python study notes eight (boolean value to NULL, list)

Boolean value : A Boolean value True and False only two kinds of value
null : python is a special value, represented by None; None not be interpreted as 0, because 0 is meaningful, and None is a special value.
List :
Create a list
format: [list = name list of options Option 1. List 2. List option 3, ..., n] list of options
eg: create an empty list

to create a list with elements

Note: The list of elements is not required the same type (data elements of the list can be different types)

access list element
argument
format: name list [index]
Note: Do not cross-border (subscript is beyond the range indicated)

a list of the operation
list in the combo

repeat list

determination element whether in the list

list intercept

two-dimensional list : the list of elements for the list too