# coding: utf-8
"""
Mixin classes providing common functionality.
"""
__all__ = [
"CopyMixin", "AuxDataMixin", "TagMixin", "DataSourceMixin", "SelectionMixin", "LabelMixin",
"ColorMixin", "CopySpec",
]
import re
import copy
import collections
import six
from order.util import (
ROOT_DEFAULT, typed, make_list, multi_match, join_root_selection, join_numexpr_selection,
to_root_latex, args_to_kwargs, DotAccessProxy,
)
[docs]class CopySpec(object):
"""
Class holding attribute copy specifications. Instances of this class are used in
:py:class:`CopyMixin` to optionally describe the copy behavior individually per attribute. At
the moment, copy specs only need to be created in case attributes should not be copied but
carried over the the copied objects as a reference.
**Arguments**
*dst* is the destination attribute name, *src* is the source attribute. When *ref* is *True*,
the attribute is not copied but a reference is passed to the newly created instance. Internally,
this is done be temporarily setting the attribute to a *ref_placeholder* value, performing the
deep copy, and then (re)setting the attribute to the original object.
When *skip* (*skip_shallow*) is *True*, the attribute is not copied when the source objects is
copied through :py:meth:`CopyMixin.copy` (:py:meth:`CopyMixin.copy_shallow`). When skipped,
the attribute of the copied object will be *skip_value*.
**Members**
.. py:attribute:: dst
type: string
The destination attribute.
.. py:attribute:: src
type: string
The source attribute.
.. py:attribute:: ref
type: bool
Whether or not the attribute should be passed as a reference instead of being copied.
.. py:attribute:: ref_placeholder
type: any
Placeholder value for attributes carried over as a reference that is used during the copying
process.
.. py:attribute:: skip
type: bool
Whether or not the attribute is skipped when copied with :py:meth:`CopyMixin.copy`.
.. py:attribute:: skip_shallow
type: bool
Whether or not the attribute is skipped when copyied with :py:meth:`CopyMixin.copy_shallow`.
.. py:attribute:: skip_value
type: any
Value to be used for attributes that are skipped in the copy process.
"""
@classmethod
def new(cls, obj):
if isinstance(obj, cls):
return copy.copy(obj)
if isinstance(obj, six.string_types):
return cls(dst=obj)
if isinstance(obj, (tuple, list)) and len(obj) == 2:
return cls(src=obj[0], dst=obj[1])
if isinstance(obj, dict):
kwargs = {}
kwargs["dst"] = obj.get("dst", obj.get("attr"))
if kwargs["dst"] is None:
msg = "cannot create {} from dict, a 'dst' or 'attr' field is required, got '{}'"
raise ValueError(msg.format(cls.__name__, obj))
kwargs["src"] = obj.get("src", obj.get("attr"))
if "ref" in obj:
kwargs["ref"] = obj.get("ref", False)
if "ref_placeholder" in obj:
kwargs["ref_placeholder"] = obj.get("ref_placeholder", None)
if "skip" in obj:
kwargs["skip"] = obj.get("skip", False)
if "skip_shallow" in obj:
kwargs["skip_shallow"] = obj.get("skip_shallow", False)
if "skip_value" in obj:
kwargs["skip_value"] = obj.get("skip_value")
return cls(**kwargs)
raise TypeError("cannot create {} from object '{}'".format(cls.__name__, obj))
def __init__(
self,
dst,
src=None,
ref=False,
ref_placeholder=None,
skip=False,
skip_shallow=False,
skip_value=None,
):
super(CopySpec, self).__init__()
# store attributes
self.dst = dst
self.src = src or dst
self.ref = ref
self.ref_placeholder = ref_placeholder
self.skip = skip
self.skip_shallow = skip_shallow
self.skip_value = skip_value
def __eq__(self, spec):
"""
To instances are equal when their *dst* attributes are equal.
"""
if isinstance(spec, six.string_types):
return self.dst == spec
if isinstance(spec, self.__class__):
return self.dst == spec.dst
return False
def __hash__(self):
"""
The *dst* attribute defines the hash.
"""
return hash(self.dst)
[docs]class CopyMixin(object):
"""
Mixin-class that adds copy features to inheriting classes.
Inheriting classes can define a *copy_specs* class member, which is supposed to be a list
containing specifications per attribute to be copied. See :py:class:`CopySpec` and
:py:meth:`CopySpec.new` for information about possible copy specifications.
.. note::
At the moment, custom specs are only required for attributes that should not be copied but
either carried over to the copied instance as a reference, or skipped in case only a shallow
copy is requested via :py:meth:`copy_shallow`.
