Python

List:Basic format: variable name = [element 1, Element 2, Element 3]Create: A = [' Visitor ', ' admin ', 19] or A = List ([' Armin ', ' admin ', 19]), which prefers to convert to a list of functions.Directly define the first kind.In judgment: If

Data type: View variable data types type (variable) or print (type (variable))integer int : A natural number without decimals, also called an integral type. In the 2. The x version is also divided into long integers and shaping. But in 3. Unity in

Write your own code to calculate the AUC, using Scikit-learn's AUC to calculate the function sklearn.metrics. auc (x, y, reorder=false) Do some tests, the result is the same, if there are errors, please correct me.Idea: 1. First sort the predicted

#!/usr/bin/python#-*-Coding:utf-8-*-# example 3:IF statement multiple conditionsNum= 9IfNum>= 0 andNum 10: # Determine if the value is between 0~10 Print ' Hello '>>>Hello# Output ResultsNum= 10IfNum 0 OrNum> 10: # Determine if the value is less

#!/usr/bin/env python#-*-Coding:utf-8-*-# Author:changhua Gongclass Person (object):def __init__ (self, name):Self.name = name # static propertyDef say (self): # method, dynamic propertyPrint ("Say ...")def speak (self):Print ("Speak ...")Class

syntax and writing of functions:function Syntax:def functionname (parameter 1, parameter 2,......): function body (the function statement you want to implement)Return[expression] #不带表达式的return相当于返回NoneFunction name Command rule:Lowercase letters,

In the browsing of other people's blog when learning the random module, preface self-practice, write a random generation of the specified length of the password string function, come out for your reference:Nonsense not much to say, on the

1. Concept:Interface testing is a test of the interface between components of a test system. Interface testing is primarily used to detect the interaction points between external systems and systems, as well as within each subsystem. The focus of

A. Module1 What is a module?A module is a file that contains the Python definition and declaration, and the filename is the suffix of the module name plus the. Py. 2 Why do I use modules?If you quit the Python interpreter and then re-enter, then the

Four: Python http of the interface RequestThe power of Python is that it provides a lot of standard libraries and third libraries, and this article introduces Urlliband the third library of requests.Urllib defines a number of functions and classes

1 classVertice:2 def __init__(Self,index):3self.no =Index4Self.color = 0#0:white 1 Gray 2 black5SELF.VT =06 defGetnextv (self):7 returnSELF.NEXTV8 defSETNEXTV (self,*nextvertice):9SELF.NEXTV =NextverticeTen defSetColor (self,color):

Process-oriented approach#!/usr/bin/env python#-*-coding:utf-8-*-ImportUrllib2ImportSYSImportReImportOSType=sys.getfilesystemencoding ()if __name__=='__main__': #1. Access one of the Web addresses to get the Web page source codeURL

According to My learning experience, I summed up the following 10 points to share with you:1) The first step in learning Python. is to immediately download a Python version number on the www.python.org site. I recommend that people who have just

Today, inadvertently found a known open source Crawler, is based on Python, named Zhihu_oauth, looked at GitHub above the star number is quite a lot of, seemingly document also quite detailed, so a little research. I found it very useful. Just here

Python uses an exception object to represent an exception condition. An exception is thrown when an error is encountered. If the exception object is not handled or captured, the program uses so-called backtracking to abort execution. Sometimes we do

Closures are based on different configuration information to obtain different results. The following through this article to share the Python closure of two notes, the need for a friend reference What is a closure package? Simply put, closures are

This article mainly introduces the Python iterator and the ITER () function in detail and examples of relevant information, the need for friends can refer to the following Python in Iterators and ITER () functions Iterators provide an interface

This article mainly summarizes the Python3 set (set) of the syntax of the relevant data, the text gives a detailed example code, for everyone has a certain reference value, the need for friends below to see it together. Introduced Set Gu Ming, is a

Python magic method summary and precautions, python magic Summary 1. What is magic: In Python, the meanings of functions and methods must be separated; 1. function: defined externally by the class and has no direct relationship with the class. Form:

Day5 time complexity, day5 Time Complexity (1)Time Frequency The time it takes to execute an algorithm cannot be calculated theoretically. You must run the test on the computer before you can understand it. However, we cannot and do not need to