Cochran-Armitage trend test 和卡方检验的区别
Posted
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了Cochran-Armitage trend test 和卡方检验的区别相关的知识,希望对你有一定的参考价值。
参考技术A 一个是趋势判断,一个是差异性判断python Scrapy google trends
# -*- coding: utf-8 -*- import scrapy,json from urllib import parse class GoogleTrendsSpider(scrapy.Spider): name = ‘google_trends‘ allowed_domains = [‘google.com‘] #获取token地址 GENERAL_URL = ‘https://trends.google.com/trends/api/explore?{}‘ #获取关键字csv地址 INTEREST_OVER_TIME_URL = ‘https://trends.google.com/trends/api/widgetdata/multiline/csv?{}‘ #开启useragent和代理中间件 custom_settings = { ‘DOWNLOADER_MIDDLEWARES‘ : { ‘blockchain.middlewares.RandomUserAgent‘: 390, ‘blockchain.middlewares.RandomProxy‘: 544, }, # ‘COOKIES_ENABLED‘ : False ‘DOWNLOAD_DELAY‘:1 } def start_requests(self): ‘‘‘ 从页面中获取的csv下载url参数 ‘keyword‘: ‘关键字‘, ‘time‘: ‘now 7-d‘, ‘geo‘: ‘‘ ‘‘‘ req = { ‘comparisonItem‘:[{‘keyword‘: ‘关键字‘, ‘time‘: ‘now 7-d‘, ‘geo‘: ‘‘}], ‘category‘: 0 } req = json.dumps(req).encode(‘utf-8‘) token_payload = { ‘hl‘: b‘en-US‘, ‘tz‘: b‘-480‘, ‘req‘: req, ‘property‘: b‘‘, } body = parse.urlencode(token_payload) url = self.GENERAL_URL.format(body) reqs.append(scrapy.Request(url=url,callback=self.parse_token,meta={‘item‘:{‘coin_id‘:row.id}})) return reqs def parse_token(self,response): ‘‘‘ 解析结果,获取token ‘‘‘ bodyObj = json.loads(response.body.decode(‘utf-8‘)[4:]) for row in bodyObj[‘widgets‘]: if row[‘id‘] == ‘TIMESERIES‘: token = row[‘token‘] request = row[‘request‘] params = { ‘tz‘: ‘-480‘, ‘req‘: json.dumps(request), ‘token‘:token } body = parse.urlencode(params) url = self.INTEREST_OVER_TIME_URL.format(body) yield scrapy.Request(url=url,callback=self.parse_row,meta={‘item‘:response.meta[‘item‘]}) def parse_row(self, response): ‘‘‘ 解析csv ‘‘‘ bodytext = response.body.decode(‘utf-8‘) print(bodytext)
抄自:pytrends
以上是关于Cochran-Armitage trend test 和卡方检验的区别的主要内容,如果未能解决你的问题,请参考以下文章
佳明 Vivomove Trend 智能手表 评测 佳明 Vivomove Trend 智能手表参数配置
Crypto Exchange Security: Approaches and Trends