code: def escape(s, quote=True):
      """
      Replace special characters "&", "<" and ">" to HTML-safe sequences.
      If the optional flag quote is true (the default), the quotation mark
      characters, both double quote (") and single quote (') characters are also
      translated.
      """
      s = s.replace("&", "&amp;")  # Must be done first!
      s = s.replace("<", "&lt;")
      s = s.replace(">", "&gt;")
      if quote:
          s = s.replace('"', "&quot;")
          s = s.replace("'", "&#x27;")
      return s
  
imports: import re
  from html.entities import html5
label_desc: Use image node_id 1 for calling a global function with example usage: escape(s, quote) and returns: s