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"""Example: Make rate limited API calls in worker threads"""
import ratelimitqueue
import multiprocessing.dummy
import time
import random
def make_call_to_slow_api(url):
time.sleep(random.uniform(1, 2))
print("Calling:", url)
LIST_OF_URLS = ["https://example.com/{}".format(i) for i in range(25)]
rlq = ratelimitqueue.RateLimitQueue(calls=3, per=2)
n_workers = 4
def worker(rlq):
"""Makes API calls on URLs from queue until it is empty."""
while rlq.qsize() > 0:
url = rlq.get()
make_call_to_slow_api(url)
rlq.task_done()
# load up the queue
for url in LIST_OF_URLS:
rlq.put(url)
# make the calls
with multiprocessing.dummy.Pool(n_workers, worker, (rlq,)) as pool:
rlq.join()
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