Python issue - Data science - Help is needed

[yovel]

best_5 = sorted_swap[:4] 
for row in best_5:
    hour = row[1]
    hour = dt.datetime.strptime(hour, '%H')
    hour = hour.strftime('%H')
    average = row[0]
    print(type(average))
    string = "{a} {c:.2f} average comments per post"
    for_final = string.format(a=average, c=hour)
    print(for_final)

This is the full list

Output:
[[38.5948275862069, '15'], [23.810344827586206, '02'], [21.525, '20'], [16.796296296296298, '16'], [16.009174311926607, '21'], [14.741176470588234, '13'], [13.440677966101696, '10'], [13.24074074074074, '18'], [13.233644859813085, '14'], [11.46, '17'], [11.383333333333333, '01'], [11.051724137931034, '11'], [10.8, '19'], [10.25, '08'], [10.08695652173913, '05'], [9.41095890410959, '12'], [9.022727272727273, '06'], [8.12962962962963, '00'], [7.985294117647059, '23'], [7.852941176470588, '07'], [7.796296296296297, '03'], [7.170212765957447, '04'], [6.746478873239437, '22'], [5.5777777777777775, '09']]

Hi so in general i want to understand what is the issue in those lines of codes
---------------------------------------------------------------------------

Error:
ValueError                                Traceback (most recent call last)
<ipython-input-8-9994e6baa044> in <module>
     10     print(type(average))
     11     string = "{a} {c:.2f} average comments per post"
---> 12     for_final = string.format(a=average, c=hour)
     13     print(for_final)

ValueError: Unknown format code 'f' for object of type 'str'

Thanks

buran write Jul-29-2021, 02:37 PM:
Please, use proper tags when post code, traceback, output, etc. This time I have added tags for you.
See BBcode help for more info.

[buran]

The problem is that hour is string and you use f (i.e. float number). I guess you want to do "{c} {a:.2f} average comments per post" instead

also, don't use string as name, it's built-in module.
also, best_5 will hold only four elements, not 5
finally, your code can be simplified

for comments, hour in sorted_swap[:5]: # I guess you can simply use sorted instead of custom sort function
    print(f"{hour} {comments:.2f} average comments per post")

[yovel]

THANKS!
This is the things which your mind is overwhelmed with the learning etc and it dont get it where is the issue which was in front my eyes

regarding the :[4 i guess i thought on the [1:] so i thought like here in the 1 example it includes the 1 so for the 4 it will include as well so i guess its not the same

So now its working good thanks bro!

15:00 38.59 average comments per post
<class 'float'>
02:00 23.81 average comments per post
<class 'float'>
20:00 21.52 average comments per post
<class 'float'>
16:00 16.80 average comments per post
<class 'float'>
21:00 16.01 average comments per post

and in the self learning platform they didn't mentioned the f thing you did in the print (this is where i guess i need to understand the learning wont be perfect unless i will make some serious course online of data science or python etc..

Im new to this "Arena" almost a month

the platform im using right now is Data quest which to be honest is good except sometime the explanation isn't the best but 80% of the time they are fine

So i added the %M to the hour i didnt know i can add it even if it's not exist in the strptime format

Anyway thank and i appreciate your explanation as well the fast response since im waiting a day to solve it and i wanted to continue with the learning