**Example**
.. code-block:: python
import order as od
some_object = object()
class MyClass(od.CopyMixin):
copy_specs = [
{"attr": "obj", "ref": True},
{"attr": "complex_obj", "ref": True, "skip_shallow": True},
]
def __init__(self, name, obj, complex_obj=None):
super(MyClass, self).__init__()
self.name = name
self.obj = obj
self.complex_obj = complex_obj
a = MyClass("foo", some_object, "some_other_complex_object")
a.name
# -> "foo"
# normal copy
b = a.copy()
b.name
# -> "foo"
b.obj is a.obj
# -> True
b.complex_obj is a.complext_obj
# -> True
# shallow copy (skipping certain attributes)
c = a.copy_shallow()
c.name
# -> "foo"
c.obj is a.obj
# -> True
c.complex_obj is None # note the None here
# -> True
**Members**
.. py:classattribute:: copy_specs
type: list
List of copy specifications per attribute.
"""
class Deferred(object):
def __init__(self, func):
self.func = func
def __call__(self, *args, **kwargs):
return self.func(*args, **kwargs)
copy_spec = []
@classmethod
def _create_specs(cls, specs):
# ensure that specs contain CopySpec objects
# also remove duplicates, priotize last occurances
_specs = []
for spec in specs[::-1]:
spec = CopySpec.new(spec.__dict__ if isinstance(spec, CopySpec) else spec)
if spec not in _specs:
_specs.append(spec)
return _specs[::-1]
[docs] def copy(self, *args, **kwargs):
r"""copy(*args, **kwargs, _specs=None, _skip=None)
Creates a copy of this instance and returns it. All *args* and *kwargs* are converted to
named arguments (based on the *init* signature) and set as attributes of the created copy.
Additional specifications per attribute are taken from :py:attr:`copy_specs` or *_specs* if
set. *_skip* can be a sequence of source attribute names that should be skipped.
"""
# get CopySpec objects
specs = self._create_specs(kwargs.pop("_specs", None) or self.copy_specs)
# apply additional skips
for src in (kwargs.pop("_skip", None) or []):
for spec in specs:
if spec.src == src:
spec.skip = True
break
# attributes that are skipped or carried over as a reference should be set to a placeholder
# first and reset later on
skips = {}
refs = {}
for spec in specs:
if spec.skip:
skip_value = (
spec.skip_value(self)
if isinstance(spec.skip_value, self.Deferred) else
spec.skip_value
)
skips[spec] = getattr(self, spec.src)
setattr(self, spec.src, skip_value)
elif spec.ref:
ref_placeholder = (
spec.ref_placeholder(self)
if isinstance(spec.ref_placeholder, self.Deferred) else
spec.ref_placeholder
)
refs[spec] = getattr(self, spec.src)
setattr(self, spec.src, ref_placeholder)
# perform the deep copy operation
inst = copy.deepcopy(self)
# reset skipped attributes
for spec, obj in skips.items():
# reset the old value of this instance
setattr(self, spec.src, obj)
# reset references
for spec, obj in refs.items():
# reset the old value of this instance
setattr(self, spec.src, obj)
# add a reference to the copied instance
setattr(inst, spec.dst, obj)
# unite args and kwargs
kwargs.update(args_to_kwargs(self.__class__.__init__ if six.PY2 else self.__class__, args))
# set additional attributes
for attr, obj in kwargs.items():
setattr(inst, attr, obj)
return inst
[docs] def copy_shallow(self, *args, **kwargs):
r"""copy_shallow(*args, **kwargs, _specs=None, _skip=None)
Just like :py:meth:`copy`, creates a copy of this instance and returns it, however with all
attributes that were declared as *skip_shallow* skipped (see :py:class:`CopySpec`).
"""
# get CopySpec objects
specs = self._create_specs(kwargs.pop("_specs", None) or self.copy_specs)
# use skip_shallow flags
for spec in specs:
spec.skip |= spec.skip_shallow
# use copy implementation
kwargs["_specs"] = specs
return self.copy(*args, **kwargs)
[docs]class AuxDataMixin(object):
"""
Mixin-class that provides storage of auxiliary data via a simple interface.
**Arguments**
*aux* can be a dictionary or a list of 2-tuples to initialize the auxiliary data container.
For convenient access via attributes, each instance of this mixin-class has a proxy object
:py:attr:`x` which can be used to obtain auxiliary information. See example below.
