def update(self, dictionary):
"""Extend dict.update() to handle *named tags*."""
for key, value in dictionary.items():
if is_stringlike(key):
setattr(self, key, value)
else:
self[Tag(key)] = value
def __contains__(self, name):
"""Extend dict.__contains__() to handle *named tags*.
This is called for code like: ``if 'SliceLocation' in dataset``.
"""
if is_stringlike(name):
tag = TagForName(name)
else:
try:
tag = Tag(name)
except:
return False
if tag:
return dict.__contains__(self, tag)
else:
return dict.__contains__(self, name) # will no doubt raise an exception
def get(self, key, default=None):
"""Extend dict.get() to handle *named tags*."""
if is_stringlike(key):
try:
return getattr(self, key)
except AttributeError:
return default
else:
# is not a string, try to make it into a tag and then hand it
# off to the underlying dict
if not isinstance(key, BaseTag):
try:
key = Tag(key)
except:
raise TypeError("Dataset.get key must be a string or tag")
try:
return_val = self.__getitem__(key)
except KeyError:
return_val = default
return return_val
