Detect whether charset exists in python

Is it possible to check in Python whether a given charset exists/is installed. For example:
check('iso-8859-1') -> True
check('bla') -> False

From stackoverflow

• You can use the lookup() function in the codecs module. It throws an exception if a codec does not exist:

  import codecs
  def exists_encoding(enc):
      try:
          codecs.lookup(enc)
      except LookupError:
          return False
      return True
  exists_encoding('latin1')