问对于循环故障，只在列表的第一个实例中运行。

EN

3.49
0.77
4.88
<span style="color:#aa0000;">15.71</span>
<span style="color:#aa0000;">8.07</span>
2.72
None
None
<span style="color:#aa0000;">10.19</span>
None
<span style="color:#aa0000;">7.21</span>
4.34
1.54
<span style="color:#aa0000;">10.75</span>

import time
import urllib.request
import urllib.parse
import pandas as pd

sp500short = ['a', 'aa', 'aapl', 'abbv', 'abc', 'abt', 'ace', 'aci', 'acn', 'act', 'adbe', 'adi', 'adm', 'adp']
#stock = 'a'

data = []

color_1 = '<span style="color:#008800;">'
color_2 = '<span style="color:#aa0000;">'
color_list = [color_1, color_2]
color_close = '</span>'


def finvizPBStats(stock):

    pbr = 0

    try:

        sourceCode = urllib.request.urlopen('http://finviz.com/quote.ashx?t='+stock).read()
        sourceCodeString = sourceCode.decode()
        pbr = sourceCodeString.split('P/B</td><td width="8%" class="snapshot-td2" align="left"><b>')[1].split('</b></td>')[0]

        for color in color_list:
            if color not in pbr:
                return pbr
            elif color in pbr:
                pbr = pbr.split(color)[1].split(color_close)[0]
                pbr = float(pbr)
                return pbr


    except Exception as e:
        if Exception:
            pass 

for stock in sp500short:
    print(finvizPBStats(stock))