hest

def get_count(q):
    count_q = q.statement.with_only_columns([func.count()]).order_by(None)
    count = q.session.execute(count_q).scalar()
    return count

q = session.query(TestModel).filter(...).order_by(...)

# Slow: SELECT COUNT(*) FROM (SELECT ... FROM TestModel WHERE ...) ...
print q.count()

baojie

import multiprocessing

# split a list into evenly sized chunks
def chunks(l, n):
    return [l[i:i+n] for i in range(0, len(l), n)]


def do_job(job_id, data_slice):
    for item in data_slice:
        print "job", job_id, item

raelgc

Setup a Local Only SMTP Email Server (Linux, Unix, Mac)

1 - Point localhost.com to your machine

Most of programs will not accept an email using just @localhost as domain. So, edit /etc/hosts file to make the domain localhost.com point to your machine, including this content to the file:

127.0.0.1 localhost.com

2 - Install Postfix

szinck

from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
        
engine = create_engine("postgresql://user:@host/schema")
Base = declarative_base()
Base.metadata.reflect(engine)

bnyeggen

from multiprocessing import Pool
from functools import partial

def _pickle_method(method):
	func_name = method.im_func.__name__
	obj = method.im_self
	cls = method.im_class
	if func_name.startswith('__') and not func_name.endswith('__'): #deal with mangled names
		cls_name = cls.__name__.lstrip('_')
		func_name = '_' + cls_name + func_name