = "http://finance.yahoo.com/q?s=aapl&ql=1"

htmltext = urllib.request.urlopen(url)

htmltext = htmltext.read()

htmltext = htmltext.decode("utf")

print(htmltext) --> aqui sale la mitad del codigo fuente

regex = '<span id=\"yfs_184_aapl\">(.+?)<\span>'

pattern = re.compile(regex)

price = re.findall(pattern, htmltext)

print(price) --> [ ]

import re

a="""hola <span id="yfs_184_aapl">127</span> que tal"""

pattern=re.compile('<span id="yfs_184_aapl">(.*)</span>')

pattern.findall(a)

import urllib3

url = "http://finance.yahoo.com/q?s=aapl&ql=1"

http = urllib3.PoolManager(timeout=5.0)

r = http.urlopen('GET', url)

htmltext=r.read()