Function flattenlist

recipes/Python/577250_Flatten_a_list_/recipe-577250.py:1–23

(L)

    def flattenlist(L):
        import types
        WhiteTypes = ('StringType', 'UnicodeType', 'StringTypes', 'ListType',
                  'ObjectType', 'TupleType')
        BlackTypes= tuple( [getattr(types, x) for x in dir(types)
                      if not x.startswith('_')
                      and x not in whites] )

        tmp = []
        def core(L):
            if  not hasattr(L,'__iter__'):
                return [L]
            else :
                for i in L:
                    if isinstance(i,BlackTypes):
                        tmp.append(i)
                        continue
                    if type(i) == type(str()):
                        tmp.append(i)
                    else:
                        core(i)
            return tmp
        return core(L)