python - 我应该如何根据字典键的存在进行条件分配？

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."

如何用 Python 最好地重写它？我试图避免出现 KeyError。

Answer 1

这个。

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