mirror of
https://github.com/thegeeklab/ansible-later.git
synced 2024-11-16 10:00:39 +00:00
291 lines
9.5 KiB
Python
291 lines
9.5 KiB
Python
|
from __future__ import absolute_import, division, print_function
|
||
|
|
|
||
|
|
import copy
|
||
|
|
|
||
|
|
from ._compat import iteritems
|
||
|
|
from ._make import NOTHING, _obj_setattr, fields
|
||
|
|
from .exceptions import AttrsAttributeNotFoundError
|
||
|
|
|
||
|
|
|
||
|
|
def asdict(
|
||
|
|
inst,
|
||
|
|
recurse=True,
|
||
|
|
filter=None,
|
||
|
|
dict_factory=dict,
|
||
|
|
retain_collection_types=False,
|
||
|
|
):
|
||
|
|
"""
|
||
|
|
Return the ``attrs`` attribute values of *inst* as a dict.
|
||
|
|
|
||
|
|
Optionally recurse into other ``attrs``-decorated classes.
|
||
|
|
|
||
|
|
:param inst: Instance of an ``attrs``-decorated class.
|
||
|
|
:param bool recurse: Recurse into classes that are also
|
||
|
|
``attrs``-decorated.
|
||
|
|
:param callable filter: A callable whose return code determines whether an
|
||
|
|
attribute or element is included (``True``) or dropped (``False``). Is
|
||
|
|
called with the :class:`attr.Attribute` as the first argument and the
|
||
|
|
value as the second argument.
|
||
|
|
:param callable dict_factory: A callable to produce dictionaries from. For
|
||
|
|
example, to produce ordered dictionaries instead of normal Python
|
||
|
|
dictionaries, pass in ``collections.OrderedDict``.
|
||
|
|
:param bool retain_collection_types: Do not convert to ``list`` when
|
||
|
|
encountering an attribute whose type is ``tuple`` or ``set``. Only
|
||
|
|
meaningful if ``recurse`` is ``True``.
|
||
|
|
|
||
|
|
:rtype: return type of *dict_factory*
|
||
|
|
|
||
|
|
:raise attr.exceptions.NotAnAttrsClassError: If *cls* is not an ``attrs``
|
||
|
|
class.
|
||
|
|
|
||
|
|
.. versionadded:: 16.0.0 *dict_factory*
|
||
|
|
.. versionadded:: 16.1.0 *retain_collection_types*
|
||
|
|
"""
|
||
|
|
attrs = fields(inst.__class__)
|
||
|
|
rv = dict_factory()
|
||
|
|
for a in attrs:
|
||
|
|
v = getattr(inst, a.name)
|
||
|
|
if filter is not None and not filter(a, v):
|
||
|
|
continue
|
||
|
|
if recurse is True:
|
||
|
|
if has(v.__class__):
|
||
|
|
rv[a.name] = asdict(
|
||
|
|
v, True, filter, dict_factory, retain_collection_types
|
||
|
|
)
|
||
|
|
elif isinstance(v, (tuple, list, set)):
|
||
|
|
cf = v.__class__ if retain_collection_types is True else list
|
||
|
|
rv[a.name] = cf(
|
||
|
|
[
|
||
|
|
_asdict_anything(
|
||
|
|
i, filter, dict_factory, retain_collection_types
|
||
|
|
)
|
||
|
|
for i in v
|
||
|
|
]
|
||
|
|
)
|
||
|
|
elif isinstance(v, dict):
|
||
|
|
df = dict_factory
|
||
|
|
rv[a.name] = df(
|
||
|
|
(
|
||
|
|
_asdict_anything(
|
||
|
|
kk, filter, df, retain_collection_types
|
||
|
|
),
|
||
|
|
_asdict_anything(
|
||
|
|
vv, filter, df, retain_collection_types
|
||
|
|
),
|
||
|
|
)
|
||
|
|
for kk, vv in iteritems(v)
|
||
|
|
)
|
||
|
|
else:
|
||
|
|
rv[a.name] = v
|
||
|
|
else:
|
||
|
|
rv[a.name] = v
|
||
|
|
return rv
|
||
|
|
|
||
|
|
|
||
|
|
def _asdict_anything(val, filter, dict_factory, retain_collection_types):
|
||
|
|
"""
|
||
|
|
``asdict`` only works on attrs instances, this works on anything.
