tcpj / evilshortgen

Shortest and hackish tornado assync calls

Evilshortgen

It's a best way to break your app =)

Your code without shortgen looks like:

def fetch(arg1, arg2, callback):
    pass

@tornado.gen.engine
def get(self):
    value = yield tornado.gen.Task(fetch,
        arg1='arg1', arg1='arg2'
    )
    self.write(value)

But with shortgen evil magic:

@fastgen
def fetch(arg1, arg2, callback):
    pass

@tornado.gen.engine
@shortgen
def get(self):
    value << fetch(
        arg1='arg1', arg1='arg2'
    )
    self.write(value)

Usage

Call exist code like assyncmongo, patch and call with '_e':

from evilshortgen import shortgen, shortpatch
from asyncmongo.cursor import Cursor
shortpatch(Cursor)

@tornado.gen.engine
@shortgen
def get(self):
    result, status << self.db.users.find_one_e({
        '_id': ObjectId(self.user_id),
        },
    )

Call new code with decorator:

from evilshortgen import shortgen, fastgen

@fastgen
def fetch(arg1, arg2, callback):
    pass

@tornado.gen.engine
@shortgen
def get(self):
    value << fetch(
        arg1='arg1', arg1='arg2'
    )

Known issues

Short calls set only values, not arguments:

self.a << fetch()  # not work
a << fetch()  # work

Group tuple assignment not work:

(a, b), c << fetch()  # not work
a, b, c << fetch()  # work