axiaoxin

def find_zero_sum(arr):
  sums = [0] * len(arr)
  for i, x in enumerate(arr):
    for j in range(0, i + 1): 
      sums[j] += arr[i]
      if sums[j] == 0:
        return (j, i)

arr = [8, 1, 2, 7, -4, -6]
zero_sum_index = find_zero_sum(arr) 

axiaoxin

#-*- coding:utf-8 -*-
def get_f1(standard_answer, user_answer):
    s_user_answer = set(user_answer)
    s_standard_answer = set(standard_answer)
    correct_results_len = len(s_user_answer & s_standard_answer)

    if correct_results_len > 0:
        precision = float(correct_results_len) / len(user_answer)
        recall = float(correct_results_len) / len(standard_answer)
        f1 = 2 * precision * recall / (precision + recall)

axiaoxin

    def __parse_dict_depth(self, d, depth=0):
        if not isinstance(d, dict) or not d:
            return depth
        return max(self.__parse_dict_depth(v, depth+1) for k, v in d.iteritems())

axiaoxin

{"name":"北京市","zip":"100000","alias":"北京","pinyin":"BeiJing","level":"1","parent_id":"","abbr":"BJ","id":"110000"}
{"name":"东城区","zip":"100010","alias":"东城区","pinyin":"DongChengQu","level":"2","parent_id":"110000","abbr":"DCQ","id":"110101"}
{"name":"西城区","zip":"100032","alias":"西城区","pinyin":"XiChengQu","level":"2","parent_id":"110000","abbr":"XCQ","id":"110102"}
{"name":"朝阳区","zip":"100011","alias":"朝阳区","pinyin":"ChaoYangQu","level":"2","parent_id":"110000","abbr":"CYQ","id":"110105"}
{"name":"丰台区","zip":"100071","alias":"丰台区","pinyin":"FengTaiQu","level":"2","parent_id":"110000","abbr":"FTQ","id":"110106"}
{"name":"石景山区","zip":"100071","alias":"石景山区","pinyin":"ShiJingShanQu","level":"2","parent_id":"110000","abbr":"SJSQ","id":"110107"}
{"name":"海淀区","zip":"100091","alias":"海淀区","pinyin":"HaiDianQu","level":"2","parent_id":"110000","abbr":"HDQ","id":"110108"}
{"name":"门头沟区","zip":"102300","alias":"门头沟区","pinyin":"MenTouGouQu","level":"2","parent_id":"110000","abbr":"MTGQ","id":"110109"}
{"name":"房山区","zip"

axiaoxin

jq -c 'select(.series|startswith("启辰D50"))' 8.1-12.31_all.json |jq -c 'select(.published_at|startswith("2014-09"))' |wc -l

axiaoxin

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

axiaoxin

flatten = lambda lst: reduce(lambda l, i: l + flatten(i) if isinstance(i, (list, tuple)) else l + [i], lst, [])
print flatten([2, [2, [4, 5, [7], [2, [6, 2, 6, [6], 4]], 6]]])
# [2, 2, 4, 5, 7, 2, 6, 2, 6, 6, 4, 6]

axiaoxin

#-*- coding:utf-8 -*-
import urllib2
import re

def get_lrc(name, singer):
    xml_url = 'http://box.zhangmen.baidu.com/x?op=12&count=1&title=%s$$%s$$$$'%(name.encode('utf-8'), singer.encode('utf-8'))
    xml_str = urllib2.urlopen(xml_url).read()
    lrcid_pattern = re.compile(r'<lrcid>(.+?)</lrcid>')
    lrcid = int(re.search(lrcid_pattern, xml_str).group(1))
    lrc_url = "http://box.zhangmen.baidu.com/bdlrc/%d/%d.lrc"%(lrcid//100, lrcid)

axiaoxin

import stepic
from PIL import Image
import sys

useage = 'useage:\nencode: python hideinfo.py IMG INFO OUTPUT\ndecode: python hideinfo.py IMG'

def encode_img(img, info, output):
    img = Image.open(img)

    d = open(info)

axiaoxin

# !/usr/bin/env python  
# -*- coding:utf-8 -*-

import urllib2
import cookielib
import re
import urllib
import os
import Queue
import threading