defending的博客

一： In [28]: data=[random.randint(1,20) for _ in range(30)] In [29]: d = dict.fromkeys(data,0) In [32]: for i in data:     ...:     d[i] += 1 二： In [34]: from collections import Counter In [

一： In [76]: d = {x:random.randint(60,100) for x in 'abcdefg'} In [86]: l=list(zip(d.values(),d.keys())) In [87]: l=sorted(l)#从小到大排列 二： In [97]: d.items() Out[97]: dict_items([('a', 80), ('b',

In [1]: from random import randint, sample In [5]: s1 = {x: randint(1,4) for x in sample('abcdefg', randint(3,6))} In [6]: s2 = {x: randint(1,4) for x in sample('abcdefg', randint(3,6))} In

from collections import OrderedDict from random import randint from time import time d = OrderedDict() players = list('asdfghjkl') start = time() for i in range(9): input() p = players.pop(r

创建双向队列 import collections d = collections.deque() append(往右边添加一个元素) import collections d = collections.deque() d.append(1) d.append(2) print(d) #输出：deque([1, 2]) appendleft（往左边添加一个元素）

https://github.com/Belval/pdf2image       from pdf2image import convert_from_path, convert_from_bytes import os, time, sys def pdf2jpg(): try: image = convert_from_path(sys.argv[1...