htmlから太文字（Bold）の単語だけを抽出する方法

# coding: UTF-8
import urllib3
from bs4 import BeautifulSoup
import sys
import requests

args = sys.argv

#アクセスするURL
url = args[1]

http = urllib3.PoolManager()
r = http.request('GET', url)

soup = BeautifulSoup(r.data,'html.parser')

bolds = soup.find_all("b")

for bold in bolds:
        print (bold.text)