# -*- coding: utf-8 -*- Specify the file encoding as utf-8

Machine learning third-party library tensorflow keras mxnet

Web application framework third-party library Pylons

os module

help(request) help function

dir(p_object) gets the name list of all methods and attributes in the p_object object

Data container.sort(key,reverse=False) specifies the sorting rule for sorting

Some common built-in functions

Use of map(func,iterable) mapping function

Use of filter(func,iterable) filter function

Use of eval() function

Use of join() string splicing function

Conversion of Json data format

Use of format formatting characters

Use of random module

Use of jieba Chinese segmentation library

1. literal

2. Comment

3. variable

4. type of data

5. Data type conversion

6. identifier

7. operator

8. Three ways to define strings

9. String concatenation ( )

10. String formatting

11. print(str,end=" ") data output statement

12. input() data input statement, returns the input string

1. Boolean types and comparison operators

2. Basic format of if statement

3. if else combined judgment statement

4. if elif else multi-condition judgment statement

5. if x in sequence determines whether x is in the sequence

6. Nesting of judgment statements

1. while loop basic syntax

2. Nested application of while loop

3. Basic syntax of for loop

4. range statement obtains a simple sequence of numbers

5. Nested use of for loops

6. continue and break

1. Function introduction

2. Basic definition syntax of functions

3. function parameters passed in

4. function return value

5. Function documentation

6. Nested function calls

7. variable scope

1. Understand data containers

2. list(list)

3. tuple(tuple)

4. str(string)

5. Slices of data containers (sequences)

6. set(set)

7. dict(dictionary)

8. Comparative summary of data containers

9. Common operations for data containers

1. Function multiple return values

2. Various ways of passing parameters to functions

3. anonymous function

1. File encoding concept

2. The open(filename, mode, encoding) function opens a file

3. Read file contents

4. File object.close() method closes the file object

5. with open() as f: syntax automatically closes the file

6. File object.write(string) method writes string to file

7. File object.seek(offset,whence) method is used to move the position of the pointer

1. abnormal

2. module

3. Bag

1. initial object

2. class member methods

3. classes and objects

4. __init__() constructor

5. Other built-in methods (magic methods)

6. encapsulation

7. inherit

8. type annotation

9. Polymorphism

10. Comprehensive case

turtle.Turtle() method creates a Turtle object

Commonly used functions in turtle library

canvas

1. Database introduction

2. MySQL installation and getting started

3. SQL Basics

4. SQL-DDL data definition

5. SQL-DML data manipulation

6. SQL-DQL data query

7. python operation-MySQL basic usage

8. Comprehensive case

1. Introduction

2. Basic preparation

3. data input

4. Data calculation

5. data output

6. Comprehensive case

1. Dynamic bar chart

2. Map visualization

3. Development of line charts

4. Global configuration options

5. Common objects

6. Conversion of Json data format

7. Introduction to the module of pyecharts

1. Closure

2. Decorator

3. Design Patterns

4. Multithreading

5. network programming

6. regular expression

7. recursion