def get_key(fingerprint, secret = false)
      rkey = []
      err = GPGME::gpgme_get_key(self, fingerprint, rkey, secret ? 1 : 0)
      exc = GPGME::error_to_exception(err)
      raise exc if exc
      rkey[0]
    end
def get_key(fingerprint, secret = false)
      rkey = []
      err = GPGME::gpgme_get_key(self, fingerprint, rkey, secret ? 1 : 0)
      exc = GPGME::error_to_exception(err)
      raise exc if exc
      rkey[0]
    end
Get the key with the +fingerprint+.
 If +secret+ is +true+, secret key is returned.