Python Beauty Soup-XML解析-属性错误异常(处理空值)

Python Beauty Soup-XML解析-属性错误异常(处理空值),python,pandas,beautifulsoup,xml-parsing,Python,Pandas,Beautifulsoup,Xml Parsing,我有以下代码: from bs4 import BeautifulSoup import pandas as pd import sqlite3 conn = sqlite3.connect('test.db') inputFile = open("test.xml","r") data = BeautifulSoup(inputFile,'xml') stop_points = data.find_all('Location') l = [] df

我有以下代码:

from bs4 import BeautifulSoup
import pandas as pd
import sqlite3
conn = sqlite3.connect('test.db')

inputFile = open("test.xml","r")

data = BeautifulSoup(inputFile,'xml')
stop_points = data.find_all('Location')

l = []
df = pd.DataFrame(columns=['Id','One','Two','Three','Four','Five'])
pos= 0
for stop in stop_points:
    l.append(stop.get('id'))
    l.append(stop.find('One').text)
    l.append(stop.find('Two').text)
    l.append(stop.find('Three').text)
    l.append(stop.find('Four').text)
    l.append(stop.find('Five').text)
    df.loc[pos] = l
    l = []
    pos+=1
print(df)

df.to_sql('Location',conn,if_exists='replace',index=False)
但是,在某些情况下,“Location”并没有包含所有元素(“一”、“二”、“三”、“四”或“五”)。当脚本迭代到不包含所有这些元素的位置时,将引发属性错误异常:

Exception has occurred: AttributeError
'NoneType' object has no attribute 'text'
因此,我认为在尝试将“.text”附加到列表之前需要进行状态检查。然而,我并不想添加五个“如果”语句,因为这不是很优雅

以下是XML文件的示例,以供参考:

 <Location id="00000">
              <Translation>
                <One>111111</One>
                <Two>222222</Two>
                <Four>-5.0</Four>
                <Five>50.0</Five>
              </Translation>
            </Location>
 <Location id="11111">
              <Translation>
                <One>111111</One>
                <Two>222222</Two>
                <Three>-5.0</Three>
                <Five>50.0</Five>
              </Translation>
            </Location>
 <Location id="22222">
              <Translation>
                <One>111111</One>
                <Two>222222</Two>
              </Translation>
            </Location>

111111
222222
-5.0
50
111111
222222
-5.0
50
111111
222222

假设您的html如下所示:

locations = """
<locations>
<Location id="00000">
              <Translation>
                <Easting>111111</Easting>
                <Northing>222222</Northing>
                <Longitude>-5.0</Longitude>
                <Latitude>50.0</Latitude>
              </Translation>
            </Location>
<Location id="00001">
              <Translation>
                <Easting>4444</Easting>
                <Northing>5555</Northing>
                <Longitude>-6.0</Longitude>
                <Latitude>70.0</Latitude>
              </Translation>
            </Location>
</locations>    
"""
stop_points = data.select('location')
columns=['Id','One','Two','Three','Four']
rows = []

for s in stop_points:        
    row = []
    row.append(s['id'])
    row.extend(s.text.strip().split('\n'))
    rows.append(row)
pd.DataFrame(rows,columns=columns)
应输出:

     Id     One     Two     Three   Four
0   00000   111111  222222  -5.0    50.0
1   00001   4444    5555    -6.0    70.0

迭代遍历参数列表,并将单个
if
语句置于状态。您能否在
inputFile
中发布xml的代表性示例?另外,由于您处理的是xml,您可能希望使用像lxml这样的xml解析器进行解析,并使用xpath。示例xml不包含任何
、、
。这是故意的吗?对不起,我没有发现我明显的错误。现在我已经更正了XML示例,以便更好地说明用例。