install

• https://docs.python-guide.org/starting/install3/osx/

data type hierarchy

data-type compare

• data type time complexity

javascript	python	golang
null	None	nil
Uint8ClampedArray	bytes	bytes
Number	int/float	int8/16/32 /float
Array	list	slice,array
object	dict	struct
pyproxy	object	int8/16/32
Paragraph	int	int8/16/32