old_contents: import jwt
  import hmac
  import hashlib
  import base64
  
  
  def b64_encode(s):
      return base64.urlsafe_b64encode(s).strip(b'=')
  
  def sign(api_secret, feed_id):
      '''
      Base64 encoded sha1 signature
  
      :param api_secret: the api secret
      :param feed_id: the feed_id to sign (commonly a feed id such as user1)
  
      **Example**::
          signature = sign('secret', 'user1')
  
      '''
      hashed_secret = hashlib.sha1((api_secret).encode('utf-8')).digest()
      signed = hmac.new(
          hashed_secret, msg=feed_id.encode('utf8'), digestmod=hashlib.sha1)
      digest = signed.digest()
      urlsafe_digest = b64_encode(digest)
      token = urlsafe_digest.decode('ascii')
      return token
  
  
new_contents: import hmac
  import hashlib
  import base64
  
  
  def b64_encode(s):
      return base64.urlsafe_b64encode(s).strip(b'=')
  
  def sign(api_secret, feed_id):
      '''
      Base64 encoded sha1 signature
  
      :param api_secret: the api secret
      :param feed_id: the feed_id to sign (commonly a feed id such as user1)
  
      **Example**::
          signature = sign('secret', 'user1')
  
      '''
      hashed_secret = hashlib.sha1((api_secret).encode('utf-8')).digest()
      signed = hmac.new(
          hashed_secret, msg=feed_id.encode('utf8'), digestmod=hashlib.sha1)
      digest = signed.digest()
      urlsafe_digest = b64_encode(digest)
      token = urlsafe_digest.decode('ascii')
      return token
  
  
subject: Remove unused import 'jwt'