标签：跨平台 api 地铁 国际 ecb sys.path 事故 直接 一句话
今日内容主要有：
一、pickle模块
二、shelve模块
三、json模块
四、json练习
五、xml模块
六、xml模块
七、configparser模块
一、pickle模块
#pickle是一个用来序列化的模块 #序列化是什么？ #指的是将内存中的数据结构转换为一种中间格式 并存储到硬盘上 #反序列化是什么？ #将硬盘上存储的中间格式数据再还原为内存中的数据结构 #为什么要序列化？ #就是为了将数据持久存储 #之前学过的文件也能持久化存储 但是操作起来非常麻烦 #总结：pickle模块主要功能 # dump # load # dumps 序列化 # loads 序列化 # 不带s是帮你封装了read和writh import pickle #用户注册得到的数据 name = "高根" password = "123" height = "1.5" hobby = ["吃","喝","飘"] with open("userdb.txt","wt",encoding="utf-8") as f: text="|".join([name,password,str(height)]) f.write(text) #序列化的过程 user={"name":name,"password":password,"height":height,"hobby":hobby} #支持python中所有格式 with open("userdb.pkl","wb",)as f: userbytes=pickle.dumps(user) f.write(userbytes) #反序列化过程 with open("userdb.pkl","rb")as f: userbytes=f.read() user=pickle.loads(userbytes) print(user) print(type(user)) #dump使用 直接序列化到文件 with open("userdb.pkl","wb")as f: pickle.dump(user,f) #load从文件反序列化 with open("userdb.pkl","rb")as f: user=pickle.load(f) print(user) #打包成函数（序列化） def myload(filename): with open(filename,"rb") as f: return pickle.load(f)
二、shelve模块
#内存->内置->sys.path import shelve """ shelve模块也用于序列化 它与pickle不同之处在于 不需要关心文件模式什么的 直接把他当成一个字典来看待 它可用于进行修改 """ user={"name":"高根"} s = shelve.open("userdb.shv") s["user"]=user s.close() s=shelve.open("userdb.shv",writeback=True) print(s["user"]) s["user"]["age"] = 20 s.close()
三、json模块
""" pickle和shelve 序列化后的到的数据只能python才能解析 通常企业开发不可能做一个当即程序 都需要联网进行计算机间交互 我么必须要保证这个数据 能够跨平台使用 JSON是什么？ Java script object notation 就是对象表示法 var obj = {“name”：“egon”} 对于我们开发而言，json就是一种通用的数据格式 任何语言都能解析 js中的数据类型 python数据类型的对应关系 {} 字典 [] list string“” str int/float int/float true/false True/False null None json的语法规范 最外层通常是一个字典或列表 {} or [] 只要你想写个json格式的数据最外层直接写{} 字符串必须是双引号，可以在面套任意多的层次 json模块的核心功能 dump dumps load loads 不带s 封装了write和read功能 """ import json # 反序列化 with open("a.json","rt",encoding="utf-8")as f: res=json.loads(f.read()) print(type(res)) with open("a.json",encoding="utf-8") as f: print(json.load(f)) # 直接解析字符串的json为python对象 jsontext = """{ "user": [{ "name": "egon", "age": "18" }, { "name": "egon", "age": "18" } ] }""" res=json.loads(jsontext) print(res) mydic={ "user": [{ "name": "egon", "age": "18" }, { "name": "egon", "age": "18" } ] } with open("b.json", "wt",encoding="utf-8") as f: f.write(json.dumps(mydic)) with open("b.json", "wt",encoding="utf-8") as f: json.dump(mydic, f) dic = {"a":"理查德姑妈","b":"杰克船长","c":"神秘客人"} with open("c.json","wt",encoding="utf-8") as f: f.write(json.dumps(dic)) with open("c.json","rt",encoding="utf-8")as f: d = json.loads(f.read()) print(d)
四、json练习
#将下面内容存储到（news.json）文件
