Python collections 模块，MutableSequence() 实例源码
我们从Python开源项目中，提取了以下50个代码示例，用于说明如何使用collections.MutableSequence()。
def __init__(
self,
name=None,
children=None,
source_range=None,
metadata=None
):
item.Item.__init__(
self,
name=name,
source_range=source_range,
metadata=metadata
)
collections.MutableSequence.__init__(self)
self._children = []
if children:
# cannot simply set ._children to children since __setitem__ runs
# extra logic (assigning ._parent pointers).
self.extend(children)
def update(self, d):
"""Like the dictionary .update() method.
Update the data dictionary of this SerializableObject with the .data
of d if d is a SerializableObject or if d is a dictionary, d itself.
"""
# use the parent update function
super(Composition, self).update(d)
# ...except for the 'children' field, which needs to run through the
# insert method so that _parent pointers are correctly set on children.
self._children = []
self.extend(d.get('children', []))
# @}
# @{ collections.MutableSequence implementation
def __repr__(self):
return (
"otio.{}("
"name={}, "
"children={}, "
"metadata={}"
")".format(
self._class_path,
repr(self.name),
repr(self._children),
repr(self.metadata)
)
)
# @}
# @{ collections.MutableSequence implementation
def prepend(self, container):
"""Insert objects at the start of the container"""
if not isinstance(container, collections.MutableSequence):
container = [container]
container.reverse()
for x in container:
if self._current != x:
try:
self._container.remove(x)
except ValueError:
pass
self._container.appendleft(x)
try:
self._container.remove(self._current)
self._container.appendleft(self._current)
except ValueError:
pass
if self._current is None and any(self._container):
self._current = self._container[0]
def test_list():
immutable_list = List([1, 2])
with raises(AttributeError):
immutable_list.append(1)
with raises(TypeError):
immutable_list + [3]
assert isinstance(immutable_list, collections.Sequence)
assert not isinstance(immutable_list, collections.MutableSequence)
assert immutable_list[0] == 1
assert len(immutable_list) == 2
assert 2 in immutable_list
assert next(iter(immutable_list)) == 1
assert immutable_list.index(2) == 1
assert immutable_list.count(1) == 1
assert immutable_list.count(2) == 1
assert immutable_list.count(3) == 0
def print_list():
cfg = get_config()
meta = {'hostvars': {}}
for alias, attributes in cfg.items():
tmp_dict = {}
for az_opt, ans_opt in _az_to_ansible:
if az_opt in attributes:
# If the attribute is a list, just take the first element.
# Private key is returned in a list for some reason.
attr = attributes[az_opt]
if isinstance(attr, MutableSequence):
attr = attr[0]
tmp_dict[ans_opt] = attr
if tmp_dict:
meta['hostvars'][alias] = tmp_dict
print(json.dumps({_key: list(set(meta['hostvars'].keys())), '_meta': meta}))
def __init__(self, cell_size, default_list=list):
"""Initialize
Args:
cell_size (float):
default_list (Callable[MutableSequence]):
Must have append method. For example
- ``list``
- ``SortedList``
- ``lambda: array(typecode)``
"""
assert cell_size > 0
assert callable(default_list)
self._cell_size = cell_size
self._list = default_list
self._blocks = defaultdict(default_list)
self._str = \
"cell_size: {cell_size}\n" \
"default_list: {default_list}".format(
cell_size=cell_size, default_list=default_list)
def remove_values(value, no_log_strings):
""" Remove strings in no_log_strings from value. If value is a container
type, then remove a lot more"""
deferred_removals = deque()
no_log_strings = [to_native(s, errors='surrogate_or_strict') for s in no_log_strings]
new_value = _remove_values_conditions(value, no_log_strings, deferred_removals)
while deferred_removals:
old_data, new_data = deferred_removals.popleft()
if isinstance(new_data, Mapping):
for old_key, old_elem in old_data.items():
new_elem = _remove_values_conditions(old_elem, no_log_strings, deferred_removals)
new_data[old_key] = new_elem
else:
for elem in old_data:
new_elem = _remove_values_conditions(elem, no_log_strings, deferred_removals)
if isinstance(new_data, MutableSequence):
new_data.append(new_elem)
elif isinstance(new_data, MutableSet):
new_data.add(new_elem)
else:
raise TypeError('Unknown container type encountered when removing private values from output')
return new_value
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def flatten(d, sep='.'):
"""Flatten a data structure into tuples"""
def _flatten(e, parent_key='', sep='.'):
import collections
prefix = parent_key + sep if parent_key else ''
if isinstance(e, collections.MutableMapping):
return tuple((prefix + k2, v2) for k, v in e.items() for k2, v2 in _flatten(v, k, sep))
elif isinstance(e, collections.MutableSequence):
return tuple((prefix + k2, v2) for i, v in enumerate(e) for k2, v2 in _flatten(v, str(i), sep))
else:
return (parent_key, (e,)),
return tuple((k, v[0]) for k, v in _flatten(d, '', sep))
# From http://stackoverflow.com/a/2597440
def find_protos(proto_paths, excluded_proto_path):
"""Searches along `proto_paths` for .proto files and returns a generator of
paths"""
if not isinstance(proto_paths, (types.GeneratorType, collections.MutableSequence)):
raise ValueError("proto_paths must be a list")
for path in proto_paths:
if os.path.isdir(path):
for root, _, files in os.walk(path):
for proto in files:
