IndentationError：需要一个缩进块，但它似乎是正确的

Question

在我提供的代码中有一个

>IndentationError in line 10, or at the END of:

> while ((while_bolian == "") and (correct_count >= 0) and (total_count != 0)) or ((while_bolian == True) and (correct_count >= 0) and (total_count != 0)):

但是我的所有缩进看起来都是正确的，我使用的是 pycharm，如果我将光标放在上面的代码行之后，它会显示 Indent Expected。

我已经对此错误进行了研究，但似乎没有任何帮助解决这个问题。

    total_count = int(input("how many questions do you want to be in the quizz \n10.\n50.\n100.\n:"))
    try:
        while ((while_bolian == "") and (correct_count >= 0) and (total_count != 0)) or ((while_bolian == True) and (correct_count >= 0) and (total_count != 0)):
    except ValueError:
        print("please enter a question limit")

>     line 10
        except ValueError:
        ^
IndentationError: expected an indented block

> Process finished with exit code 1

Answer 1

while 需要像 pass 这样的指令，带有额外的缩进。
现在while 尝试运行except！
参见例如Python syntax for an empty while loop