Exploring Hacker News Posts: Step 5

Q&A DQ Courses
#1

Screen Link:

My Code: 

import datetime as dt
result_list=[]
for row in ask_posts:
    created_at=row[6]
    list_1=[]
    list_1.append(created_at)
    num_comments=int(row[4])
    list_2=[]
    list_2.append(num_comments)
    result_list.append(list(zip(list_1,list_2)))

counts_by_hour={}
comments_by_hour={}
for item in result_list:
    time=item[0]
    d_ob=dt.datetime.strptime(time,"%m/%d/%Y %H:%M").strftime("%H")
    if ob_hour not in counts_by_hour:
        counts_by_hour[ob_hour]=1
        comments_by_hour[ob_hour]=result_list[1]
    else:
        counts_by_hour[ob_hour]+=1
        comments_by_hour[ob_hour]+=result_list[1]

What I expected to happen:

To get two dictionaries recording the amount of ask posts created per hour, along with the total amount of comments.

What actually happened:

TypeErrorTraceback (most recent call last)
<ipython-input-38-fb699dc88845> in <module>()
     14 for item in result_list:
     15     time=item[0]
---> 16     d_ob=dt.datetime.strptime(time,"%m/%d/%Y %H:%M").strftime("%H")
     17     if ob_hour not in counts_by_hour:
     18         counts_by_hour[ob_hour]=1

TypeError: must be str, not tuple
#2

Please make sure to share the direct link to the Mission Step as well.

#3

Do check these lines of code. Maybe you want to think again what all variables do you really want to append to this list result_list. For that do you need to create list_1 and list_2 or two variables can do their job? If you think in those lines, you will probably able to sort it out by yourself.