is_excluded = _is_proto_excluded(os.path.join(root, proto),
excluded_proto_path)
if os.path.splitext(proto)[1] == '.proto' and not is_excluded:
yield os.path.join(root, proto)
elif os.path.isfile(path) and os.path.splitext(path)[1] == '.proto':
yield path
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def _transform_list(self, model, params, transformation, target_shape):
if not isinstance(params, MutableSequence):
return
member_model = model.member
member_shape = member_model.name
for i, item in enumerate(params):
if member_shape == target_shape:
params[i] = transformation(item)
else:
self._transform_parameters(
member_model, params[i], transformation, target_shape)
def __init__(self, serializers):
if isinstance(serializers, collections.MutableSequence):
self.serializers = serializers
else:
self.serializers = [serializers]
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def __init__(self, iterable=None, owner=None, instance=None):
try:
self.seq = list(iterable)
except TypeError:
self.seq = list()
self.owner = owner
self.instance = instance
# Sized -> Sequence -> MutableSequence (Abstract Method)
def __len__(self):
return len(self.seq)
# Iterable -> Sequence -> MutableSequence (Abstract Method)
def __iter__(self):
return iter(self.seq)
# Container -> Sequence -> MutableSequence (Abstract Method)
def __contains__(self, elem):
return elem in self.seq
# MutableSequence (Abstract Method)
def notify(self):
if self.owner:
self.owner.__set__(self.instance, self.seq)
# MutableSequence (Abstract Method)
def __delitem__(self, key):
del self.seq[key]
self.notify()
# MutableSequence (Abstract Method)
def test_MutableSequence(self):
for sample in [tuple, str, bytes]:
self.assertNotIsInstance(sample(), MutableSequence)
self.assertFalse(issubclass(sample, MutableSequence))
for sample in [list, bytearray]:
self.assertIsInstance(sample(), MutableSequence)
self.assertTrue(issubclass(sample, MutableSequence))
self.assertFalse(issubclass(str, MutableSequence))
self.validate_abstract_methods(MutableSequence, '__contains__', '__iter__',
'__len__', '__getitem__', '__setitem__', '__delitem__', 'insert')
################################################################################
### Counter
################################################################################
def _transform_list(self, model, params, transformation, target_shape):
if not isinstance(params, MutableSequence):
return
member_model = model.member
member_shape = member_model.name
for i, item in enumerate(params):
if member_shape == target_shape:
params[i] = transformation(item)
else:
self._transform_parameters(
member_model, params[i], transformation, target_shape)
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def testRepeatedFieldsAreSequences(self, message_module):
m = message_module.TestAllTypes()
self.assertIsInstance(m.repeated_int32, collections.MutableSequence)
self.assertIsInstance(m.repeated_nested_message,
collections.MutableSequence)
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False
def test_MutableSequence(self):
for sample in [tuple, str]:
self.assertNotIsInstance(sample(), MutableSequence)
self.assertFalse(issubclass(sample, MutableSequence))
for sample in [list]:
self.assertIsInstance(sample(), MutableSequence)
self.assertTrue(issubclass(sample, MutableSequence))
self.assertFalse(issubclass(basestring, MutableSequence))
self.validate_abstract_methods(MutableSequence, '__contains__', '__iter__',
'__len__', '__getitem__', '__setitem__', '__delitem__', 'insert')
def test_MutableSequence(self):
for sample in [tuple, str]:
self.assertNotIsInstance(sample(), MutableSequence)
self.assertFalse(issubclass(sample, MutableSequence))
for sample in [list]:
self.assertIsInstance(sample(), MutableSequence)
self.assertTrue(issubclass(sample, MutableSequence))
self.assertFalse(issubclass(basestring, MutableSequence))
self.validate_abstract_methods(MutableSequence, '__contains__', '__iter__',
'__len__', '__getitem__', '__setitem__', '__delitem__', 'insert')
def append(self, container):
"""Insert objects at the end of the container"""
if not isinstance(container, collections.MutableSequence):
container = [container]
for x in container:
try:
self._container.remove(x)
except ValueError:
pass
self._container.append(x)
if self._current is None and any(self._container):
self._current = self._container[0]
def remove(self, container):
"""Remove objects from the container"""
if not isinstance(container, collections.MutableSequence):
container = [container]
for x in container:
try:
self._container.remove(x)
except ValueError:
pass
def modifies_known_mutable(obj, attr):
"""This function checks if an attribute on a builtin mutable object
(list, dict, set or deque) would modify it if called. It also supports
the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
with Python 2.6 onwards the abstract base classes `MutableSet`,
`MutableMapping`, and `MutableSequence`.
>>> modifies_known_mutable({}, "clear")
True
>>> modifies_known_mutable({}, "keys")
False
>>> modifies_known_mutable([], "append")
True
>>> modifies_known_mutable([], "index")
False
If called with an unsupported object (such as unicode) `False` is
returned.
>>> modifies_known_mutable("foo", "upper")
False
"""
for typespec, unsafe in _mutable_spec:
if isinstance(obj, typespec):
return attr in unsafe
return False