engforge.attr_signals.Signal

class Signal(name, default, validator, repr, cmp, hash, init, inherited, metadata=None, type=None, converter=None, kw_only=False, eq=None, eq_key=None, order=None, order_key=None, on_setattr=None, alias=None)

Bases: ATTR_BASE

A base class that handles initalization in the attrs meta class scheme by ultimately createing a SignalInstance

Methods

class_validate	validates onetime A method to validate the kwargs passed to the define method
collect_attr_inst	collects all the attribute instances for a system
collect_cls	collects all the attributes for a system
configure_for_system	add the config class, and perform checks with `class_validate) :returns: [optional] a dictionary of options to be used in the make_attribute method
configure_instance	validates the instance given attr's init routine
create_instance	Create an instance of the instance_class
define	taking a component or system class as possible input valid input is later validated as an instance of that class or subclass
define_validate	A method to validate the kwargs passed to the define method
evolve	Copy self and apply changes.
from_counting_attr
handle_instance	handles the instance, override as you wish
make_attribute	makes an attrs.Attribute for the class
make_factory
process_combos
subclasses	return all subclasses of components, including their subclasses :type out: :param out: out is to pass when the middle of a recursive operation, do not use it!
unpack_atrs

Attributes

name
default
validator
repr
eq
eq_key
order
order_key
hash
init
metadata
type
converter
kw_only
inherited
on_setattr
alias
attr_prefix
default_options
none_ok
template_class
mode
target
source
config_cls
active
combos

classmethod class_validate(instance, **kwargs)

validates onetime A method to validate the kwargs passed to the define method

classmethod collect_attr_inst(system, handle_inst=True)

collects all the attribute instances for a system

Return type:

dict

classmethod collect_cls(system)

collects all the attributes for a system

Return type:

dict

classmethod configure_for_system(name, config_class, cb=None, **kwargs)

add the config class, and perform checks with `class_validate) :returns: [optional] a dictionary of options to be used in the make_attribute method

classmethod configure_instance(instance, attribute, value)

validates the instance given attr’s init routine

classmethod create_instance(instance)

Create an instance of the instance_class

Return type:

AttributeInstance

Parameters:

instance (Configuration)

classmethod define(target, source, mode='pre', **kw)

taking a component or system class as possible input valid input is later validated as an instance of that class or subclass

Parameters:

• target (str)

• source (str)

classmethod define_validate(**kwargs)

A method to validate the kwargs passed to the define method

evolve(**changes)

Copy self and apply changes.

This works similarly to attrs.evolve but that function does not work with Attribute.

It is mainly meant to be used for transform-fields.

Added in version 20.3.0.

classmethod handle_instance(canidate)

handles the instance, override as you wish

instance_class

alias of SignalInstance

classmethod make_attribute(name, comp_class, **kwargs)

makes an attrs.Attribute for the class

classmethod subclasses(out=None)

return all subclasses of components, including their subclasses :type out: :param out: out is to pass when the middle of a recursive operation, do not use it!