为政府数据创建Python程序

Question

我正在尝试实现一个程序，该程序使用Python对象来表示数据来执行计算。本质上，我想弄清楚在上一次选举中投票的人口比例。我还想确定在前一次选举中投票率最高的县的名字，以及投票人数的百分比。

def highest_turnout(data) :
  class County :
    def__init__(self, init_name, init_population, init_voters) :
      self.name = init_name
      self.population = init_population
      self.voters = init_voters

 return # modify this as needed

# program evaluated using these objects 
allegheny = County("allegheny", 1000490, 645469)
philadelphia = County("philadelphia", 1134081, 539069)
montgomery = County("montgomery", 568952, 399591)
lancaster = County("lancaster", 345367, 230278)
delaware = County("delaware", 414031, 284538)
chester = County("chester", 319919, 230823)
bucks = County("bucks", 444149, 319816)
data = [allegheny, philadelphia, montgomery, lancaster, delaware, chester, bucks]  

result = highest_turnout(data) 
print(result) # prints the output of the function

^这是我上面的当前代码。我输入了数据，然后为县创建了一个类。我在这部分遇到了麻烦：

attributes

• Returning
• 查找投票率最高的县，即投票率最高的县，使用对象的人口和投票者组成的元组，其中包含投票率最高的县的名称和投票的人口百分比，按该顺序(百分比表示为0到1之间)

如有任何帮助/建议，将不胜感激。很高兴在评论中进一步澄清问题。非常感谢您，因为我是Python的新手:)。

Answer 1

你可以按投票率最高的人对数据进行排序，如：

turnout = sorted(data, key=lambda x: x.voters/x.population, reverse=True)

这将按递减顺序排序，这意味着投票率最高的县将是turnout[0].name。

产出：

chester

你想要的元组可能是：

highest = turnout[0]
print((highest.name, highest.voters/highest.population))

产出：

('chester', 0.7215045058280377)

Answer 2

我已经创建了一个程序，它看起来确实有点复杂，但一旦你阅读了它的全部，你可能能够理解它。这不是一个完全完成的程序，但它完成了工作。我到处添加了一些注释，以澄清一些代码。

#creating a dictionary to store the country name and its percentage
data = {}
#creating the class county
class County:
    def __init__(self,country,population,voters):
        self.country = country
        self.voters = voters
        self.population = population
        self.sorted_data = ""
        self.formatted_percentage = ""

    def update_data(self):
        #this method calculates the percentages to 2 decimal points and adds the country and percentage to the dictionary
        percentage = self.voters/self.population
        self.formatted_percentage = "{:.2f}".format(percentage)
        #self.formatted percentage basically takes the calculated percentage and changes it to 2 decimal places
        data.update({self.country: self.formatted_percentage})
        #this .update method allows for the country and formatted percentage to be stored in the data dictionary

    def sort_data(self):
        #this is where the actually sorting and printing takes place
        self.sorted_data = sorted(data.items(), key=lambda x: x[1], reverse=True)
        #inside the self.sorted data, we are sorting the list, through the sorted method
        # we then put in the parameters that we are using
        #we are using the items in the data dictionary, our key is lamba, 
        #and reverse basically means that the order will start from highest to lowest
        
        print(self.sorted_data)
        #we then print the actual data, if you do not like how it looks when printed, you can simply add a for loop 
        #to loop through the dictionary and print it instead.



allegheny = County("allegheny", 1000490, 645469)
philadelphia = County("philadelphia", 1134081, 539069)
montgomery = County("montgomery", 568952, 399591)
lancaster = County("lancaster", 345367, 230278)
delaware = County("delaware", 414031, 284538)
chester = County("chester", 319919, 230823)
bucks = County("bucks", 444149, 319816)

allegheny.update_data()
philadelphia.update_data()
montgomery.update_data()
lancaster.update_data()
delaware.update_data()
chester.update_data()
bucks.update_data()

allegheny.sort_data()