def wrapper(*args, **kws):
"""The decorator itself, checks arguments with set operations, moves
args from *args into **kws, and then calls func().
Args:
*args, **kws: The arguments passed to the original function.
Returns:
The original function's result when it's called with the
modified arguments.
Raises:
TypeError: When there is a mismatch between the supplied
and expected arguments.
"""
keys = collections.KeysView(kws)
# Are all the keyword-only args covered either by a passed
# argument or a default?
if not kw_only_args <= keys | args_with_defaults:
wrong_args(func, signature,
kw_only_args - (keys | args_with_defaults),
'keyword-only')
# Are there enough positional args to cover all the
# arguments not covered by a passed argument or a default?
if len(args) < len(positional_args - (keys | args_with_defaults)):
wrong_args(func, signature,
positional_args - (keys | args_with_defaults),
'positional', len(args))
args = list(args)
for index, (name,
param) in enumerate(signature.parameters.items()):
if param.kind is param.VAR_POSITIONAL or param.kind is param.VAR_KEYWORD:
break
if name in kw_only_args or name in keys & positional_args:
args.insert(index, kws.pop(name, param.default))
func(*args, **kws)
def iterkeys(self):
return collections.KeysView(self.mapping)
def viewkeys(self):
return collections.KeysView(self)
def keys(self) -> Iterable[KT]:
return collections.KeysView(self)
def keys(self):
keys = set()
for _headers in self._all_headers:
for key in _headers.keys():
keys.add(key)
return collections.KeysView(keys)
device = {"hostname":"falcon"}
print(device)
device['vendor'] = 'nokia'
print(device)
device['model'] = '7750'
print(device)
device.setdefault('type', 'SR12')
print(device)
print(collections.Counter(device))
print(collections.ItemsView(device))
print(collections.KeysView(device))
print(collections.MappingView(device))
for k,v in device.items():
print(k,v)
for k,v in sorted(device.items()):
print(k,v)
for item in collections.ItemsView(device):
print(item)
device.pop('type')
print(device)
def _viewkeys(instance):
"Returns a :py:class:`collections.KeysView` of its own keys."
return collections.KeysView(instance._dict)
def keys(self) -> KeysView[bytes]:
return collections.KeysView(self.db.iterator(include_value=False))