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"thumbnail_pic_s02":"http:\/\/03imgmini.eastday.com\/mobile\/20181017\/20181017100045_99ac69a133f6b87f242b3651cb747b83_2_mwpm_03200403.jpg", "thumbnail_pic_s03":"http:\/\/03imgmini.eastday.com\/mobile\/20181017\/20181017100045_99ac69a133f6b87f242b3651cb747b83_1_mwpm_03200403.jpg" }, { "uniquekey":"c4d04bf47c5a45bcb7f0313b60de84d8", "title":"国产全新大众速腾比朗逸大一圈！这回你满意了吧！", "date":"2018-10-17 10:00", "category":"头条", "author_name":"快车报", "url":"http:\/\/mini.eastday.com\/mobile\/181017100014570.html", "thumbnail_pic_s":"http:\/\/03imgmini.eastday.com\/mobile\/20181017\/20181017100014_316d207ba4061e7d5651db8259e88319_8_mwpm_03200403.jpg", "thumbnail_pic_s02":"http:\/\/03imgmini.eastday.com\/mobile\/20181017\/20181017100014_316d207ba4061e7d5651db8259e88319_3_mwpm_03200403.jpg", "thumbnail_pic_s03":"http:\/\/03imgmini.eastday.com\/mobile\/20181017\/20181017100014_316d207ba4061e7d5651db8259e88319_11_mwpm_03200403.jpg" }, { "uniquekey":"48721b05ac0e8cc8a1419f4dde398984", "title":"终于看到NPC团综的希望，九个小哥哥集体飞北京，疑似团综开拍", "date":"2018-10-17 10:00", "category":"头条", "author_name":"用微笑离开后的坚强", "url":"http:\/\/mini.eastday.com\/mobile\/181017100006065.html", "thumbnail_pic_s":"http:\/\/03imgmini.eastday.com\/mobile\/20181017\/20181017100006_29e6023f4ca7a46c5eb7f470ac2c9eb3_3_mwpm_03200403.jpg", "thumbnail_pic_s02":"http:\/\/03imgmini.eastday.com\/mobile\/20181017\/20181017100006_29e6023f4ca7a46c5eb7f470ac2c9eb3_1_mwpm_03200403.jpg", "thumbnail_pic_s03":"http:\/\/03imgmini.eastday.com\/mobile\/20181017\/20181017100006_29e6023f4ca7a46c5eb7f470ac2c9eb3_6_mwpm_03200403.jpg" }, { "uniquekey":"2bdc6124ecee5a3789c994dfec2ced06", "title":"RNG小组第一EDG小组第二 这让网友产生一个可怕的想法！", "date":"2018-10-17 09:58", "category":"头条", "author_name":"淘游助手", "url":"http:\/\/mini.eastday.com\/mobile\/181017095804681.html", "thumbnail_pic_s":"http:\/\/05imgmini.eastday.com\/mobile\/20181017\/20181017095804_a2c4f5c0b9035a369f10027a834c9fe9_3_mwpm_03200403.jpg", 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"author_name":"HOT男人", "url":"http:\/\/mini.eastday.com\/mobile\/181017094950231.html", "thumbnail_pic_s":"http:\/\/03imgmini.eastday.com\/mobile\/20181017\/20181017094950_3862216a8fc853bd21921b0891df563d_2_mwpm_03200403.jpg", "thumbnail_pic_s02":"http:\/\/03imgmini.eastday.com\/mobile\/20181017\/20181017094950_3862216a8fc853bd21921b0891df563d_5_mwpm_03200403.jpg", "thumbnail_pic_s03":"http:\/\/03imgmini.eastday.com\/mobile\/20181017\/20181017094950_3862216a8fc853bd21921b0891df563d_15_mwpm_03200403.jpg" }, { "uniquekey":"8f4d38978ccf590a6b99aabf195f2652", "title":"夜猫子的你应该知道的“小秘密”", "date":"2018-10-17 09:48", "category":"头条", "author_name":"广州建国医院精神科", "url":"http:\/\/mini.eastday.com\/mobile\/181017094842986.html", "thumbnail_pic_s":"http:\/\/01imgmini.eastday.com\/mobile\/20181017\/20181017_0a964b132e85c005a82ac71c2ab645af_mwpm_03200403.jpg" }, { "uniquekey":"ffc9347ca9a76a60ca4e042a66cd6e0a", "title":"不卸妆就分手？19岁男生为爱卸掉自己挚爱的妆容，素颜让人震撼", "date":"2018-10-17 09:47", "category":"头条", 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习题：把news.json中的新闻数据提取出来打印控制台
with open("news.json","rt",encoding="utf-8") as f: res = json.load(f) print(type(res)) for dic in res["result"]["data"]: for key in dic: print("%s:%s"%(key,dic[key]))
标签：跨平台 api 地铁 国际 ecb sys.path 事故 直接 一句话
原文地址：https://www.cnblogs.com/wuzhengzheng/p/9813134.html
