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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.
Not an issue
I am working on it
This comment is hidden because it contains spoiler information about the solution
intial test case works but submit sample test case doesnt match proper type argument ...showing error
Traceback:
in
in swap
TypeError: format expects arg 2 to be string or unicode, not int
len function takes list as argument.Check what is the type of argument you have mentioned in len function