expression_list

(class from pyomo.core.kernel.expression)

class pyomo.core.kernel.expression.expression_list(*args, **kwds)

Bases: ListContainer

A list-style container for objects with category type IExpression

__init__(*args, **kwds)

Methods

`__init__`(args, *kwds)
`activate`([shallow])	Activate this container.
`append`(value)	S.append(value) -- append value to the end of the sequence
`child`(key)	Get the child object associated with a given storage key for this container.
`children`()	A generator over the children of this container.
`clear`()
`clone`()	Returns a copy of this object with the parent pointer set to `None`.
`components`([active])	Generates an efficient traversal of all components stored under this container.
`count`(value)
`deactivate`([shallow])	Deactivate this container.
`extend`(values)	S.extend(iterable) -- extend sequence by appending elements from the iterable
`getname`([fully_qualified, name_buffer, ...])	Dynamically generates a name for this object.
`index`(value, [start, [stop]])	Raises ValueError if the value is not present.
`insert`(i, item)	S.insert(index, object) -- insert object before index
`pop`([index])	Raise IndexError if list is empty or index is out of range.
`remove`(value)	S.remove(value) -- remove first occurrence of value.
`reverse`()	S.reverse() -- reverse IN PLACE

Attributes

`active`	The active status of this object.
`ctype`	The object's category type.
`local_name`	The object's local name within the context of its parent.
`name`	The object's fully qualified name.
`parent`	The object's parent (possibly None).
`storage_key`	The object's storage key within its parent

Member Documentation

activate(shallow=True): Activate this container.

append(value): S.append(value) – append value to the end of the sequence

child(key)

Get the child object associated with a given storage key for this container.

Raises:: KeyError – if the argument is not a storage key for any children of this container

children(): A generator over the children of this container.

clear() → None -- remove all items from S

clone()

Returns a copy of this object with the parent pointer set to None.

A clone is almost equivalent to deepcopy except that any categorized objects encountered that are not descendents of this object will reference the same object on the clone.

components(active=True)

Generates an efficient traversal of all components stored under this container. Components are categorized objects that are either (1) not containers, or (2) are heterogeneous containers.

Parameters:: active (True/None) – Controls whether or not to filter the iteration to include only the active part of the storage tree. The default is True. Setting this keyword to None causes the active status of objects to be ignored.
Returns:: iterator of components in the storage tree

count(value) → integer -- return number of occurrences of value

deactivate(shallow=True): Deactivate this container.

extend(values): S.extend(iterable) – extend sequence by appending elements from the iterable

getname(fully_qualified=False, name_buffer={}, convert=<class 'str'>, relative_to=None)

Dynamically generates a name for this object.

Parameters:

fully_qualified (bool) – Generate a full name by iterating through all ancestor containers. Default is False.
convert (function) – A function that converts a storage key into a string representation. Default is the built-in function str.
relative_to (object) – When generating a fully qualified name, generate the name relative to this block.

Returns:

If a parent exists, this method returns a string representing the name of the object in the context of its parent; otherwise (if no parent exists), this method returns None.

index(value[, start[, stop]]) → integer -- return first index of value.: Raises ValueError if the value is not present.

insert(i, item): S.insert(index, object) – insert object before index

pop([index]) → item -- remove and return item at index (default last).: Raise IndexError if list is empty or index is out of range.

remove(value): S.remove(value) – remove first occurrence of value. Raise ValueError if the value is not present.

reverse(): S.reverse() – reverse IN PLACE

property active: The active status of this object.

property ctype: The object’s category type.

property local_name: The object’s local name within the context of its parent. Alias for obj.getname(fully_qualified=False).

property name: The object’s fully qualified name. Alias for obj.getname(fully_qualified=True).

property parent: The object’s parent (possibly None).

property storage_key: The object’s storage key within its parent