Can't handle with ValueError: invalid literal for int() with base 10: 'H'

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#1

Hi, I got stuck here and I can’t find any solution to handle the problem. I tried to implement solutions from https://community.dataquest.io/t/guided-project-exploring-hacker-news-posts/8764/4;

My Code:

total_ask_comments = 0 

for row in ask_posts: 
    total_ask_comments += int(row[4])
    
avg_ask_comments = sum(total_ask_comments) / len(ask_posts)
print(avg_ask_comments)

total_show_comments = 0 

for row in show_posts:
    total_show_comments += int(row[4])
    
avg_show_comments = sum(total_show_comments) / len(show_posts)
print(avg_show_comments)

What actually happened:

      3 for row in ask_posts:
----> 4     total_ask_comments += int(row[4])
      5 
      6 avg_ask_comments = sum(total_ask_comments) / len(ask_posts)

ValueError: invalid literal for int() with base 10: 'H'
#2

Hello @gera333, welcome to the community.,

This error message seems to indicate that you are passing a string that’s not an integer to the int() function. Therefore, I suppose the problem is not in the code you posted but in the code you used to get to the ask_posts list. Can you post the code you used before the code you posted?

1 Like
#4

I just deleted [1] from ask_posts.append(row[1]) and etc. and it helped
I hope if somebody will stuck there with the same issue it would help you.

So the final solution could be:

ask_posts = []
show_posts = [] 
other_posts = []

for row in hn:
    title = row[1]
    if title.lower().startswith("ask hn"): 
        ask_posts.append(row)
    elif title.lower().startswith("show hn"):
        show_posts.append(row)
    else: 
        other_posts.append(row)

And then:

total_ask_comments = 0 

for row in ask_posts: 
    total_ask_comments += int(row[4])
    
avg_ask_comments = (total_ask_comments) / len(ask_posts)
print(avg_ask_comments)

total_show_comments = 0 

for row in show_posts:
    total_show_comments += int(row[4])
    
avg_show_comments = (total_show_comments) / len(show_posts)
print(avg_show_comments)

Result: 14.038417431192661
10.31669535283993

1 Like
#5

As I thought the problem was in how you got the ask_posts list.

Good job finding the solution!

1 Like