openstack/deb-python-eventlet
Code Issues Proposed changes

examples: webcrawler: urls tuple->list + more style fixes

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This commit is contained in:
Sergey Shepelev 2013-01-04 04:26:31 +04:00
parent 2470941639
commit 59cc495565
1 changed files with 10 additions and 9 deletions
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19
examples/webcrawler.py
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@ -1,29 +1,30 @@
#! /usr/bin/env python
#!/usr/bin/env python
"""
This is a simple web "crawler" that fetches a bunch of urls using a pool to
This is a simple web "crawler" that fetches a bunch of urls using a pool to
control the number of outbound connections. It has as many simultaneously open
connections as coroutines in the pool.
The prints in the body of the fetch function are there to demonstrate that the
requests are truly made in parallel.
"""
urls = (
"https://www.google.com/intl/en_ALL/images/logo.gif",
"http://python.org/images/python-logo.gif",
"http://us.i1.yimg.com/us.yimg.com/i/ww/beta/y3.gif"
)
import eventlet
from eventlet.green import urllib2
urls = [
"https://www.google.com/intl/en_ALL/images/logo.gif",
"http://python.org/images/python-logo.gif",
"http://us.i1.yimg.com/us.yimg.com/i/ww/beta/y3.gif",
]
def fetch(url):
print "opening", url
body = urllib2.urlopen(url).read()
print "done with", url
return url, body
pool = eventlet.GreenPool(200)
for url, body in pool.imap(fetch, urls):
print "got body from", url, "of length", len(body)