Sending the variable's content to my mailbox in Python?

I have asked this question here about a Python command that fetches a URL of a web page and stores it in a variable. The first thing that I wanted to know then was whether or not the variable in this code contains the HTML code of a web-page:

from google.appengine.api import urlfetch
url = "http://www.google.com/"
result = urlfetch.fetch(url)
if result.status_code == 200:
doSomethingWithResult(result.content)

The answer that I received was "yes", i.e. the variable "result" in the code did contain the HTML code of a web page, and the programmer who was answering said that I needed to "check the Content-Type header and verify that it's either text/html or application/xhtml+xml". I've looked through several Python tutorials, but couldn't find anything about headers. So my question is where is this Content-Type header开发者_开发百科 located and how can I check it? Could I send the content of that variable directly to my mailbox?

Here is where I got this code. It's on Google App Engines.

If you look at the Google App Engine documentation for the response object, the result of urlfetch.fetch() contains the member headers which contains the HTTP response headers, as a mapping of names to values. So, all you probably need to do is:

if result['Content-Type'] in ('text/html', 'application/xhtml+xml'):
    # assuming you want to do something with the content
    doSomethingWithXHTML(result.content)
else:
    # use content for something else
    doTheOtherThing(result.content)

As far as emailing the variable's contents, I suggest the Python email module.

for info on sending Content-Type header, see here:
http://code.google.com/appengine/docs/python/urlfetch/overview.html#Request_Headers