asynchronizer 0.2.4

Basic use

Suppose you have a function like this:

import requests

def send_requests():
    r = requests.get('http://httpbin.org/get')
    print r.status_code

for _ in range(20):
    send_requests()

You can modify it like this to make it asynchronous:

import requests
from asynchronizer import asynchronize, Wait

@asynchronize
def send_requests():
    r = requests.get('http://httpbin.org/get')
    print r.status_code

for _ in range(20):
    send_requests()

Wait()

Example Script:

This example script will take 55 seconds to run normally, but only 10 seconds when run asynchronously

import time
from asynchronizer import asynchronize, Wait, setWorkers

@asynchronize
def func(i):
    time.sleep(i)
    print i

for i in range(1,11):
    func(i)

Wait()

Things to keep in mind

• The function Wait() is necessary. If Wait() is not present, your script will end without waiting for any unfinished functions to finish.

• The function Wait() is also a blocking function, meaning that the execution of your script will pause here till all the async functions called before this are finished. This is why it should usually be added at the end of your script

• The decorated functions are async to each other, but the code inside the functions is synchronous, which means this is wrong:

  # wrong way
  @asynchronize
  def send_requests():
      for _ in range(20):
          r = requests.get('http://httpbin.org/get')
  
  send_requests()

  and this is the correct way:

  # correct way
  @asynchronize
  def send_requests():
      r = requests.get('http://httpbin.org/get')
  
  for _ in range(20):
      send_requests()

• Instead of returning values from your functions, send them to a callback. For example:

  @asynchronize
  def send_requests():
      r = requests.get('http://httpbin.org/get')
      parse(r.text)
      # instead of return r.text

Advanced use

• If you want to use a custom number of workers, just add setWorkers(n) at the start of your script, with n being the number of concurrent greenlet threads you want. Default is 32.

• To assign priority to a specific function call, add priority=n to the parameters of the function call, with n being the priority you want to set. For Example: func(param1,param2,param3,priority=2)