# or, in absolute terms, instead of 275 ms it may take 220 ms.
from gevent.monkey import patch_builtins, patch_contextvars, patch_thread, patch_time, patch_os, patch_queue, patch_select, \
patch_selectors, patch_signal, patch_socket, patch_ssl, patch_subprocess, patch_sys
# Note that the order of patching matters, just like in patch_all
patch_os()
patch_time()
patch_thread()
patch_sys()
patch_socket()
patch_select()
patch_selectors()
patch_ssl()
patch_subprocess()
patch_builtins()
patch_signal()
patch_queue()
patch_contextvars()
# stdlib
import locale
import logging
import os
import ssl
import sys
from logging.config import dictConfig
# ConcurrentLogHandler - updates stlidb's logging config on import so this needs to stay
import cloghandler
cloghandler = cloghandler # For pyflakes
from lib.util import human_format
from exchange.bittrex import Bittrex
from exchange.data_proxy import DataProxy
import datetime
import dateutil.parser
import time
import pandas as pd
import gevent
from gevent import monkey
monkey.patch_time()
monkey.patch_socket()
monkey.patch_signal()
monkey.patch_os()
monkey.patch_dns()
monkey.patch_sys()
from exchange.data_proxy import DataProxy
SPREAD_THRESHOLD = 0.1
def on_tick(pair, exchange):
my_sell_order = 0
my_buy_order = 0
# run in loop outside 3s/tick
data_api = DataProxy(exchange)
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# brew install libevent
# sudo easy_install greenlet
# install gevent in pycharm
# greenlet 基本思想:
# 当一个greenlet遇到IO操作时，比如访问网络，就自动切换到其他的greenlet，
# 等到IO操作完成，再在适当的时候切换回来继续执行
from gevent import monkey; monkey.patch_signal()
import gevent, time
def f(n):
for i in range(n):
print gevent.getcurrent(), i
time.sleep(1)
g1 = gevent.spawn(f,5)
g2 = gevent.spawn(f,5)
g3 = gevent.spawn(f,5)
g1.join()
g2.join()
g3.join()
# 运行以上代码, 可以看到，3个greenlet是依次运行而不是交替运行。
# 要让greenlet交替运行，可以通过gevent.sleep()交出控制权：
print '\n使用gevent.sleep()让greenlet交替运行:'