**Example**
.. code-block:: python
import order as od
class MyClass(od.AuxDataMixin):
pass
c = MyClass(aux={"foo": "bar"})
# "foo" in c.aux
# same as c.has_aux("foo")
# -> True
c.set_aux("test", "some_value")
c.get_aux("test")
# -> "some_value"
c.get_aux("notthere")
# -> KeyError
c.get_aux("notthere", default=123)
# -> 123
c.x.test
# -> "some_value"
c.x("test") # same as c.get_aux
# -> "some_value"
c.x.notthere
# -> AttributeError
**Members**
.. py:attribute:: aux
type: OrderedDict
The dictionary of auxiliary data.
.. py:attribute:: x
type: :py:class:`DotAccessProxy` (read-only)
An object that provides simple attribute access to auxiliary data.
"""
_no_default = object()
_no_value = object()
copy_specs = []
def __init__(self, aux=None):
super(AuxDataMixin, self).__init__()
# instance members
self._aux = collections.OrderedDict()
# set initial values
if aux is not None:
for key, data in collections.OrderedDict(aux).items():
self.set_aux(key, data)
# save a dot access proxy for easy access of values through the x property
self._x = DotAccessProxy(self.get_aux, self.set_aux)
@typed
def aux(self, aux):
# aux parser
try:
aux = collections.OrderedDict(aux)
except:
raise TypeError("invalid aux type: {}".format(aux))
return aux
@property
def x(self):
return self._x
[docs] def set_aux(self, key, value):
"""
Stores auxiliary *value* for a specific *key*. Returns *value*.
"""
self.aux[key] = value
return value
[docs] def has_aux(self, key):
"""
Returns *True* when an auxiliary data entry for a specific *key* exists, *False* otherwise.
"""
return key in self.aux
[docs] def get_aux(self, key, default=_no_default):
""" get_aux(key, [default])
Returns the auxiliary data for a specific *key*. If a *default* is given, it is returned in
case *key* is not found.
"""
if default != self._no_default:
return self.aux.get(key, default)
return self.aux[key]
[docs] def remove_aux(self, key, silent=False):
"""
Removes the auxiliary data for a specific *key*. Unless *silent* is *True*, an exception is
raised if the *key* to remove is not found.
"""
if key in self.aux or not silent:
del self.aux[key]
[docs] def clear_aux(self):
"""
Clears the auxiliary data container.
"""
self.aux.clear()
[docs]class TagMixin(object):
"""
Mixin-class that allows inheriting objects to be attribute one or more *tags*. See the example
below for more infos.
**Arguments**
*tags* initializes the internal set of stored tags.
**Example**
.. code-block:: python
import order as od
class MyClass(od.TagMixin):
pass
c = MyClass(tags={"foo", "bar"})
c.has_tag("foo")
# -> True
c.has_tag("baz")
# -> False
c.has_tag(("foo", "baz"), mode=any) # the default mode
# -> True
c.has_tag(("foo", "baz"), mode=all)
# -> False
c.has_tag(("foo", "ba*"), mode=all)
# -> True
c.has_tag(("foo", "ba(r|z)"), mode=all, func="re")
# -> True
**Members**
.. py:attribute:: tags
type: set
The set of tags of this object. See :py:meth:`has_tag` for information about how to evaluate
them with patterns or regular expressions.
"""
copy_specs = []
def __init__(self, tags=None):
super(TagMixin, self).__init__()
# instance members
self._tags = set()
# set initial tags
if tags is not None:
self.tags = tags
@typed
def tags(self, tags):
# tags parser
if isinstance(tags, six.string_types):
tags = {tags}
if not isinstance(tags, (set, list, tuple)):
raise TypeError("invalid tags type: {}".format(tags))
_tags = set()
for tag in tags:
if not isinstance(tag, six.string_types):
raise TypeError("invalid tag type: {}".format(tag))
_tags.add(str(tag))
return _tags
[docs] def add_tag(self, tag):
"""
Adds a new *tag* to the set of tags.
"""
self._tags.update(self.__class__.tags.fparse(self, tag))
[docs] def remove_tag(self, tag):
"""
Removes a previously added *tag* from the set if tags.
"""
self._tags.difference_update(self.__class__.tags.fparse(self, tag))
[docs] def has_tag(self, tag, mode=any, **kwargs):
""" has_tag(tag, mode=any, **kwargs)
Returns *True* when this object is tagged with *tag*, *False* otherwise. When *tag* is a
sequence of tags, the behavior is defined by *mode*. For *any*, the object is considered
*tagged* when at least one of the provided tags matches. When *all*, all provided tags have
to match. Each *tag* can be a *fnmatch* or *re* pattern. All *kwargs* are passed to
:py:func:`util.multi_match`.
