带连字符的python关键字参数

Question

我有一个关键字参数函数:

def f1(**kw):
    for key,val in kw.iteritems():
        print "key=%s val=%s" % (key,val)

f1(Attr1 = "Val1", Attr2 = "Val2")  # works fine.

f1(Attr1-SubAttr = "Val1", Attr2 = "Val2")  # complains about keyword being an expression.

f1("Attr1-SubAttr" = "Val1", Attr2 = "Val2")  # doesn't work either.

如何使用连字符传递关键字？我无法控制这些关键字,因为我正在从现有的旧数据库中解析这些关键字.

谢谢!-kumar

Answer 1

关键字参数必须是有效的Python标识符 ; 这些不允许-为减法保留.

您可以使用**kwargsvariable关键字参数语法传递任意字符串:

f1(**{"Attr1-SubAttr": "Val1", "Attr2": "Val2"})