def atoms(self):
"""A list of the atom types present amongst this atom's arguments.
"""
atom_list = []
for arg in self.args:
atom_list += arg.atoms()
return unique_list(atom_list + [type(self)])
def __add__(self, other):
if other == 0:
return self
elif not isinstance(other, XpressProblem):
raise NotImplementedError()
return XpressProblem(self.objective + other.objective,
unique_list(self.constraints + other.constraints))
def __add__(self, other):
if other == 0:
return self
elif not isinstance(other, Problem):
return NotImplemented
return Problem(self.objective + other.objective,
unique_list(self.constraints + other.constraints))
def atoms(self):
"""Returns all the atoms present in the args.
Returns
-------
list
"""
# Remove duplicates.
return unique_list(atom for arg in self.args for atom in arg.atoms())
def parameters(self):
"""Accessor method for parameters.
Returns
-------
list of :class:`~cvxpy.expressions.constants.parameter.Parameter`
A list of the parameters in the problem.
"""
params = self.objective.parameters()
for constr in self.constraints:
params += constr.parameters()
return unique_list(params)
def variables(self):
"""Accessor method for variables.
Returns
-------
list of :class:`~cvxpy.expressions.variable.Variable`
A list of the variables in the problem.
"""
vars_ = self.objective.variables()
for constr in self.constraints:
vars_ += constr.variables()
return unique_list(vars_)
def atoms(self):
"""Accessor method for atoms.
Returns
-------
list of :class:`~cvxpy.atoms.Atom`
A list of the atom types in the problem; note that this list
contains classes, not instances.
"""
atoms = self.objective.atoms()
for constr in self.constraints:
atoms += constr.atoms()
return unique_list(atoms)
def __sub__(self, other):
if not isinstance(other, Problem):
return NotImplemented
return Problem(self.objective - other.objective,
unique_list(self.constraints + other.constraints))
def constants(self):
"""Returns all the constants present in the arguments.
"""
return unique_list(
[const for arg in self.args for const in arg.constants()])
def parameters(self):
"""Returns all the parameters present in the arguments.
"""
return unique_list(
[param for arg in self.args for param in arg.parameters()])
def variables(self):
"""Returns all the variables present in the arguments.
"""
return unique_list(
[var for arg in self.args for var in arg.variables()])
def _parameters(self):
params = self.objective.parameters()
for constr in self.constraints:
params += constr.parameters()
return unique_list(params)
def _variables(self):
vars_ = self.objective.variables()
for constr in self.constraints:
vars_ += constr.variables()
return unique_list(vars_)
def variables(self):
"""Returns all the variables present in the arguments.
"""
# Remove duplicates.
return unique_list(var for arg in self.args for var in arg.variables())