"""
match = lambda tag: any(multi_match(t, [tag], **kwargs) for t in self.tags)
return mode(match(tag) for tag in make_list(tag))
[docs]class DataSourceMixin(object):
"""
Mixin-class that provides convenience attributes for distinguishing between MC and real data.
**Arguments**
*is_data* initializes the same-named attribute.
**Example**
.. code-block:: python
import order as od
class MyClass(od.DataSourceMixin):
pass
c = MyClass(is_data=False)
c.is_data
# -> False
c.data_source
# -> "mc"
c.is_data = True
c.data_source
# -> "data"
**Members**
.. py:classattribute:: DATA_SOURCE_DATA
type: string
The data source string for data (``"data"``).
.. py:classattribute:: DATA_SOURCE_MC
type: string
The data source string for mc (``"mc"``).
.. py:classattribute:: allow_undefined_data_source
type: boolean
A configuration flag for this class that decides whether empty (*None*) data sources are
allowed. *False* by default.
.. py:attribute:: is_data
type: boolean
*True* if this object contains information on real data.
.. py:attribute:: is_mc
type: boolean
*True* if this object contains information on MC data.
.. py:attribute:: data_source
type: string
Either *DATA_SOURCE_DATA* or *DATA_SOURCE_MC*, depending on the source of contained data.
"""
DATA_SOURCE_DATA = "data"
DATA_SOURCE_MC = "mc"
# whether the data source is allowed to be undefined / None
allow_undefined_data_source = False
copy_specs = []
def __init__(self, is_data=False):
super(DataSourceMixin, self).__init__()
# instance members
self._is_data = None
# set the initial is_data value
self.is_data = is_data
@property
def is_data(self):
return self._is_data
@is_data.setter
def is_data(self, is_data):
if is_data is None and self.allow_undefined_data_source:
self._is_data = None
elif isinstance(is_data, bool):
self._is_data = is_data
else:
raise TypeError("invalid is_data type: {}".format(is_data))
@property
def is_mc(self):
return None if self.is_data is None else (not self.is_data)
@is_mc.setter
def is_mc(self, is_mc):
if is_mc is None and self.allow_undefined_data_source:
self._is_data = None
elif isinstance(is_mc, bool):
self._is_data = not is_mc
else:
raise TypeError("invalid is_mc type: {}".format(is_mc))
@property
def data_source(self):
if self.is_data is None:
return None
return self.DATA_SOURCE_DATA if self.is_data else self.DATA_SOURCE_MC
[docs]class SelectionMixin(object):
"""
Mixin-class that adds attibutes and methods to describe a selection rule, either as strings,
bare callables, or sequences of the two. When rules are defined as strings, ROOT- or
numexpr-style expression syntax are supported with convenient logical concatenation.
**Arguments**
*selection* and *str_selection_mode* initialize the same-named attributes.
**Example**
.. code-block:: python
import order as od
class MyClass(od.SelectionMixin):
pass
# ROOT-style string expressions
c = MyClass(selection="branchA > 0", str_selection_mode=MyClass.MODE_ROOT)
c.selection
# -> "branchA > 0"
c.add_selection("myBranchB < 100")
c.selection
# -> "(myBranchA > 0) && (myBranchB < 100)"
c.add_selection("myWeight", op="*")
c.selection
# -> "((myBranchA > 0) && (myBranchB < 100)) * (myWeight)"
# numexpr-style string expressions
c = MyClass(selection="branchA > 0", str_selection_mode=MyClass.MODE_NUMEXPR)
c.add_selection("myBranchB < 100")
c.selection
# -> "(myBranchA > 0) & (myBranchB < 100)"
def my_selection(*args, **kwargs):
...
c.selection = my_selection
c.selection
# -> <function my_selection()>
c.str_selection_mode
# -> None
c.add_selection("myBranchB < 100")
# -> TypeError
**Members**
.. py:classattribute:: MODE_ROOT
type: string
Flag denoting the ROOT-style selection mode (``"root"``).
.. py:classattribute:: MODE_NUMEXP
type: string
Flag denoting the numexpr-style selection mode (``"numexpr"``).
.. py:classattribute:: default_str_selection_mode
type: string
The default *str_selection_mode* when none is given in the instance constructor. It is
initially set to *MODE_NUMEXPR* if :py:attr:`order.util.ROOT_DEFAULT` is *false*, or to
*MODE_ROOT* otherwise.
.. py:attribute:: selection
type: string, callable, list
The selection string, callable or a sequence of them. When a string,
:py:attr:`str_selection_mode` decides how the string is treated.
