Source code for ufl.protocols

# -*- coding: utf-8 -*-
# Copyright (C) 2008-2016 Martin Sandve Aln├Žs
#
# This file is part of UFL (https://www.fenicsproject.org)
#
# SPDX-License-Identifier:    LGPL-3.0-or-later


[docs]def id_or_none(obj): """Returns None if the object is None, obj.ufl_id() if available, or id(obj) if not. This allows external libraries to implement an alternative to id(obj) in the ufl_id() function, such that ufl can identify objects as the same without knowing about their types. """ if obj is None: return None elif hasattr(obj, 'ufl_id'): return obj.ufl_id() else: return id(obj)
[docs]def metadata_equal(a, b): return (sorted((k, id(v)) for k, v in list(a.items())) == sorted((k, id(v)) for k, v in list(b.items())))
[docs]def metadata_hashdata(md): return tuple(sorted((k, id(v)) for k, v in list(md.items())))