I'm learning Gevent, but can't get the value returned by the function called in a greenlet. The following code:
import gevent.monkey
gevent.monkey.patch_socket()
import gevent
from gevent import Greenlet
import urllib2
import simplejson as json
def fetch(pid):
response = urllib2.urlopen('http://time.jsontest.com')
result = response.read()
json_result = json.loads(result)
datetime = json_result['time']
print('Process %s: %s' % (pid, datetime))
return json_result['time']
def synchronous():
for i in range(1,10):
fetch(i)
def asynchronous():
threads = [Greenlet.spawn(fetch, i) for i in range(10)]
result = gevent.joinall(threads)
print [Greenlet.value(thread) for thread in threads]
print('Synchronous:')
synchronous()
print('Asynchronous:')
asynchronous()
gives me the error:
print [Greenlet.value(thread) for thread in threads]
AttributeError: type object 'Greenlet' has no attribute 'value'
What am I doing wrong, and how do I get the value from each greenlet?
According to http://www.gevent.org/intro.html you want
def asynchronous():
threads = [Greenlet.spawn(fetch, i) for i in range(10)]
gevent.joinall(threads)
print([thread.value for thread in threads])