Python學習---IO的異步[twisted模塊]

安裝twisted模塊

Linux:

  pip3 install twisted

Window:

a. http://www.lfd.uci.edu/~gohlke/pythonlibs/#twisted,

下載：Twisted-17.1.0-cp35-cp35m-win_amd64.whl

b. 進入文件所在目錄

c.  pip3 install Twisted-17.1.0-cp35-cp35m-win_amd64.whl

Twisted實例[小有問題]

from twisted.web.client import getPage  # 專門用來發送HTTP請求的
from twisted.web.client import defer
from twisted.internet import reactor    # 循環等待用戶請求的響應

def all_done(arg):
    reactor.stop()

def callback(contents):
    print(contents)

deferred_list = []

url_list = ['http://www.bing.com', 'http://www.baidu.com', ]
for url in url_list:
    deferred = getPage(bytes(url, encoding='utf8'))  # 加載url交給getPage()
    deferred.addCallback(callback)  # 回調函數表示請求完成後，須要作的操做
    # deferred_list.append(deferred)  #

# dlist = defer.DeferredList(deferred_list)
# dlist.addBoth(all_done)

reactor.run()   # de