|
||
|
|
"""
|
||
|
|
if getattr(val.__class__, "__attrs_attrs__", None) is not None:
|
||
|
|
# Attrs class.
|
||
|
|
rv = asdict(val, True, filter, dict_factory, retain_collection_types)
|
||
|
|
elif isinstance(val, (tuple, list, set)):
|
||
|
|
cf = val.__class__ if retain_collection_types is True else list
|
||
|
|
rv = cf(
|
||
|
|
[
|
||
|
|
_asdict_anything(
|
||
|
|
i, filter, dict_factory, retain_collection_types
|
||
|
|
)
|
||
|
|
for i in val
|
||
|
|
]
|
||
|
|
)
|
||
|
|
elif isinstance(val, dict):
|
||
|
|
df = dict_factory
|
||
|
|
rv = df(
|
||
|
|
(
|
||
|
|
_asdict_anything(kk, filter, df, retain_collection_types),
|
||
|
|
_asdict_anything(vv, filter, df, retain_collection_types),
|
||
|
|
)
|
||
|
|
for kk, vv in iteritems(val)
|
||
|
|
)
|
||
|
|
else:
|
||
|
|
rv = val
|
||
|
|
return rv
|
||
|
|
|
||
|
|
|
||
|
|
def astuple(
|
||
|
|
inst,
|
||
|
|
recurse=True,
|
||
|
|
filter=None,
|
||
|
|
tuple_factory=tuple,
|
||
|
|
retain_collection_types=False,
|
||
|
|
):
|
||
|
|
"""
|
||
|
|
Return the ``attrs`` attribute values of *inst* as a tuple.
|
||
|
|
|
||
|
|
Optionally recurse into other ``attrs``-decorated classes.
|
||
|
|
|
||
|
|
:param inst: Instance of an ``attrs``-decorated class.
|
||
|
|
:param bool recurse: Recurse into classes that are also
|
||
|
|
``attrs``-decorated.
|
||
|
|
:param callable filter: A callable whose return code determines whether an
|
||
|
|
attribute or element is included (``True``) or dropped (``False``). Is
|
||
|
|
called with the :class:`attr.Attribute` as the first argument and the
|
||
|
|
value as the second argument.
|
||
|
|
:param callable tuple_factory: A callable to produce tuples from. For
|
||
|
|
example, to produce lists instead of tuples.
|
||
|
|
:param bool retain_collection_types: Do not convert to ``list``
|
||
|
|
or ``dict`` when encountering an attribute which type is
|
||
|
|
``tuple``, ``dict`` or ``set``. Only meaningful if ``recurse`` is
|
||
|
|
``True``.
|
||
|
|
|
||
|
|
:rtype: return type of *tuple_factory*
|
||
|
|
|
||
|
|
:raise attr.exceptions.NotAnAttrsClassError: If *cls* is not an ``attrs``
|
||
|
|
class.
|
||
|
|
|
||
|
|
.. versionadded:: 16.2.0
|
||
|
|
"""
|
||
|
|
attrs = fields(inst.__class__)
|
||
|
|
rv = []
|
||
|
|
retain = retain_collection_types # Very long. :/
|
||
|
|
for a in attrs:
|
||
|
|
v = getattr(inst, a.name)
|
||
|
|
if filter is not None and not filter(a, v):
|
||
|
|
continue
|
||
|
|
if recurse is True:
|
||
|
|
if has(v.__class__):
|
||
|
|
rv.append(
|
||
|
|
astuple(
|
||
|
|
v,
|
||
|
|
recurse=True,
|
||
|
|
filter=filter,
|
||
|
|
tuple_factory=tuple_factory,
|
||
|
|
retain_collection_types=retain,
|
||
|
|
)
|
||
|
|
)
|
||
|
|
elif isinstance(v, (tuple, list, set)):
|
||
|
|
cf = v.__class__ if retain is True else list
|
||
|
|
rv.append(
|
||
|
|
cf(
|
||
|
|
[
|
||
|
|
astuple(
|
||
|
|
j,
|
||
|
|
recurse=True,
|
||
|
|
filter=filter,
|
||
|
|
tuple_factory=tuple_factory,
|
||
|
|
retain_collection_types=retain,
|
||
|
|
)
|
||
|
|
if has(j.__class__)
|
||
|
|
else j
|
||
|
|
for j in v
|
||
|
|
]
|
||
|
|
)
|
||
|
|
)
|
||
|
|
elif isinstance(v, dict):
|
||
|
|
df = v.__class__ if retain is True else dict
|
||
|
|
rv.append(
|
||
|
|
df(
|
||
|
|
(
|
||
|
|
astuple(
|
||
|
|
kk,
|
||
|
|
tuple_factory=tuple_factory,
|
||
|
|
retain_collection_types=retain,
|
||
|
|
)
|
||
|
|
if has(kk.__class__)
|
||
|
|
else kk,
|
||
|
|
astuple(
|
||
|
|
vv,
|
||
|
|
tuple_factory=tuple_factory,
|
||
|
|
retain_collection_types=retain,
|
||
|
|
)
|
||
|
|
if has(vv.__class__)
|
||
|
|
else vv,
|
||
|
|
)
|
||
|
|
for kk, vv in iteritems(v)
|
||
|
|
)
|
||
|
|
)
|
||
|
|
else:
|
||
|
|
rv.append(v)
|
||
|
|
else:
|
||
|
|
rv.append(v)
|
||
|
|
return rv if tuple_factory is list else tuple_factory(rv)
|
||
|
|
|
||
|
|
|
||
|
|
def has(cls):
|
||
|
|
"""
|
||
|
|
Check whether *cls* is a class with ``attrs`` attributes.