.. py:attribute:: str_selection_mode
type: string, None
The selection mode. Should either be *MODE_ROOT* or *MODE_NUMEXPR*. Only considered when
:py:attr:`selection` is a string.
"""
MODE_ROOT = "root"
MODE_NUMEXPR = "numexpr"
default_str_selection_mode = MODE_ROOT if ROOT_DEFAULT else MODE_NUMEXPR
copy_specs = []
def __init__(self, selection=None, str_selection_mode=None):
super(SelectionMixin, self).__init__()
# instance members
self._selection = "1"
self._str_selection_mode = None
# fallback to default selection mode
if str_selection_mode is None:
str_selection_mode = self.default_str_selection_mode
# set initial values
self.str_selection_mode = str_selection_mode
if selection is not None:
self.selection = selection
@property
def selection(self):
# selection getter
return self._selection
@selection.setter
def selection(self, selection):
if selection is None:
raise TypeError("invalid selection: {}".format(selection))
# just store the valud when not a string
if not isinstance(selection, six.string_types):
self._selection = selection
self._str_selection_mode = None
return
# interpret as string, get the selection mode
if self.str_selection_mode == self.MODE_ROOT:
join = join_root_selection
elif self.str_selection_mode == self.MODE_NUMEXPR:
join = join_numexpr_selection
else:
raise Exception("when selection is a string, selection mode must be set")
try:
self._selection = join(selection)
except:
raise TypeError("invalid selection type: {}".format(selection))
@typed
def str_selection_mode(self, str_selection_mode):
# str_selection_mode parser
if str_selection_mode is None:
return str_selection_mode
if not isinstance(str_selection_mode, six.string_types):
raise TypeError("invalid str_selection_mode type: {}".format(str_selection_mode))
str_selection_mode = str(str_selection_mode)
if str_selection_mode not in (self.MODE_ROOT, self.MODE_NUMEXPR):
raise ValueError("unknown str_selection_mode: {}".format(str_selection_mode))
return str_selection_mode
[docs] def add_selection(self, selection, **kwargs):
"""
Adds a *selection* string to the current one if it is also a string. The new string will be
logically connected via *AND* by default, which can be configured through *kwargs*. All
*kwargs* are forwarded to
:py:func:`util.join_root_selection` or :py:func:`util.join_numexpr_selection`.
"""
if not isinstance(self.selection, six.string_types):
raise TypeError(
"cannot add selection expressions to existing non-string " +
"selection {}".format(self.selection),
)
if self.str_selection_mode == self.MODE_ROOT:
join = join_root_selection
elif self.str_selection_mode == self.MODE_NUMEXPR:
join = join_numexpr_selection
else:
raise Exception("when selection is a string, selection mode must be set")
self.selection = join(self.selection, selection, **kwargs)
[docs]class LabelMixin(object):
r"""
Mixin-class that provides a label, a short version of that label, and some convenience
attributes.
**Arguments**
*label* and *label_short* initialize the same-named attributes.
**Example**
.. code-block:: python
import order as od
l = od.LabelMixin(label="Muon")
l.label
# -> "Muon"
# when not set, the short label returns the normal label
l.label_short
# -> "Muon"
l.label_short = r"$\mu$"
l.label_short
# -> "$\mu$"
# conversion to ROOT-style latex
l.label_short_root
# -> "#mu"
**Members**
.. py:attribute:: label
type: string
The label. When this object has a *name* (configurable via *_label_fallback_attr*)
attribute, the label defaults to that value when not set.
.. py:attribute:: label_root
type: string (read-only)
The label, converted to ROOT-style latex.
.. py:attribute:: label_short
type: string
A short label, which defaults to the normal label when not set.
.. py:attribute:: label_short_root
type: string (read-only)
Short version of the label, converted to ROOT-style latex.
"""
copy_specs = []
def __init__(self, label=None, label_short=None):
super(LabelMixin, self).__init__()
# register empty attributes
self._label = None
self._label_short = None
# set initial values
if label is not None:
self.label = label
if label_short is not None:
self.label_short = label_short
# attribute to query for fallback label
self._label_fallback_attr = "name"
@property
def label(self):
# label getter
if self._label is not None or self._label_fallback_attr is None:
return self._label
else:
return getattr(self, self._label_fallback_attr, None)
@label.setter
def label(self, label):
# label setter
if label is None:
self._label = None
elif isinstance(label, six.string_types):
self._label = str(label)
else:
raise TypeError("invalid label type: {}".format(label))
@property
def label_root(self):
# label_root getter
return to_root_latex(self.label)
@property
def label_short(self):
# label_short getter
return self.label if self._label_short is None else self._label_short
@label_short.setter
def label_short(self, label_short):
# label_short setter
if label_short is None:
self._label_short = None
elif isinstance(label_short, six.string_types):
self._label_short = str(label_short)
else:
raise TypeError("invalid label_short type: {}".format(label_short))
@property
def label_short_root(self):
# label_short_root getter
return to_root_latex(self.label_short)
[docs]class ColorMixin(object):
"""
Mixin-class that provides a color in terms of RGB values as well as some convenience methods.
