Question

嘿，所以我要通过学校使用的代码作业网站提交代码，由于某种原因，这表示我的行距与金额之间存在问题，如下面的屏幕截图所示，左边的输出是预期的，右边的输出是我得到的。我执行此操作的代码有什么问题？同样在每个输出的末尾，它还会打印“无”。为什么？

Answer 1

一个问题是您的 thank_donor 函数返回了 print 函数，然后又在那儿调用了 print 函数。您希望函数仅返回纯字符串，然后可以打印。

Answer 2

def thank_donor(first_name, last_name, amount, donor_status):
    """prints thank you note with variables in"""

    last = last_name.upper() 
    first = first_name.capitalize()         
    return print(
        "----------------------------------------" +
        "\n" +
        "Note to donor:", last + ",", first +
        "\n" + 
        "----------------------------------------" +
        "\n" + 
        "Dear", first + "," + 
        "\n" + 
        "Thank you for your donation of", "$" +  "{:.2f}".format(amount),
        "\n" +
        "to our album campaign." +
        "\n" + 
        "This makes you a", donor_status, "member." 
         "\n" + 
        "ROCK ON," +
        "\n" +  
        "Blink 992" + 
        "\n" + 
        "========================================")

thank_donor("joe", "bloggs", 100, "Bronze")

尝试此代码。问题是您在最后打印none。发生这种情况是因为您要将print函数返回到另一个print函数，即print(print(#something#)。只需删除任何print条语句即可。

Answer 3

def thank_donor(first_name, last_name, amount, donor_status):
    """prints thank you note with variables in"""


    last = last_name.upper() 
    first = first_name.capitalize() 



    print(
        "----------------------------------------" +
        "\n" +

        "Note to donor:", last + ",", first +

        "\n" + 

        "----------------------------------------" +
        "\n" + 

        "Dear", first + "," +

在这里，请不要在“ {:. 2f}”。format（amount）的末尾使用“，” ，因为这会导致空格，而是使用“ +” 。

        "\n" + 
        "Thank you for your donation of", "$" +  "{:.2f}".format(amount) +
        "\n" +
        "to our album campaign." +

        "\n" + 

        "This makes you a", donor_status, "member." 
        "\n" + 

        "ROCK ON," +
        "\n" +  
        "Blink 992" + 

        "\n" + 


        "========================================")

在函数中以及在调用函数时，请勿多次使用打印函数。

thank_donor("joe", "bloggs", 100, "Bronze")

行尾的视在空间

3 个答案: