You're technically trying to index an uninitialized array. You have to first initialize the outer list with lists before adding items; Python calls this ... ... <看更多>

All are means of accomplishing a similar task: sorting the values in a list or array. For example, a simple selection sort repeatedly finds the minimum value ... ... <看更多>

A list baseball has already been defined in the Python script, representing the ... You're ready to convert the actual MLB data to a 2D `numpy` array now! ... <看更多>