Skip to main content

Window based counters

Project description

… and with the sign 0 … any number may be written


travis-ci coveralls landscape pypi license

Count things in various time based windows using in-memory, redis or riak storage.


Install the basic package:

pip install sifr

Install sifr with redis dependencies:

pip install 'sifr[redis]'

Install sifr with riak dependencies:

pip install 'sifr[riak]'

Install sifr with sifrd service dependencies:

pip install 'sifr[daemon]'


Using sifr with direct storage

import datetime
import redis, riak

from sifr.span import Year, Month, Day, Hour, Minute, get_time_spans
from import MemoryStorage, RedisStorage, RiakStorage

redis_client = redis.Redis()
redis_store = RedisStorage(redis_client)

riak_client = riak.RiakClient()
riak_store = RiakStorage(riak_client)

memory_store = MemoryStorage()

stores = [memory_store, redis_store, riak_store]

now =
user_id = 1
page = "index.html"

# construct the windows. These are the resolutions that will be tracked.
spans = [
    span(now, ["views", "user", user_id])
    for span in [Year, Month, Day, Hour, Minute]
# incr a counter for all resolutions
[store.incr_multi(spans) for store in stores]

# incr a unique counter
[store.incr_unique_multi(spans, page) for store in stores]
[store.incr_unique_multi(spans, page) for store in stores]

# track the page view
[store.track_multi(spans, page) for store in stores]
[store.track_multi(spans, page) for store in stores]

# get the counts/uniques for a single year window
for store in stores:
  assert 1 == store.count(Year(now, ["views", "user", 1]))
  assert 1 == store.cardinality(Year(now, ["views", "user", 1]))
  assert set(["index.html"]) == store.uniques(Year(now, ["views", "user", 1]))

# get the counts/uniques for a range
start = now - datetime.timedelta(minutes=1)
end = now + datetime.timedelta(minutes=1)

span_range = get_time_spans(start, end, ["views", "user", 1], [Minute])
for store in stores:
  assert [1] == [store.count(span) for span in span_range]
  assert [1] == [store.cardinality(span) for span in span_range]
  assert [set(["index.html"])] == [store.uniques(span) for span in span_range]

Using sifr via rpc

sifr.yml (using a redis backend)

storage: redis
redis_url: redis://localhost:6379/1
host: localhost
port: 6000

sifr.yml (using a riak backend)

storage: riak
    - host: localhost
      pb_port: 8087
host: localhost
port: 6000

Run the server

sifrd msgpack_server --config=sifr.yml

Interact with the server

from sifr import RPCClient
client = RPCCient(host='localhost', port=6000, resolutions=["year", "month", "day"])
client.incr_unique("views:user:1", "index.html")
client.incr_unique("views:user:1", "index.html")
client.track("views:user:1", "index.html")
client.track("views:user:1", "index.html")

assert 1 == client.count("views:user:1",, "day")
assert 1 == client.cardinality("views:user:1",, "day")
assert set(["index.html"]) == client.uniques("views:user:1",, "day")



0.0.4 2015-06-16

  • Removed transactional pipelines from redis storage.

0.0.3 2015-06-10

  • Initial release

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Filename, size & hash SHA256 hash help File type Python version Upload date
sifr-0.0.4-py2.7.egg (38.0 kB) Copy SHA256 hash SHA256 Egg 2.7
sifr-0.0.4.tar.gz (224.3 kB) Copy SHA256 hash SHA256 Source None

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN SignalFx SignalFx Supporter DigiCert DigiCert EV certificate StatusPage StatusPage Status page