原文链接：stackoverflow.com
Usually, you can do this using the QMetaObject:
在QT中通常使用QMetaObject和QMetaEnum完成这一操作：
mo = QtGui.QFrame.staticMetaObject
QMetaEnum me = mo.enumerator(mo.indexOfEnumerator('Shadow'))
me.valueToKey(QtGui.QFrame.Sunken)
输出： Sunken
然而，pyqt中的枚举没有暴露元对象，所以必须通过在Python中遍历枚举的属性来做到这一点（幸运的是PyQt枚举是int的子类，因此可以通过isinstance来识别）：
However it appears that QPrinter hasn’t exposed a meta object, so you’ll have to do it by walking QPrinter’s attributes in Python (fortunately PyQt enums are subclasses of int, so can be identified by isinstance):
page_sizes = dict((n, x) for x, n in vars(QtGui.QPrinter).items() if
isinstance(n, QtGui.QPrinter.PageSize))
print(page_sizes[QtGui.QPrinter.A4])
或 page_sizes[0]
或 page_sizes['A4']
输出： A4