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class LookupDictionary(dict):
"""
a dictionary which can lookup value by key, or keys by value
"""
def __init__(self, items=[]):
"""items can be a list of pair_lists or a dictionary"""
dict.__init__(self, items)
def get_keys_for_value(self, value, fail_value=None):
"""find the key(s) as a list given a value"""
list_result = [item[0] for item in self.items() if item[1] == value]
if len(list_result) > 0:
return list_result
return fail_value
def get_first_key_for_value(self, value, fail_value=None):
"""return the first key of this dictionary given the value"""
list_result = [item[0] for item in self.items() if item[1] == value]
if len(list_result) > 0:
return list_result[0]
return fail_value
def get_value(self, key, fail_value=None):
"""find the value given a key"""
if key in self:
return self[key]
return fail_value
class Enum(LookupDictionary):
def __init__(self, initial_value=0, items=[]):
"""items can be a list of pair_lists or a dictionary"""
LookupDictionary.__init__(self, items)
self.value = initial_value
def set_value(self, v):
v_typename = typeof(v).__name__
if v_typename == "str":
if str in self:
v = self[v]
else:
v = 0
else:
self.value = v
def get_enum_value(self):
return self.value
def get_enum_name(self):
return self.__str__()
def __str__(self):
s = self.get_first_key_for_value(self.value, None)
if s is None:
s = "%#8.8x" % self.value
return s
def __repr__(self):
return self.__str__()
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