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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.
Your genius was clean cut by the float type ahaha
You don't trust the built-in value of pi which is the most accurate float value possible for pi. But you still convert it to a float to lose all the precision you wanted and get something no better than math.pi.
You can use fractions.Decimal instead of float if you want more precision.
But you are ending up rounding the result to 2 decimals anyways.