Internally, up to three different color values are stored, accessible through attributes such as
:py:attr:`color1`, :py:attr:`color2` and :py:attr:`color3`. For convenience (and backwards
compatibility), omitting the number will forward to the primary color (1).
**Arguments**
Each *color* arguments can be a tuple of 3 or 4 numbers that are interpreted as red, green and
blue color values, and optinally an alpha value. Internally, all values are stored as floats, so
when integers are passed, they are divided by 255. Similar to the access, when *color1* is not
set but *color* is, the latter is interpreted as the former.
**Example**
.. code-block:: python
import order as od
c = od.ColorMixin(color=(255, 0.5, 100), color2="#00f")
c.color
# -> (1.0, 0.5, 0.392)
c.color_int
# -> (255, 128, 100)
c.color_alpha
# -> 1.0
c.color2_int
# -> (0, 0, 255)
**Members**
.. py:attribute:: color1_r
type: float
Red component of the primary color.
.. py:attribute:: color1_g
type: float
Green component of the primary color.
.. py:attribute:: color1_b
type: float
Blue component of the primary color.
.. py:attribute:: color1_r_int
type: int
Red component of the primary color, converted to an integer in the [0, 255] range.
.. py:attribute:: color1_g_int
type: int
Green component of the primary color, converted to an integer in the [0, 255] range.
.. py:attribute:: color1_b_int
type: int
Blue component of the primary color, converted to an integer in the [0, 255] range.
.. py:attribute:: color1_alpha
type: float
The alpha value of the primary color, defaults to 1.0.
.. py:attribute:: color1
type: tuple (float)
The RGB values of the primary color in a 3-tuple.
.. py:attribute:: color1_int
type: tuple (int)
The RGB int values of the primary color in a 3-tuple.
.. py:attribute:: color2_r
type: float
Red component of the secondary color.
.. py:attribute:: color2_g
type: float
Green component of the secondary color.
.. py:attribute:: color2_b
type: float
Blue component of the secondary color.
.. py:attribute:: color2_r_int
type: int
Red component of the secondary color, converted to an integer in the [0, 255] range.
.. py:attribute:: color2_g_int
type: int
Green component of the secondary color, converted to an integer in the [0, 255] range.
.. py:attribute:: color2_b_int
type: int
Blue component of the secondary color, converted to an integer in the [0, 255] range.
.. py:attribute:: color2_alpha
type: float
The alpha value of the secondary color, defaults to 1.0.
.. py:attribute:: color2
type: tuple (float)
The RGB values of the secondary color in a 3-tuple.
.. py:attribute:: color2_int
type: tuple (int)
The RGB int values of the secondary color in a 3-tuple.
.. py:attribute:: color3_r
type: float
Red component of the tertiary color.
.. py:attribute:: color3_g
type: float
Green component of the tertiary color.
.. py:attribute:: color3_b
type: float
Blue component of the tertiary color.
.. py:attribute:: color3_r_int
type: int
Red component of the tertiary color, converted to an integer in the [0, 255] range.
.. py:attribute:: color3_g_int
type: int
Green component of the tertiary color, converted to an integer in the [0, 255] range.
.. py:attribute:: color3_b_int
type: int
Blue component of the tertiary color, converted to an integer in the [0, 255] range.
.. py:attribute:: color3_alpha
type: float
The alpha value of the tertiary color, defaults to 1.0.
.. py:attribute:: color3
type: tuple (float)
The RGB values of the tertiary color in a 3-tuple.
.. py:attribute:: color3_int
type: tuple (int)
The RGB int values of the tertiary color in a 3-tuple.
.. py:attribute:: color_r
type: float
Shorthand for :py:attr:`color1_r`.
.. py:attribute:: color_g
type: float
Shorthand for :py:attr:`color1_g`.
.. py:attribute:: color_b
type: float
Shorthand for :py:attr:`color1_b`.
.. py:attribute:: color_r_int
type: int
Shorthand for :py:attr:`color1_r_int`.
.. py:attribute:: color_g_int
type: int
Shorthand for :py:attr:`color1_g_int`.
