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class AttrDict(dict):
"""
Like a dictionary except values can be accessed as attributes i.e. obj.foo
can be used in addition to obj['foo'].
If an item is not present None is returned.
"""
def __getattr__(self, key):
try:
return self[key]
except KeyError:
return None
def __setattr__(self, key, value):
self[key] = value
def __delattr__(self, key):
try:
del self[key]
except KeyError as k:
raise AttributeError(k)
def __repr__(self):
return '<AttrDict ' + dict.__repr__(self) + '>'
def __getstate__(self):
return dict(self)
def __setstate__(self, value):
for k, v in value.items():
self[k] = v
class DefaultAttrDict(AttrDict):
def __getattr__(self, key):
try:
return self[key]
except KeyError as k:
if '_default' in self:
return self['_default']
else:
raise AttributeError from k
class InsensitiveDict(dict):
"""
Like a dictionary except key access is case insensitive.
Keys are stored in lower case.
"""
def __getitem__(self, key):
return dict.__getitem__(self, key.lower())
def __setitem__(self, key, value):
dict.__setitem__(self, key.lower(), value)
def __delitem__(self, key):
dict.__delitem__(self, key.lower())
def get(self, key, default=None):
return dict.get(self, key.lower(), default)
def update(self, dict):
for k, v in dict.items():
self[k] = v
def setdefault(self, key, default=None):
return dict.setdefault(self, key.lower(), default)
def __contains__(self, key):
return key.lower() in dict(self)
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