我在哪里弄乱输出格式？

Question

So I got an error message when I tried to run my code and I can't figure out what exactly the problem is. It says it's a ValueError but I can't figure out which one exactly. Maybe it's just late, but I am at a loss.

Here's my code:

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

Here's my output and error when I run it:

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

What am I messing up? Any and all help is appreciated!

Answer 1

You can't switch back and forth between automatic field numbering - what you get by specifying a simple {} - and manual field specification, eg {0} . If you want the same field repeated several times, as 'Word' is in your example, you'll have to also specify what you want the other fields to be. For example, you might want to start with the first argument, 'Word' , which is element 0 , and the fifth argument, '='*51 , as the last, which is element 4 :

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

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

You'll have to decide for yourself which arguments you want to be placed where in the format string.