.. py:attribute:: color_b_int
type: int
Shorthand for :py:attr:`color1_b_int`.
.. py:attribute:: color_alpha
type: float
Shorthand for :py:attr:`color1_alpha`.
.. py:attribute:: color
type: tuple (float)
Shorthand for :py:attr:`color1`.
.. py:attribute:: color_int
type: tuple (int)
Shorthand for :py:attr:`color1_int`.
"""
default_color = (0.0, 0.0, 0.0, 1.0)
copy_specs = []
def __init__(self, color=None, color1=None, color2=None, color3=None):
super(ColorMixin, self).__init__()
# instance members
self._color1_set = False
self._color1_r, self._color1_g, self._color1_b, self._color1_alpha = self.default_color
self._color2_set = False
self._color2_r, self._color2_g, self._color2_b, self._color2_alpha = self.default_color
self._color3_set = False
self._color3_r, self._color3_g, self._color3_b, self._color3_alpha = self.default_color
# set initial values
if color1 is not None:
self.color1 = color1
elif color is not None:
self.color1 = color
if color2 is not None:
self.color2 = color2
if color3 is not None:
self.color3 = color3
@classmethod
def _parse_color_channel(cls, name, value):
if isinstance(value, six.integer_types):
if not (0 <= value <= 255):
raise ValueError("invalid {} value: {}".format(name, value))
value /= 255.0
elif isinstance(value, float):
if not (0 <= value <= 1):
raise ValueError("invalid {} value: {}".format(name, value))
else:
raise TypeError("invalid {} type: {}".format(name, value))
return value
@classmethod
def _parse_color_alpha(cls, name, value):
if isinstance(value, (float, int)):
if not (0 <= value <= 1):
raise ValueError("invalid {} value: {}".format(name, value))
else:
raise TypeError("invalid {} type: {}".format(name, value))
return float(value)
@classmethod
def _parse_color(cls, name, value):
if isinstance(value, six.string_types):
m = re.match(r"^\#([abcdef0-9]{3}|[abcdef0-9]{6})$", value.lower())
if not m:
raise ValueError("invalid {} value: {}".format(name, value))
s = m.group(1)
if len(s) == 3:
s = "".join(c1 + c2 for c1, c2 in zip(s, s))
value = [int(s[2 * i:2 * i + 2], base=16) for i in range(3)]
if not isinstance(value, (tuple, list)):
raise TypeError("invalid {} type: {}".format(name, value))
elif not len(value) in (3, 4):
raise ValueError("invalid {} value: {}".format(name, value))
return value
@classmethod
def _float_to_int(cls, value):
return min(255, max(0, int(round(value * 255))))
# primary color
@property
def color1_r(self):
return self._color1_r if self._color1_set else None
@color1_r.setter
def color1_r(self, color1_r):
self._color1_set = color1_r is not None
if self._color1_set:
self._color1_r = self._parse_color_channel("color1_r", color1_r)
else:
self.color1 = None
@property
def color1_g(self):
return self._color1_g if self._color1_set else None
@color1_g.setter
def color1_g(self, color1_g):
self._color1_set = color1_g is not None
if self._color1_set:
self._color1_g = self._parse_color_channel("color1_g", color1_g)
else:
self.color1 = None
@property
def color1_b(self):
return self._color1_b if self._color1_set else None
@color1_b.setter
def color1_b(self, color1_b):
self._color1_set = color1_b is not None
if self._color1_set:
self._color1_b = self._parse_color_channel("color1_b", color1_b)
else:
self.color1 = None
@property
def color1_alpha(self):
return self._color1_alpha if self._color1_set else None
@color1_alpha.setter
def color1_alpha(self, color1_alpha):
self._color1_set = color1_alpha is not None
if self._color1_set:
self._color1_alpha = self._parse_color_channel("color1_alpha", color1_alpha)
else:
self.color1 = None
@property
def color1(self):
return (self.color1_r, self.color1_g, self.color1_b) if self._color1_set else None
@color1.setter
def color1(self, color1):
color1_set = color1 is not None
color1 = self._parse_color("color1", color1) if color1_set else self.default_color
self.color1_r, self.color1_g, self.color1_b = color1[:3]
if len(color1) == 4:
self._color1_alpha = color1[3]
self._color1_set = color1_set
@property
def color1_r_int(self):
return self._float_to_int(self.color1_r) if self._color1_set else None
@property
def color1_g_int(self):
return self._float_to_int(self.color1_g) if self._color1_set else None
@property
def color1_b_int(self):
return self._float_to_int(self.color1_b) if self._color1_set else None
@property
def color1_int(self):
return (
self.color1_r_int,
self.color1_g_int,
