将 csv 文件中的值存储到类的属性中

Question

我正在尝试为调度问题编写代码。今天我的代码有问题。我正在尝试将 csv 文件中的值存储到类的属性中。请帮助我理解它。import mathimport csvfrom math import radians, sin, cos, acosclass masterTrainer:        #class generated for the master trainers for the whole state    with open("mtData.csv", "r") as f_input:        csv_input = csv.DictReader(f_input)        for row in csv_input:            masterTrainer.name = row['Name']            masterTrainer.location = row['Location']            masterTrainer.subject = row['Subject']            masterTrainer.latitude = row['latitude']            masterTrainer.longitude = row['longitude']    def distanceCalculator(latitude1,longitude1,latitude2,longitude2):        slat = radians(latitude1)        slon = radians(longitude1)        elat = radians(latitude2)        elon = radians(longitude2)        dist = 6371.01 * acos(sin(slat)*sin(elat) + cos(slat)*cos(elat)*cos(slon - elon))        print("The distance is %.2fkm." % dist)class venue:    with open("venueData.csv", "r") as f_input:        csv_input = csv.DictReader(f_input)        for row in csv_input:            venue.name = row['Name']            venue.latitude = row['latitude']            venue.longitude = row['longitude']print(masterTrainer.distanceCalculator(float(masterTrainer.latitude),float(masterTrainer.longitude),float(venue.latitude),float(venue.longitude)),masterTrainer.name, venue.name)上面的代码显示了一个属性错误。AttributeError: type object 'masterTrainer' has no attribute 'latitude'

Answer 1

当您在 python 中声明一个类，并希望在该类的某个成员上存储值时，正确的做法是：

class NameOfClass:

    def __init__(self, something, ...): #of course change "..." to the rest of arguments

        self.someAttribute = something

所以，首先定义一个方法调用__init_\_(self, ...):并把你with open(....) as ...:放在里面，然后把所有的改成masterTrainer.whatever里面self.whatever。