label_tag = row.find(class_='Label')
 print(label_tag)

<a class="Label" href="_link_">_text_</a>

<class 'bs4.element.Tag'>

tag_link = label_tag['href']
print(tag_link)

TypeError: 'NoneType' object is not subscriptable

import bs4
text = '''<a class="Label" href="_link_">_text_</a>'''
soup = bs4.BeautifulSoup(text)
link = soup.find("a",{"class":"Label"})
print (link["href"])

_link_

if tag_link = label_tag.get('href'):
    print(tag_link)
else:
    print("there is no class of 'Label' or no attribute of 'href'! ")