===========================
Generate Unique Identifiers
===========================

$Id$

  >>> from cybertools.util.uid import generateUid

  >>> generateUid(seed=42)
  '5MdsLTYmogAeWfbrLDBY8l'

  >>> generateUid(seed=42)
  '5MdsLTYmogAeWfbrLDBY8l'

  >>> def checkIt(id):
  ...     return id != '5MdsLTYmogAeWfbrLDBY8l'

  >>> generateUid(check=checkIt, seed=42)
  '15pahuNd5rxoekvZSMGAl1'

  >>> generateUid(lowerCaseOnly=True, seed=42)
  'b8lhps8li07acdu7i0w01b0rh'

  >>> generateUid()
  '...'

  >>> generateUid(base=64, seed=42)
  '2ZRA3X1CsqQhO0cn-zInCt'

  >>> generateUid(base=99, seed=42)
  Traceback (most recent call last):
  ...
  ValueError: The base argument may not exceed 64, but is 99.