code: def escape_b(s, quote=True):
      '''Replace special characters "&", "<" and ">" to HTML-safe sequences.
      If the optional flag quote is true, the quotation mark character (")
      is also translated.'''
      s = s.replace(b"&", b"&amp;") # Must be done first!
      s = s.replace(b"<", b"&lt;")
      s = s.replace(b">", b"&gt;")
      if quote:
          s = s.replace(b'"', b"&quot;")
      return f escape_b(s, quote=True):
      '''Replace special characters "&", "<" and ">" to HTML-safe sequences.
      If the optional flag quote is true, the quotation mark character (")
      is also translated.'''
      s = s.replace(b"&", b"&amp;") # Must be done first!
      s = s.replace(b"<", b"&lt;")
      s = s.replace(b">", b"&gt;")
      if quote:
          s = s.replace(b'"', b"&quot;")
      return s
docs: Replace special characters "&", "<" and ">" to HTML-safe sequences.
      If the optional flag quote is true, the quotation mark character (")
      is also translated.