Python

#!/usr/bin/env python#-*-coding:utf-8-*-# @Time: 2017/11/20 16:03# @Author: lijunjiang# @File: Demo.pyimport MyS qldb# Connection Database # Host database ip# Port database Listener # User Database user # passwd users password # DB database name #

There are two ways to create an array, 1. Direct assignment 2. Generation of random variablesrandom generation includes 4 types: Np.arange, Np.linspace (0,10,5), Np.logspace (0,2,5), Np.random.random (3,2,3)Np.arange (10,20,2) # #左闭右开区间, start value,

About Object iterable and iterator objects that can be iterated iteratorAn iterative object: An object that can act directly on a for loop is called an iterative object: Iterable. An iterative object contains an __iter__ method, or __getitem__

List Introduction Basics Use square brackets [] to represent the list, separated by commas Print (list name) prints the internal contents of the list, including the square brackets and the quotation marks of the strings Access the

Directory:First, variable and constantSecond, character encodingThird, user interaction programIv. if Else statementV. CirculationVi. initial knowledge of the moduleVii. What is PYC?Viii. data types and data operationsIx. bytes Data Types10 or three-

1, A=a+2, represents a new object, the new object name is still a, but the point of memory address has changed>>> a=2>>> ID (a)140406287260016>>> a=a+2>>> a4> >> ID (a)140406287259968So you can do this for a tuple object (immutable object).>>> tuple1

is a simple illustration of the Hanoi game, we want to move the top of the x column above the z axis (Hanoi game rules can be self-search, here do not introduce)The Tkinter and Scrolledtext modules need to be introduced, and the code below is

This article will cover: Resource detection A useful dictionary resource First violent detector. Resource detectionResource detection is a resource mapping and information collection phase in penetration testing.There are three

identifiers The first character must be a letter in the alphabet or an underscore ' _ '. The other parts of the identifier are composed of letters, numbers, and underscores. Identifiers are case sensitive. Can exist in Chinese

Draw a square with a side length of R and a circle with a radius of R of One-fourth (as shown), throw darts at random, and calculate the π value by calculating the proportion of darts falling in the star area and the whole area.The formula is

Monitoring Server StatusGet System Performance Information1, CPU information:The Linux operating system uses several parts of the CPU:User time; SystemTime; Wait Io;idlePsutil.cpu_times ()Psutil.cpu_times (). UserPsutil.cpu_count ()2 , Memory

The difference between programs, processes, and threadscomputer programs are binary data (or other types) that are executable on disk and they only start their life cycle when they are read into memory by the operating system.A process is an

Learn some new knowledge about the Python list, self-organized, convenient for everyone to refer to:# !/usr/bin/env python # _*_ coding:utf-8 _*_ # File_type: List of common methods of operation, and some commonly used functions #

Reprinted from: http://www.jianshu.com/p/8dbdfbd3716dI. Pyinstaller INTRODUCTIONPyinstaller a Python script into an executable program that runs on a machine without a python environmentThe latest version is Pyinstaller 3.1.1. Support python2.7 and

From configparser import configparserfp = ' Conf.ini ' #定义配置文件名conf = Configparser () #实例化conf. Read (FP) # Open Confcon F.add_section (' Section1 ') #添加conf节点conf. Set (' Section1 ', ' name ', ' Jack ') #添加值conf. Set (' Section1 ', ' age ', ' 23 ')

Python at the time of installation, the default encoding is ASCII, when the program is non-ASCII encoding, Python processing often reported such a mistake, Python can not handle non-ASCII encoding, you need to set the default Python code, The

It was supposed to be done by a Browsercookie library, but at first glance it had a lot of problems: You cannot specify the Firefox profile you want to use (later found you can specify a database file). A line of information is printed

The datetime module in Python works well, providing a function for converting date formats and string formats to each other Strftime/strptime1. A function converted from a date format to a string format is: Datetime.datetime.strftime ()2. The

Python computer visual code and python visual code   Before you begin, explain the development environment. My personal experience is that, due to version compatibility problems, learning Python often encounters Inexplicable

Python uses virtual environment, python Virtual Environment   Imagine the requirement. To write a series of 1.0 plug-ins used by a project, we need to use 2.0 for a new project. What should we do? Are all updated to version 2.0? In this way, the