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序列化模块 # 文件存取时,遇到的矛盾. # 数据 读取出来时,反转不回去. # 通常数据通过网络传出去最终的格局必需bytes # 序列化模块感化: # 将一组数据布局转化成特殊的序列(特殊的字符串,bytes)并且还可以反转回去. # json 模块: 是所有语言公认的一种序列.最最常用的 # 所以撑持的python数据布局有限: int str bool dict list(tuple),None,float # pickle模块: 只能python语言中使用的,序列化模块: # 撑持python所有的数据类型以及东西. import json # dumps,loads 主要用于网络传输,可以用于文件的存取. # dic = {'username': '太白', 'password': 123,'status': False} # ret=json.dumps(dic) # print(ret,type(ret)) # ret_dict = json.loads(ret) # print(ret,type(ret_dict)) # 特殊的参数ensure_ascii确定是不是使用ascii码 sort_keys我可以给这个字典排序 # dic = {'username': '太白', 'password': 123,'status': False} # ret = json.dumps(dic,ensure_ascii=False,sort_keys=True) # print(ret,type(ret)) # dump load: 单个数据的存取文件. # import json # dic = {'username': '太白', 'password': 123,'status': False} # with open('jsonlx1.json',encoding='utf-8',mode='w') as f1: # json.dump(dic,f1) # # with open('jsonlx1.json',encoding='utf-8') as f1: # dic1 = json.load(f1) # print(dic1,type(dic1)) # 多个数据如何存储到一个文件中 必需换行 不然读取时不识别 会报错? # import json # dic1 = {'username': '太白', 'password': 123,'status': False} # dic2 = {'username': 'alex', 'password': 123,'status': False} # dic3 = {'username': 'ly', 'password': 123,'status': False} # with open('jsonmore.json',encoding='utf-8',mode='a') as f1: # f1.write(f'{json.dumps(dic1)}\n{json.dumps(dic2)}\n{json.dumps(dic3)}') # # with open('jsonmore.json',encoding='utf-8') as f1: # for line in f1: # ret = json.loads(line) # print(ret,type(ret)) # pickle import pickle # dumps,loads 只能是网络传输#只能python语言中使用的,序列化模块 撑持python所有的数据类型以及东西. # dumps,loads 只能是网络传输 直接转化为字节 # l1 = ['wusir', '太白', '小黑', 666] # ret = pickle.dumps(l1) # print(ret) # l2 = pickle.loads(ret) # print(l2,type(l2)) # dump load 数据布局存取文件. import pickle # l1 = ['wusir', '太白', '小黑', 666] # with open('pickle操练.pickle',mode='wb') as f1: # pickle.dump(l1,f1) # with open('pickle操练.pickle', mode='rb') as f1: # ret = pickle.load(f1) # print(ret,type(ret)) # 多个数据写入文件 # l1 = ['wusir', '太白', '小黑1', 666] # l2 = ['wusir', '太白', '小黑2', 666] # l3 = ['wusir', '太白', '小黑3', 666] # with open('pickle操练1.pickle',mode='wb') as f1: # # pickle.dump(l1,f1) # # pickle.dump(l2,f1) # # pickle.dump(l3,f1) # # with open('pickle操练1.pickle', mode='rb') as f1: # # ret1 = pickle.load(f1) # # ret2 = pickle.load(f1) # # ret3 = pickle.load(f1) # # print(ret1,ret2,ret3) # while 1: # try: # ret1 = pickle.load(f1) # print(ret1) # except Exception: # break #

005json & pickle

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