从表格的行和列中查找文本

我在如下所示的html中有一个表格，例如，我需要提取“捕捉时间”列下的“结束捕捉”值，该值为03-Sep-20 02:00:01

<table border="0" width="600" class="tdiff" summary="for snapshot information">
<tr><th class="awrnobg" scope="col"></th><th class="awrbg" scope="col">Snap Id</th><th class="awrbg" scope="col">Snap Time</th><th class="awrbg" scope="col">Sessions</th><th class="awrbg" scope="col">Cursors/Session</th><th class="awrbg" scope="col">Instances</th></tr>
<tr><td scope="row" class='awrnc'>Begin Snap:</td><td align="right" class='awrnc'>121525</td><td align="center" class='awrnc'>03-Sep-20 01:30:07</td><td align="right" class='awrnc'>167</td><td align="right" class='awrnc'>     10.4</td><td align="right" class='awrnc'>6</td></tr>
<tr><td scope="row" class='awrc'>End Snap:</td><td align="right" class='awrc'>121526</td><td align="center" class='awrc'>03-Sep-20 02:00:01</td><td align="right" class='awrc'>174</td><td align="right" class='awrc'>     11.2</td><td align="right" class='awrc'>6</td></tr>
<tr><td scope="row" class='awrnc'>Elapsed:</td><td class='awrnc'>&#160;</td><td align="center" class='awrnc'>              29.90 (mins)</td><td class='awrnc'>&#160;</td><td class='awrnc'>&#160;</td><td class='awrnc'>&#160;</td></tr>
<tr><td scope="row" class='awrc'>DB Time:</td><td class='awrc'>&#160;</td><td align="center" class='awrc'>              67.15 (mins)</td><td class='awrc'>&#160;</td><td class='awrc'>&#160;</td><td class='awrc'>&#160;</td></tr>
</table>

要求的值以以下格式请求：columnname_row name：

Snap Id_Begin Snap
Snap Id_End Snap
Snap Time_Begin Snap
Snap Time_End Snap

它进入一个名为namesplit的变量。我想先拉列号和行号，然后打印所需的值：

dbii = soup.find_all("table", attrs={"summary": "for snapshot information"})

for tables in dbii:
    vcols=tables.findChildren('th')
    #print(type(rows))  #bs4.element.ResultSet
    #print(rows)
    #print(ti)
    ii=0
    for value ivcols:
        #print(value.strip)
        #print(value.string)
        #print(type(value))     # bs4.element.Tag
        if(value.text!=None and value.text.lower() == namesplit[0].lower()):         # this matches the column name string
            print("match")
            col_no=ii
            table_no=ti
        else:
            ii+=1
    ti+=1

    print(table_no,col_no,namesplit[1]) # correctly gives table 0, column as 1 or 2

    print("abc")
    #print(dbii[table_no])
    #print(type(dbii[table_no]))
    # Find Row number.
    drow=dbii[table_no].find_all(scope = 'row' )
    j=0
    print(row_no)
    for value in drow:
        #print("row",j,"asdasdsad:",value,value.text)
        if(value.text!=None and namesplit[1].lower() in value.text.lower() ):
            row_no=j

        j+=1
    print(row_no)               # correctly picks the td row as 0(for begin) or 1 (for end) 

    # We have Table no , column number, Row_no  .. get the corresponding value.
    fvalue=dbii[table_no].find_all(tr)[row_no] ## this doesnt work. as its a tag.
    print(type(fvalue)) ## tag ?? 
    print(fvalue)