Question

我正在尝试让程序读取CSV文件（“Airports.csv”）并将其保存到字典中，我可以在其中输入密钥，这将调用与此密钥关联的机场对象。

当我尝试打印整个列表以确保它正常工作时，它会打印密钥但打印{'GKA: <__main__.Airport object as 0x02E92570>}'

由于问题是基于使用字典对象而不是列表，你能解释我出错的地方吗？我可能已经混淆了一些它并且走错了路，因为我总是用列表而不是对象制作字典。

我附上了CSV文件和教程。

如果有人能告诉我如何正确调用字典中的对象。谢谢

    import csv
    class Airport:

        def __init__(self, idx=-1, airportname='', cityname='', countryname='', code3='',
        code4='',lat=0,long=0, altitude=0,timezone='',DST='',Tz=''):

            self.idx=idx
            self.airportname=airportname
            self.cityname=cityname
            self.countryname=countryname
            self.code3=code3
            self.code4=code4
            self.lat=lat
            self.long=long
            self.lat=lat
            self.altitude=altitude
            self.timezone=timezone
            self.DST=DST
            self.Tz=Tz

        def dictairportChosen(self,filename):

            self.__airportDict={}

            f=open(filename, encoding="utf8")
            csvreader = csv.reader(f)

            for idx, airportname, cityname, countryname, code3, code4, lat, long, altitude, timezone, DST, TZ,  in csvreader:
                airport=Airport(idx, airportname, cityname, countryname, code3, code4, lat, long, altitude, timezone, DST, TZ)
                self.__airportDict[code3]=airport
                print(self.__airportDict)


    aAirportChosen=Airport()
    aAirportChosen.dictairportChosen("airports.csv")

这是CSV文件的片段：

    1,"Goroka","Goroka","Papua New Guinea","GKA","AYGA",-6.081689,145.391881,5282,10,"U","Pacific/Port_Moresby"
    2,"Madang","Madang","Papua New Guinea","MAG","AYMD",-5.207083,145.7887,20,10,"U","Pacific/Port_Moresby"
    3,"Mount Hagen","Mount Hagen","Papua New Guinea","HGU","AYMH",-5.826789,144.295861,5388,10,"U","Pacific/Port_Moresby"
    4,"Nadzab","Nadzab","Papua New Guinea","LAE","AYNZ",-6.569828,146.726242,239,10,"U","Pacific/Port_Moresby"
    5,"Port Moresby Jacksons Intl","Port Moresby","Papua New Guinea","POM","AYPY",-9.443383,147.22005,146,10,"U","Pacific/Port_Moresby"
    6,"Wewak Intl","Wewak","Papua New Guinea","WWK","AYWK",-3.583828,143.669186,19,10,"U","Pacific/Port_Moresby"
    7,"Narsarsuaq","Narssarssuaq","Greenland","UAK","BGBW",61.160517,-45.425978,112,-3,"E","America/Godthab"
    8,"Nuuk","Godthaab","Greenland","GOH","BGGH",64.190922,-51.678064,283,-3,"E","America/Godthab"

实际教程的问题是： 2。写码至读从该 CSV 和创建一个字典的飞机场对象更换该名单在该字典同飞机场对象。您应该结束向上同一个字典那具有该飞机场码如一个键和一个飞机场宾语如该抬头值允许该码下面至运行：

airportLookupDict={‘DUB’, airport(….),‘LHR’, airport(….)}
myairport=airportLookupDict.get(‘DUB’)
print(myairport.name)
outputs:
DUBLIN

Answer 1

未经测试，但您可以尝试

self.__airportDict[code3]=airport.__dict__

来自Python dictionary from an object's fields

Answer 2

您的代码没有任何问题。它在问题中按预期工作。如果要访问列表中的各个元素，只需将实体名称添加到列表中，如下所示：

    for keys, values in self.__airportDict.items():
        print keys
        print values.airportname

CSV读入字典

2 个答案: