Python

Python functions:Functions are well-organized, reusable pieces of code that are used to implement a single, or associated function.Functions can improve the modularity of the application, and the reuse of the code. You already know that Python

Python functionsFunction Effect:(1) Code reuse(2) A design tool to decompose complex problems(3) Packaging and parameterization of related functionsFunction Type:Global functions: Defined in the moduleLocal functions: nesting in other

Learning content:JSON module, pickle module, shelve moduleSerialization of JSON modules:1 ImportJson,pickle2 3info={4 'name':'a',5 ' Age': 34,6 'func':"'7 }8With open ('Text.txt','W') as F:9 #f.write (json.dumps (' Test.txt '))

Axis adjustment and scale adjustment see: "Python" pil&plt image Processing _ Matrix conversion & Save diagram sharpness adjustmentData generation:1 import NumPy as NP2 import Matplotlib.pyplot as Plt3 4Func = np.poly1d (Np.array ([1,2,3,4]))5func1 =

Python Tutor can visually display the object reference relationship.URL is http://www.pythontutor.com/visualize.html1) Edit code.2) Run, can see the following interface.This tool is cool and we can clearly see the reference relationship between

One, variable \ character encoding Variables is used to store information to is referenced and manipulated in a computer program. They also provide a labeling data with a descriptive name, so we programs can be understood more clearly by

1. Variables in Python, we don't need to specify a data type for a variable. For example a = 1, so that the variable ABC is the integer type; a = 1.0, then the variable ABC is the floating-point type; a= ' Hello ', then the variable ABC is a string.

FunctionThe function is to encapsulate the code of some payload, call it directly when needed, reuse it to improve efficiency and simplify the structure of the program.1. SyntaxDefine a function to use the DEF statement, write down the function

Data types in PythonDirectory1. String2. Boolean type3, Integer4. Floating point number5. Digital6. List7, meta-group8. Dictionaries9. Date1. String (http://www.cnblogs.com/yjd_hycf_space/p/6846284.html)1.1. How to use strings in PythonA, use single

Before learning Django , found that its model layer is very useful, the operation of the database map to the operation of classes, objects, to avoid the direct write in the Web project SQL statement, at that time, If this model layer can be used

First, quotation marks and comments:1. In Python, single quotation marks ("") and double quotation marks ("") are not distinguished, and both single and double quotation marks can be used to identify a string. Print ("Hello") rint (' Hello

Here's a small piece to bring a Python update all installed package implementations by PIP. Small series feel very good, now share to everyone, also for everyone to make a reference. Let's take a look at it with a little knitting. The newer PIP

This article mainly introduced the Python yield use method analysis, small series thought quite good, now shares to everybody, also gives everybody to make a reference. Let's take a look at it with a little knitting. How to generate Fibonacci

Command-line arguments are obtained through sys.argv[], and sys.argv[0] is the path to the code file itself, so the parameters start at 1. For example, the setting parameter is: SPE Python code: Code highlighting produced by Actipro

This time the main learning to replace a variety of labels, standardized format method. Still refer to blogger Cia Qingcai's Blog.1. Get the URLA post: https://tieba.baidu.com/p/3138733512?see_lz=1&pn=1Where https://tieba.baidu.com/p/3138733512? is

names = [1,2,3,"lingyul",' Panyang ']#定义列表, Use []Print (names)#取列表的值Print (names[3])#t通过下标取值, Use []names[0] =' Zhangsan '#列表是可变变量, the values of the list can be modified by subscriptFor nameIn Names:#循环列表取值 Print (name)#列表的增, delete, change, Check#

Day4 use yield to implement a single thread, day4yield I. yield generator (yield) Yield is used to end the while loop and maintain the state of the previous loop. During the next call, it runs directly from yield, executes the program after yield,

Differences and usage of send and sendall in python socket Functions In python socket programming, there are two TCP sending functions: send () and sendall (). The differences are as follows: Socket. send (string [, flags])Send TCP data and return

Python implements the Chinese sorting method, This example describes how to sort Chinese Characters in Python. We will share this with you for your reference. The details are as follows: Python is an hour-long string, based on the encoding value

Python crawler: Something you should know before learning crawler, python Crawler This is the 14th article on Python, which mainly introduces the principles of crawlers. When it comes to crawlers, we have to talk about web pages, because the