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It's called list slicing and returns a slice of the original list. The notation is [start_index:end_index:step]. Step defaults to 1. Both start_index and end_index can be omited, which will make them default to beggining and end of a list. Can be used with strings as well. You can use negative values to count from the end of a list (-1), as well as negative step to reverse the list.
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So Good !!! Can you please explain the "[:i]" in the end...? Is it to just accept the first i entries?
It's called list slicing and returns a slice of the original list. The notation is [start_index:end_index:step]. Step defaults to 1. Both start_index and end_index can be omited, which will make them default to beggining and end of a list. Can be used with strings as well. You can use negative values to count from the end of a list (-1), as well as negative step to reverse the list.