code: def json(a):
      
      json_str = json_dumps(a)
  
      # Escape all the XML/HTML special characters.
      escapes = ['<', '>', '&']
      for c in escapes:
          json_str = json_str.replace(c, r'\u%04x' % ord(c))
  
      # now it's safe to use mark_safe
      return mark_safe(json_str)
docs: Output the json encoding of its argument.
  
      This will escape all the HTML/XML special characters with their unicode
      escapes, so it is safe to be output anywhere except for inside a tag
      attribute.
  
      If the output needs to be put in an attribute, entitize the output of this
      filter.