Python Learning Path Basics (III.)

A brief review of the last course content

Main content: Str|list|dict Class---objects

Specific content can be consulted:

Http://www.cnblogs.com/wupeiqi/articles/5433925.html
Http://www.cnblogs.com/wupeiqi/articles/5444685.html

Second, Python follow-up learning methods: First organize the course content to blog, and then write homework

Iii. contents of the course

1. Data type-set

Summary:

Differences between list and set set (small knowledge points):
List: ordered repeatable nested
Set set: unordered, non-repeating sequence

Introduction of Set Set:

Creation of lists

Method One: List ((+))
Method Two: List1 = (1,2,3,4)

Similarly, there are two ways to create a set set

The study of set set is mainly from two aspects.

1.1 How to create a collection set

Method One: s = {1,2,3,4}
Method Two: List1 = [1,2,3,4]
S1 = Set{list1}
Small knowledge Point: Empty collection S2 = {}

s = {1,2,3}print (S,type (s)) List1 = [1,2,3,4]S1 = set (list1) print (S1,type (s1)) S2 = set () print (S2,type (S2))

The results of the program run as follows:

{1, 2, 3} <class ' Set ' >{1, 2, 3, 4} <class ' Set ' >set () <class ' Set ' >

　　

1.2 Operation set

　　

2. Functions

1.1 Custom Functions
1.2 Built-in functions

3. File operation
3.1 Open File
3.2 Operating files
3.3 Closing files

Python Learning Path Basics (III.)