python - 使用字符串替换打印时出现语法错误

Question

我正在使用此代码来计算我想要打印的准确度分数

accuracy = metrics.accuracy_score(predictions,data[outcome])
print "Accuracy :%s" % "{0:.3%}".format(accuracy)

但是当我运行代码时，出现以下错误。

  File "<ipython-input-53-a86f8606658d>", line 19
    print "Accuracy :%s" % "{0:.3%}".format(accuracy)
                       ^
SyntaxError: invalid syntax

Answer 1

试试这个:

print("Accuracy :{0:.3%}".format(accuracy))

演示:

accuracy = 0.83456789
print("Accuracy :{0:.3%}".format(accuracy))

打印:

Accuracy :83.457%