n9e ddlZddZy)Ncttr jddjfd}dj dD}dj ||rd|znd|| }|r t |d d lm}t|d } t||||S#t$r }tt|dz|z|d}~wwxYw)a Produces a class that either can be used standalone or as a base class for persistent classes. This is a thin wrapper around a named tuple. Constructing a type and using it to instantiate objects: >>> Point = immutable('x, y', name='Point') >>> p = Point(1, 2) >>> p2 = p.set(x=3) >>> p Point(x=1, y=2) >>> p2 Point(x=3, y=2) Inheriting from a constructed type. In this case no type name needs to be supplied: >>> class PositivePoint(immutable('x, y')): ... __slots__ = tuple() ... def __new__(cls, x, y): ... if x > 0 and y > 0: ... return super(PositivePoint, cls).__new__(cls, x, y) ... raise Exception('Coordinates must be positive!') ... >>> p = PositivePoint(1, 2) >>> p.set(x=3) PositivePoint(x=3, y=2) >>> p.set(y=-3) Traceback (most recent call last): Exception: Coordinates must be positive! The persistent class also supports the notion of frozen members. The value of a frozen member cannot be updated. For example it could be used to implement an ID that should remain the same over time. A frozen member is denoted by a trailing underscore. >>> Point = immutable('x, y, id_', name='Point') >>> p = Point(1, 2, id_=17) >>> p.set(x=3) Point(x=3, y=2, id_=17) >>> p.set(id_=18) Traceback (most recent call last): AttributeError: Cannot set frozen members id_ , cDcgc]}|jdsd|z}}|r!djdj|Sycc}w)N_'%s'z frozen_fields = fields_to_modify & set([{frozen_members}]) if frozen_fields: raise AttributeError('Cannot set frozen members %s' % ', '.join(frozen_fields)) , )frozen_members)endswithformatjoin)fr memberss 7/usr/lib/python3/dist-packages/pyrsistent/_immutable.pyfrozen_member_testz%immutable..frozen_member_test4sT.5IC&1*II dii&?@  A Js A A r c3&K|] }d|z yw)rN).0ms r zimmutable..?s;avz;saq class {class_name}(namedtuple('ImmutableBase', [{quoted_members}])): __slots__ = tuple() def __repr__(self): return super({class_name}, self).__repr__().replace('ImmutableBase', self.__class__.__name__) def set(self, **kwargs): if not kwargs: return self fields_to_modify = set(kwargs.keys()) if not fields_to_modify <= {member_set}: raise AttributeError("'%s' is not a member" % ', '.join(fields_to_modify - {member_set})) {frozen_member_test} return self.__class__.__new__(self.__class__, *map(kwargs.pop, [{quoted_members}], self)) z set([%s])zset())quoted_members member_setr class_namer) namedtuplepyrsistent_immutable)r__name__z: N) isinstancestrreplacesplitrr print collectionsrdictexec SyntaxError) rnameverboserrtemplater namespacees ` r immutabler,sZ'3//#s+113 YY;7;;N$ F.:H+6g"4"6  % . h& 5KLI< Xy! T? <#a&5.834!;r0s ]r/