'浮动'的对象是不可迭代的错误

Question

我想获得一个变量，读取一个给定的时间长度（也是一个值列表）的负载值（在XML文档中给出）。 t的列表是从“开始”到“结束”的值，间隔为15分钟。基本上我想要的是我想要一个加载值打印其相应时间表的整个长度。所以如果它的时间列表是[0 15 30 45 60]，那么我希望它的加载值在列表中重复5次。我正在运行的xml文档和代码如下，并且我的potW任务中出现错误，说''float'对象不可迭代。“我知道这是很多，但有什么建议吗？

import xml.etree.ElementTree as ET 
import os 

class WaterModel: 

    def __init__(self,fn): 

     self.tree = ET.parse(fn) 
     self.root = self.tree.getroot() 

     self.title, self.start, self.end, self.load, self.duration, self.Type = [],[],[],[],[],[] 

     for child in self.root: 
      self.title.append(child.find('title').text) 

      sh = int(child.find('startHour').text) 
      sm = int(child.find('startMinute').text) 
      self.duration.append(int(child.find('duration').text)) 
      self.start.append(sh*60+sm) 
      self.end.append(self.start[-1] + self.duration[-1]) 
      self.Type.append(child.find('Type').text) 
      self.load.append(float(child.find('load').text)) 


    def Wp(self): 

     greyW = 0 
     for i in range(len(self.root)): 
      if self.Type[i] == 'greywater': 
       greyW += self.load[i]*self.duration[i] 

     t = range(self.start[i], self.end[i]+1, 15) 
     for i in range(len(self.root)): 
      for j in range(len(t)): 
       if self.Type[i] == 'potable': 
        potW = [a for a in self.load[j]] 

fn = 'SD2017NominalWaterUse.xml' 
a = WaterModel(fn) 
b = a.Wp() 
print(b) 

被读入上面的代码中的XML文件“SD2017NominalWaterUse.xml”：

<WaterNominalDay> 

<event> 
<title>Evening Washer</title> 
<Type>greywater</Type> 
<startHour>19</startHour> 
<startMinute>30</startMinute> 
<duration units = 'min'>270</duration> 
<load units = 'gal/min'>.051852</load> 
<comment> 
'' 
</comment> 
</event> 

<event> 
<title>Morning Cooking</title> 
<Type>potable</Type> 
<startHour>7</startHour> 
<startMinute>30</startMinute> 
<duration units = 'min'>180</duration> 
<load units = 'gal/min'>.003331</load> 
<comment> 
'5 lb water is .5995 gal' 
</comment> 
</event> 

<event> 
<title>Evening Cooking</title> 
<Type>potable</Type> 
<startHour>19</startHour> 
<startMinute>30</startMinute> 
<duration units = 'min'>180</duration> 
<load units = 'gal/min'>.003331</load> 
<comment> 
'5 lb water is .5995 gal' 
</comment> 
</event> 


<event> 
<title>Leaks</title> 
<Type>potable</Type> 
<startHour>0</startHour> 
<startMinute>00</startMinute> 
<duration units = 'min'>1440</duration> 
<load units = 'gal/min'>.006944</load> 
<comment> 
'' 
</comment> 
</event> 

</WaterNominalDay> 

Answer 1

self.load我的float秒的阵列，所以self.load[j]将是一个浮动，这是你想什么迭代;因此错误消息。