gistfile1.py

from __future__ import print_function
import gevent

# synchronous
def f1():
    for i in xrange(10):
        print('f1', i)


def f2():
    for i in xrange(10):
        print('f2', i)

# Spawns f1, then f2
jobs = [gevent.spawn(g) for g in [f1, f2]]
gevent.joinall(jobs)

print()
# expected to be asynch (expect each to block)
def f1():
    for i in xrange(10):
        gevent.spawn(print, 'f1', i)

def f2():
    for i in xrange(10):
        gevent.spawn(print, 'f2', i)

# Spawns f1, which spawns 10 f1prints
# Spawns f2, which spawns 10 f2prints
jobs = [gevent.spawn(g) for g in [f1, f2]]
# Only collects the 2 spawns in the list exp, not the 20 others
gevent.joinall(jobs)

print()
# yield asynchronously?
def f1():
    for i in xrange(10):
        jobs += [gevent.spawn(print, 'f1', i)]
    gevent.joinall(jobs)


def f2():
    jobs = []
    for i in xrange(10):
        jobs += [gevent.spawn(print, 'f2', i)]
    gevent.joinall(jobs)

jobs = [gevent.spawn(g) for g in [f1, f2]]
gevent.joinall(jobs)

print()
# just sleep to block
def f1():
    for i in xrange(10):
        print('f1', i)
        gevent.sleep(0.0001)

def f2():
    for i in xrange(10):
        print('f2', i)
        gevent.sleep(0.0001)

jobs = [gevent.spawn(g) for g in [f1, f2]]
gevent.joinall(jobs)