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Python extensions by alkasm

Project description


A collection of useful utilities and utility libraries for my projects.


pip install pykasm-alkasm



A timeout will not help with indefinite blocking. Concurrent futures will attempt to cancel the pull on the generator, if possible.

from pykasm import TimeoutIterable
from time import sleep

def tired_generator(n):
    for seconds in range(1, n+1):
        yield f"slept for {seconds} second(s)"

# will timeout if more than 3 seconds elapse between iterations
for v in TimeoutIterable(tired_generator(5), timeout=3.14):
sleeping for 1 second(s)
sleeping for 2 second(s)
sleeping for 3 second(s)


The stream buffer is not particularly robust.

  • Indefinite blocking will cause the thread to also indefinitely block.
  • Generators that tax the CPU heavily may have a hard time shutting off.
  • Use with caution, and not in production.
from pykasm import StreamBuffer
from itertools import count
from time import sleep

# collect values from infinite generator `count()` over a period of time
sleep_time = 0.0001
with StreamBuffer(count()) as buf:
    counts = list(buf.flush())
print(f"collected {len(counts)} values in {sleep_time} seconds!")
collected 13647 values in 0.0001 seconds!


You'll need to set logging level to DEBUG to see the timer messages.

from pykasm import timed
from time import sleep
import logging

def takes_a_second():

DEBUG:root:takes_a_second took 1004.352 ms

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