self.color1_b_int,
) if self._color1_set else None
# primary color shorthands
color_r = color1_r
color_g = color1_g
color_b = color1_b
color_alpha = color1_alpha
color = color1
color_r_int = color1_r_int
color_g_int = color1_g_int
color_b_int = color1_b_int
color_int = color1_int
# secondary color
@property
def color2_r(self):
return self._color2_r if self._color2_set else None
@color2_r.setter
def color2_r(self, color2_r):
self._color2_set = color2_r is not None
if self._color2_set:
self._color2_r = self._parse_color_channel("color2_r", color2_r)
else:
self.color2 = None
@property
def color2_g(self):
return self._color2_g if self._color2_set else None
@color2_g.setter
def color2_g(self, color2_g):
self._color2_set = color2_g is not None
if self._color2_set:
self._color2_g = self._parse_color_channel("color2_g", color2_g)
else:
self.color2 = None
@property
def color2_b(self):
return self._color2_b if self._color2_set else None
@color2_b.setter
def color2_b(self, color2_b):
self._color2_set = color2_b is not None
if self._color2_set:
self._color2_b = self._parse_color_channel("color2_b", color2_b)
else:
self.color2 = None
@property
def color2_alpha(self):
return self._color2_alpha if self._color2_set else None
@color2_alpha.setter
def color2_alpha(self, color2_alpha):
self._color2_set = color2_alpha is not None
if self._color2_set:
self._color2_alpha = self._parse_color_channel("color2_alpha", color2_alpha)
else:
self.color2 = None
@property
def color2(self):
return (self.color2_r, self.color2_g, self.color2_b) if self._color2_set else None
@color2.setter
def color2(self, color2):
color2_set = color2 is not None
color2 = self._parse_color("color2", color2) if color2_set else self.default_color
self.color2_r, self.color2_g, self.color2_b = color2[:3]
if len(color2) == 4:
self._color2_alpha = color2[3]
self._color2_set = color2_set
@property
def color2_r_int(self):
return self._float_to_int(self.color2_r) if self._color2_set else None
@property
def color2_g_int(self):
return self._float_to_int(self.color2_g) if self._color2_set else None
@property
def color2_b_int(self):
return self._float_to_int(self.color2_b) if self._color2_set else None
@property
def color2_int(self):
return (
self.color2_r_int,
self.color2_g_int,
self.color2_b_int,
) if self._color2_set else None
# tertiary color
@property
def color3_r(self):
return self._color3_r if self._color3_set else None
@color3_r.setter
def color3_r(self, color3_r):
self._color3_set = color3_r is not None
if self._color3_set:
self._color3_r = self._parse_color_channel("color3_r", color3_r)
else:
self.color3 = None
@property
def color3_g(self):
return self._color3_g if self._color3_set else None
@color3_g.setter
def color3_g(self, color3_g):
self._color3_set = color3_g is not None
if self._color3_set:
self._color3_g = self._parse_color_channel("color3_g", color3_g)
else:
self.color3 = None
@property
def color3_b(self):
return self._color3_b if self._color3_set else None
@color3_b.setter
def color3_b(self, color3_b):
self._color3_set = color3_b is not None
if self._color3_set:
self._color3_b = self._parse_color_channel("color3_b", color3_b)
else:
self.color3 = None
@property
def color3_alpha(self):
return self._color3_alpha if self._color3_set else None
@color3_alpha.setter
def color3_alpha(self, color3_alpha):
self._color3_set = color3_alpha is not None
if self._color3_set:
self._color3_alpha = self._parse_color_channel("color3_alpha", color3_alpha)
else:
self.color3 = None
@property
def color3(self):
return (self.color3_r, self.color3_g, self.color3_b) if self._color3_set else None
@color3.setter
def color3(self, color3):
color3_set = color3 is not None
color3 = self._parse_color("color3", color3) if color3_set else self.default_color
self.color3_r, self.color3_g, self.color3_b = color3[:3]
if len(color3) == 4:
self._color3_alpha = color3[3]
self._color3_set = color3_set
@property
def color3_r_int(self):
return self._float_to_int(self.color3_r) if self._color3_set else None
@property
def color3_g_int(self):
return self._float_to_int(self.color3_g) if self._color3_set else None
@property
def color3_b_int(self):
return self._float_to_int(self.color3_b) if self._color3_set else None
@property
def color3_int(self):
return (
self.color3_r_int,
self.color3_g_int,
self.color3_b_int,
) if self._color3_set else None
