import random def windex(lst):
'''an attempt to make a random.choose() function that makes weighted choices
accepts a list of tuples with the item and probability as a pair'''
wtotal = sum([x[1] for x in lst])
n = random.uniform(0, wtotal)
for item, weight in lst:
if n < weight:
break
n = n - weight
return item
8.8. queue — A synchronized queue class¶
queue -- 一个同步队列类
The queue module implements multi-producer, multi-consumer queues. It is especially useful in threaded programming when information must be exchanged safely between multiple threads. The Queue class in this module implemen ......
写了几个有关operaminimod的python小程序
firefox->opm书签转换
import re
def pipeiwangzhi(a):
s=[]
pp= re.compile(r'<DT><A HREF="(.*)" ADD_DATE=(.*>)(.*)</A>')
m=pp.search(a)
s1=[]
......
