import json # with open("C:\\Users\\yahui.zhao\\Desktop\\aaa666.json","w") as jsonfile: # users = '[{"uname":"zhangsan","upwd":"123"},{"uname":"lisi","upwd":"123"},{"uname":"wangwu","upwd":"123"}]'#不要忘了最外面的单引号 # jsonfile.write(users) #上面的程序运行一次生成文件即可,不然再次运行文件会被覆盖 # json文件一定要用程序生成,不然接着运行会报错 def readjson(dizhi): with open(dizhi,"r") as jsondata1: jsondata=jsondata1.read() pythondata=json.loads(jsondata) return pythondata def writejson(pythondata3,dizhi1): jsondata1=json.dumps(pythondata3)#必须得有这一步写入后才是json文件哦 print("最终写入的值类型",type(jsondata1)) with open(dizhi1,"w") as jsondata: jsondata.write(jsondata1) # zuizhong=jsondata.write(jsondata1)#write()函数最终是不能被赋值的,要想赋值得先read出来 # print(zuizhong) def denglu(): nameisin=0 username=input("请输入用户名") userpwd=input("请输入密码") pythonuser=readjson("C:\\Users\\yahui.zhao\\Desktop\\aaa666.json") for user1 in pythonuser: if username==user1["uname"]: if userpwd==user1["upwd"]: nameisin=1 print("登录成功") if nameisin==0: print("登录失败") def adduser(): username1=input("请输入用户名") userpwd1=input("请输入密码") dictuser1={"uname":username1,"upwd":userpwd1} pythondatas=readjson("C:\\Users\\yahui.zhao\\Desktop\\aaa666.json") print("打印前的字符串",pythondatas) print(type(pythondatas)) pythondatas.append(dictuser1)#append函数不能被赋值,添加到列表后没有返回 print("要输入的词",pythondatas) writejson(pythondatas, "C:\\Users\\yahui.zhao\\Desktop\\aaa666.json") pythondatas3=readjson("C:\\Users\\yahui.zhao\\Desktop\\aaa666.json") print("最后",pythondatas3) if __name__=='__main__': denglu() adduser()
python基础语法--json存储数据
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转载自blog.csdn.net/qq_40333984/article/details/125501876
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