使用python的多线程下载循环
我有一张单子使用python的多线程下载循环,python,multithreading,loops,fetch,Python,Multithreading,Loops,Fetch,我有一张单子 symbols = ('GGP', 'JPM', 'AIG', 'AMZN','GGP', 'rx', 'jnj', 'osip') URL = "http://www.Xxxx_symbol=%s" def fetch(symbols): try: url = URL % '+'.join(symbols) fp = urllib2.urlopen(url) try: data = fp.read
symbols = ('GGP', 'JPM', 'AIG', 'AMZN','GGP', 'rx', 'jnj', 'osip')
URL = "http://www.Xxxx_symbol=%s"
def fetch(symbols):
try:
url = URL % '+'.join(symbols)
fp = urllib2.urlopen(url)
try:
data = fp.read()
finally:
fp.close()
return data
except Exception as e:
print "No Internet Access"
我正在尝试使用多线程(4个线程)获取进程,而不是多进程,并且不使用twisted。Url fetch的输出文件是csv,其中有7行标题信息,我想去掉这些信息。我想在它自己的文件中循环每个符号。我以前使用过这个获取代码。我可以得到一个有一个元素的符号列表 这应该让您开始:
from threading import Thread, Lock
data = {}
data_lock = Lock()
class Fetcher(Thread):
def __init__(self, symbol):
super(Thread, self).__init__()
Thread.__init__(self)
self.symbol = symbol
def run(self):
# put the code from fetch() here
# replace 'data = fp.read()' with the following
tmp = fp.read()
data_lock.acquire()
data[self.symbol] = tmp
data_lock.release()
# Start a new Fetcher thread like this:
fetcher = Fetcher(symbol)
fetcher.start()
# To wait for the thread to finish, use Thread.join():
fetcher.join()