python将excel XML读取到DataFrame

Question

我正在从excel XML文件中读取20000 x 16的表格。我在GitHub上使用此功能，但它的工作原理却很慢。有什么方法可以加快速度吗？

import pandas
from bs4 import BeautifulSoup

source = 'Positions_20171110.xls'

def read_excel_xml(path):
""" Converts Excel XML to a [[[list]]] """
    file = open(path).read()
    soup = BeautifulSoup(file,'xml')
    workbook = []
    for sheet in soup.findAll('Worksheet'): 
        sheet_as_list = []
        for row in sheet.findAll('Row'):
            row_as_list = []
            for cell in row.findAll('Cell'):
                row_as_list.append(cell.Data.text)
            sheet_as_list.append(row_as_list)
        workbook.append(sheet_as_list)
    return workbook


data = read_excel_xml(source)
df = pd.DataFrame(data[0][1:],columns = data[0][0])