(self, key, fail_value=None)
return fail_value
find the value given a key
find the value given a key
find the value given a key
def get_value(self, key, fail_value=None):
		"""find the value given a key"""
		if key in self:
			return self[key]
		return fail_value
def get_value ( self , key , fail_value = None ) : if key in self : return self [ key ] return fail_value