Hi everyone,
Just a little curious as to why there need to be two square brackets around the north_america = happiness2015.iloc[[4,14]] instead of just one square bracket? I know it’s a silly question but I keep making this mistake in my code! 
Screen Link:
https://app.dataquest.io/c/60/m/343/data-aggregation/6/exploring-groupby-objects
My Code:
grouped = happiness2015.groupby('Region')
north_america = happiness2015.iloc[4,14]
na_group = grouped.get_group("North America")
equal = north_america == na_group
What I expected to happen:
Correct Output
What actually happened:
IndexError: single positional indexer is out-of-bounds
Thank you!!
Hi h.mojid72
In order to select multiple rows, we have to pass the list labels or indexes. Hence we have to pass [4, 14] to happiness2015.iloc[].
Hope it’s clear now?
Thanks.
Hi everyone ,
I’m not sure as to why i’m getting this error , if someone can help me out it’ll be great!
grouped = happiness2015.groupby(‘Region’)
north_america = happiness2015.iloc[4:15]
na_group = grouped.get_group(‘North America’)
equal = north_america == na_group
link : Learn data science with Python and R projects
Error : ValueError: Can only compare identically-labeled DataFrame objects
Hello
Welcome to the community!
If you run the code grouped.groups, you could see in the output that the for the North America group the indices are 4 and 14.
Hence your code should have been
north_america = happiness2015.iloc[[4, 14]]
instead of
Hope it’s clear now.
Thanks,
Debasmita
