【Python脚本】Python公众号

公众号：Python那些事

• 日期生成

 

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>>> range (1,10) [1, 2, 3, 4, 5, 6, 7, 8, 9] >>> range (1,10)[::-1] [9, 8, 7, 6, 5, 4, 3, 2, 1]<br>#形成reverse函数的效果

•  获取过去10天的日期

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#!/usr/bin/env python #-*- encoding:utf-8 -*- """获取过去N天的日期""" import datetime def get_nday_list(n):   before_n_days = []   for i in range(1, n + 1)[::-1]:     before_n_days.append(str(datetime.date.today() - datetime.timedelta(days=i)))   return before_n_days d = get_nday_list(10) print(d)

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['2022-03-28', '2022-03-29', '2022-03-30', '2022-03-31', '2022-04-01', '2022-04-02', '2022-04-03', '2022-04-04', '2022-04-05', '2022-04-06']

• 生成一段时间区间内的日期

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#!/usr/bin/env python #-*- encoding:utf-8 -*-   import datetime def create_assist_date(datestart = None, dateend = None):   #创建日期辅助表   if datestart is None:     datestart = '202-04-07'   if dateend is None:     dateend =  datetime.datetime.now().strftime('%Y-%m-%d')   #转为日期格式   datestart = datetime.datetime.strptime(datestart,'%Y-%m-%d')   dateend = datetime.datetime.strptime(dateend,'%Y-%m-%d')   date_list = []   date_list.append(datestart.strftime('%Y-%m-%d'))   while datestart<dateend:     #日期叠加一天     datestart += datetime.timedelta(days =+ 1)     #日期转字符串存入列表     date_list.append(datestart.strftime('%Y-%m-%d'))   return date_list d_list = create_assist_date(datestart='2022-04-02', dateend='2022-04-07') print(d_list)

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1	['2022-04-02', '2022-04-03', '2022-04-04', '2022-04-05', '2022-04-06', '2022-04-07']

•   保存数据到csv

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#!/usr/bin/env python #-*- encoding:utf-8 -*- import os def save_data(data, date):   if not os.path.exists(r'2022_04_07_%s.csv' % date):     with open("2022_04_07_%s.csv" % date, "a+", encoding='utf-8') as f:       f.write("标题，热度，时间,url\n")       for i in data:         title = i["title"]         extra = i["extra"]         time = i['time']         url = i["url"]         row = '{},{},{},{}'.format(title,extra,time,url)         f.write(row)         f.write('\n')   else:     with open("2022_04_07_%s.csv" % data, "a+", encoding='utf-8') as f:       for i in data:         title = i["title"]         extra = i["extra"]         time = i["time"]         url = i["utl"]         row = '{},{},{},{}'.format(title, extra, time, url)         f.write(row)         f.write('\n')