L. Slicing Values
Python is a zero-indexed language (things start counting from zero), and is also left inclusive, right exclusive you are when specifying a range of values. This applies to objects like lists and Series, where the first element has a position (index) of 0. When creating ranges or slicing a range of values from a list-like object, we need to specify both the beginning index and the ending index. This is where the left inclusive, right exclusive terminology comes into play. The left index will be included in the returned range or slice, but the right index will not.
Think of items in a list-like object as being fenced in. The index represents the fence post. When we specify a range or a slice, we are actually referring to the fence ...
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