/usr/lib/python3/dist-packages/ufl/exprcontainers.py is in python3-ufl 2016.2.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 | # -*- coding: utf-8 -*-
"""This module defines special types for representing mapping of expressions to expressions."""
# Copyright (C) 2014 Martin Sandve Alnæs
#
# This file is part of UFL.
#
# UFL is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# UFL is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with UFL. If not, see <http://www.gnu.org/licenses/>.
from ufl.utils.py23 import as_native_str
from ufl.log import error
from ufl.core.expr import Expr
from ufl.core.operator import Operator
from ufl.core.ufl_type import ufl_type
# --- Non-tensor types ---
@ufl_type(num_ops="varying")
class ExprList(Operator):
"List of Expr objects. For internal use, never to be created by end users."
__slots__ = ()
def __init__(self, *operands):
Operator.__init__(self, operands)
if not all(isinstance(i, Expr) for i in operands):
error("Expecting Expr in ExprList.")
def __getitem__(self, i):
return self.ufl_operands[i]
def __len__(self):
return len(self.ufl_operands)
def __iter__(self):
return iter(self.ufl_operands)
def __str__(self):
return "ExprList(*(%s,))" % ", ".join(str(i) for i in self.ufl_operands)
def __repr__(self):
r = "ExprList(*%s)" % repr(self.ufl_operands)
return as_native_str(r)
@property
def ufl_shape(self):
error("A non-tensor type has no ufl_shape.")
@property
def ufl_free_indices(self):
error("A non-tensor type has no ufl_free_indices.")
def free_indices(self):
error("A non-tensor type has no free_indices.")
@property
def ufl_index_dimensions(self):
error("A non-tensor type has no ufl_index_dimensions.")
def index_dimensions(self):
error("A non-tensor type has no index_dimensions.")
@ufl_type(num_ops="varying")
class ExprMapping(Operator):
"Mapping of Expr objects. For internal use, never to be created by end users."
__slots__ = ()
def __init__(self, *operands):
Operator.__init__(self, operands)
if not all(isinstance(e, Expr) for e in operands):
error("Expecting Expr in ExprMapping.")
def ufl_domains(self):
# Because this type can act like a terminal if it has no
# operands, we need to override some recursive operations
if self.ufl_operands:
return Operator.ufl_domains()
else:
return []
# def __getitem__(self, key):
# return self.ufl_operands[key]
# def __len__(self):
# return len(self.ufl_operands) // 2
# def __iter__(self):
# return iter(self.ufl_operands[::2])
def __str__(self):
return "ExprMapping(*%s)" % repr(self.ufl_operands)
def __repr__(self):
r = "ExprMapping(*%s)" % repr(self.ufl_operands)
return as_native_str(r)
@property
def ufl_shape(self):
error("A non-tensor type has no ufl_shape.")
@property
def ufl_free_indices(self):
error("A non-tensor type has no ufl_free_indices.")
def free_indices(self):
error("A non-tensor type has no free_indices.")
@property
def ufl_index_dimensions(self):
error("A non-tensor type has no ufl_index_dimensions.")
def index_dimensions(self):
error("A non-tensor type has no index_dimensions.")
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