|
||
|
|
|
||
|
|
:param type cls: Class to introspect.
|
||
|
|
:raise TypeError: If *cls* is not a class.
|
||
|
|
|
||
|
|
:rtype: :class:`bool`
|
||
|
|
"""
|
||
|
|
return getattr(cls, "__attrs_attrs__", None) is not None
|
||
|
|
|
||
|
|
|
||
|
|
def assoc(inst, **changes):
|
||
|
|
"""
|
||
|
|
Copy *inst* and apply *changes*.
|
||
|
|
|
||
|
|
:param inst: Instance of a class with ``attrs`` attributes.
|
||
|
|
:param changes: Keyword changes in the new copy.
|
||
|
|
|
||
|
|
:return: A copy of inst with *changes* incorporated.
|
||
|
|
|
||
|
|
:raise attr.exceptions.AttrsAttributeNotFoundError: If *attr_name* couldn't
|
||
|
|
be found on *cls*.
|
||
|
|
:raise attr.exceptions.NotAnAttrsClassError: If *cls* is not an ``attrs``
|
||
|
|
class.
|
||
|
|
|
||
|
|
.. deprecated:: 17.1.0
|
||
|
|
Use :func:`evolve` instead.
|
||
|
|
"""
|
||
|
|
import warnings
|
||
|
|
|
||
|
|
warnings.warn(
|
||
|
|
"assoc is deprecated and will be removed after 2018/01.",
|
||
|
|
DeprecationWarning,
|
||
|
|
stacklevel=2,
|
||
|
|
)
|
||
|
|
new = copy.copy(inst)
|
||
|
|
attrs = fields(inst.__class__)
|
||
|
|
for k, v in iteritems(changes):
|
||
|
|
a = getattr(attrs, k, NOTHING)
|
||
|
|
if a is NOTHING:
|
||
|
|
raise AttrsAttributeNotFoundError(
|
||
|
|
"{k} is not an attrs attribute on {cl}.".format(
|
||
|
|
k=k, cl=new.__class__
|
||
|
|
)
|
||
|
|
)
|
||
|
|
_obj_setattr(new, k, v)
|
||
|
|
return new
|
||
|
|
|
||
|
|
|
||
|
|
def evolve(inst, **changes):
|
||
|
|
"""
|
||
|
|
Create a new instance, based on *inst* with *changes* applied.
|
||
|
|
|
||
|
|
:param inst: Instance of a class with ``attrs`` attributes.
|
||
|
|
:param changes: Keyword changes in the new copy.
|
||
|
|
|
||
|
|
:return: A copy of inst with *changes* incorporated.
|
||
|
|
|
||
|
|
:raise TypeError: If *attr_name* couldn't be found in the class
|
||
|
|
``__init__``.
|
||
|
|
:raise attr.exceptions.NotAnAttrsClassError: If *cls* is not an ``attrs``
|
||
|
|
class.
|
||
|
|
|
||
|
|
.. versionadded:: 17.1.0
|
||
|
|
"""
|
||
|
|
cls = inst.__class__
|
||
|
|
attrs = fields(cls)
|
||
|
|
for a in attrs:
|
||
|
|
if not a.init:
|
||
|
|
continue
|
||
|
|
attr_name = a.name # To deal with private attributes.
|
||
|
|
init_name = attr_name if attr_name[0] != "_" else attr_name[1:]
|
||
|
|
if init_name not in changes:
|
||
|
|
changes[init_name] = getattr(inst, attr_name)
|
||
|
|
return cls(**changes)
|