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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
I'm so sorry, you are correct. I was debugging and added a print statement after converting the times into ints. I copied the output thinking that was the original list.
Fun Kata, good job.
One issue:
Instructions are inaccurate as of the value of songs['playback']. Actual value in the list is an int in seconds (e.g. 317), not a string with minutes and seconds (e.g. "5:17").