我在哪里弄乱了输出格式？

因此，当我尝试运行代码时收到一条错误消息，但我无法弄清楚问题到底是什么。它说这是一个 ValueError 但我不知道到底是哪一个。也许只是迟到了，但我却不知所措。

这是我的代码：

def sort(count_dict, avg_scores_dict, std_dev_dict):
    '''sorts and prints the output'''
    menu = menu_validate("You must choose one of the valid choices of 1, 2, 3, 4 \n        Sort Options\n    1. Sort by Avg Ascending\n    2. Sort by Avg Descending\n    3. Sort by Std Deviation Ascending\n    4. Sort by Std Deviation Descending", 1, 4)
    print ("{}{0:27}{0:39}{0:51}\n{}".format("Word", "Occurence", "Avg. Score", "Std. Dev.", "="*51))

    if menu == 1:       
        dic = OrderedDict(sorted(word_average_dict.items(), key=lambda x:x[1], reverse=False))
        for key in dic:
            print ("{}{0:27}{0:39:.4f}{0:51:.4f}".format(key, count_dict[key], avg_scores_dict[key], std_dev_dict[key]))
    elif menu == 2:
        dic = OrderedDict(sorted(word_average_dict.items(), key=lambda x:x[1], reverse=True))
        for key in dic:
            print ("{}{0:27}{0:39:.4f}{0:51:.4f}".format(key, count_dict[key], avg_scores_dict[key], std_dev_dict[key]))
    elif menu == 3:
        dic = OrderedDict(sorted(std_dev_dict.items(), key=lambda x:x[1], reverse=False))
        for key in dic:
            print ("{}{0:27}{0:39:.4f}{0:51:.4f}".format(key, count_dict[key], avg_scores_dict[key], std_dev_dict[key]))
    elif menu == 4:
        dic = OrderedDict(sorted(std_dev_dict.items(), key=lambda x:x[1], reverse=True))
        for key in dic:
            print ("{}{0:27}{0:39:.4f}{0:51:.4f}".format(key, count_dict[key], avg_scores_dict[key], std_dev_dict[key]))

    return None

这是我运行时的输出和错误：

You must choose one of the valid choices of 1, 2, 3, 4 
        Sort Options
    1. Sort by Avg Ascending
    2. Sort by Avg Descending
    3. Sort by Std Deviation Ascending
    4. Sort by Std Deviation Descending1
Traceback (most recent call last):
  File "C:\Users\Ryan\Documents\Program 7\Program 7.py", line 161, in <module>
    output = sort(cnt_dict, word_avg_dict, std_dev_dict)
  File "C:\Users\Ryan\Documents\Program 7\Program 7.py", line 99, in sort
    print ("{}{0:27}{0:39}{0:51}\n{}".format("Word", "Occurence", "Avg. Score", "Std. Dev.", "="*51))
ValueError: cannot switch from automatic field numbering to manual field specification

我搞砸了什么？感谢任何和所有的帮助！

您无法在自动字段编号之间来回切换 - 通过指定一个简单的字段编号可以获得什么{}- 和手动字段规范，例如{0}。如果您希望同一字段重复多次，例如'Word'在您的示例中，您还必须指定其他字段的内容。例如，您可能想从第一个参数开始，'Word'，这是元素0，以及第五个参数，'='*51，作为最后一个，它是元素4:

>>> print("{0}{0:27}{0:39}{0:51}\n{4}".format("Word", "Occurence", "Avg. Score", "Std. Dev.", "="*51))
WordWord                       Word                                   Word

===================================================

您必须自己决定将哪些参数放置在格式字符串中的位置。