C///

\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// """Enumeration metaclass. XXX This is very much a work in progress. """ import string class EnumMetaClass: """Metaclass for enumeration. To define your own enumeration, do something like class Color(Enum): red = 1 green = 2 blue = 3 Now, Color.red, Color.green and Color.blue behave totally different: they are enumerated values, not integers. Enumerations cannot be instantiated; however they can be subclassed. """ def __init__(self, name, bases, dict): """Constructor -- create an enumeration. Called at the end of the class statement. The arguments are the name of the new class, a tuple containing the base classes, and a dictionary containing everything that was entered in the class' namespace during execution of the class statement. In the above example, it would be {'red': 1, 'green': 2, 'blue': 3}. """ for base in bases: if base.__class__ is not EnumMetaClass: raise TypeError, "Enumeration base class must be enumeration" bases = filter(lambda x: x is not Enum, bases) self.__name__ = name self.__bases__ = bases self.__dict = {} for key, value in dict.items(): self.__dict[key] = EnumInstance(name, key, value) def __getattr__(self, name): """Return an enumeration value. For example, Color.red returns the value corresponding to red. XXX Perhaps the values should be created in the constructor? This looks in the class dictionary and if it is not found there asks the base classes. The special attribute __members__ returns the list of names defined in this class (it does not merge in the names defined in base classes). """ if name == '__members__': return self.__dict.keys() try: return self.__dict[name] except KeyError: for base in self.__bases__: try: return getattr(base, name) except AttributeError: continue raise AttributeError, name def __repr__(self): s = self.__name__ if self.__bases__: s = s + '(' + string.join(map(lambda x: x.__name__, self.__bases__), ", ") + ')' if self.__dict: list = [] for key, value in self.__dict.items(): list.append("%s: %s" % (key, int(value))) s = "%s: {%s}" % (s, string.join(list, ", ")) return s class