title: NameError: name 'bs4' is not defined
body: <p>When I run the code:</p>
  
  <pre><code>import requests
  from bs4 import BeautifulSoup
  import urllib
  
  response = urllib.urlopen('file:///Users/kerss/diet/sesame_seeds.html')
  html = response.read()
  soup = bs4.BeautifulSoup(html, 'html.parser')
  
  span = soup.find("span", id="NUTRIENT_0")
  print(span.text)
  </code></pre>
  
  <p>I get the following error:</p>
  
  <pre><code>  File "c:\users\kerss\diet\scrape.py", line 8, in &lt;module&gt;
      soup = bs4.BeautifulSoup(html, 'html.parser')
  NameError: name 'bs4' is not defined
  </code></pre>
  
  <p>but bs4 is defined? or not?</p>