BeautifulSoup data-reactid Python

Question

尝试使用 data-reactid 标记在雅虎财经中搜索一个数字，但我得到了一个SyntaxError: keyword can't be an expression. 我的代码：

Walmart stock

source = requests.get('https://finance.yahoo.com/quote/WMT?p=WMT&.tsrc=fin-srch').text

soup = BeautifulSoup(source, 'lxml')

price = soup.find('span', data-reactid_='35')

print("Walmart stock: " + price.text)