我应该如何基于字典键的存在来有条件地分配？

Question

我有一些像这样的Perl代码：

my $match = $matches{$key}
            ? "$matches{$key} was a match!"
            : "There was no match."

如何在Python中最好地重写？我试图避免得到KeyError。

Answer 1

此。

message = "%s was a match"%(matches[key],) if key in matches else "There was no match."