一种常见的python实现枚举方法



class TEnum(object):
    def __init__(self, *argments):
        idx = 0
        for name in arguments:
            if '=' in name:
                name,val = name.rsplit('=', 1)
                if val.isalnum():
                    idx = eval(val)
            setattr(self, name.strip(), idx)
            idx = idx + 1

xyy = TEnum("left", "right=4", "key")

print xyy.left

print xyy.right

print xyy.key