範囲

extension Range: TensorRangeExpression where Bound == Int
extension Range where Bound == Int
extension Range : PythonConvertible where Bound : PythonConvertible
extension Range : ConvertibleFromPython where Bound : ConvertibleFromPython
`Bound` == `Int` の場合に利用可能
`Bound` : `PythonConvertible` で利用可能
`Bound` : `ConvertibleFromPython` で利用可能