Three. Python data type (a) number and string __python

data type of Python

Introduction: The computer is used to assist people, in the program design also mapped the real world classification, so as to facilitate the abstract analysis

Category: 1. Digital

2. String

3. List

4. META Group

5. Dictionary

1. Number Type

Type	Name	Range
Integral type	Int	-2,147,483,647 to 2,147,483,647
Long Integral type	Long	Infinite. Mandatory type mode: 123L
Floating-point type	Float
Plural type	Complex

2. Strings String

Defined by: Quotation mark double quotation mark same effect

Elements: Alphanumeric symbols (non-special system symbol Collection)

note ; "" "" is a joke "" "" triple quote docstring is usually used to make a string, "" "" "

When quotation marks conflict, the pure symbol uses: \ "

value a[] such as a= "ABCD" takes the value of the first a:a[1]=a # #第一位为0 "

sliced a[:]① complete cut a=[0:4] ABCD

② Single cut A=[2:] CD

③ Solid-length value a=[::2] AC

④ negative take a=[-1] D

     

vice;

Type () function data type query function