Python

The essence of Function nameThe function name is essentially the memory address of the function.1, can be used as a value or variable referencedef func (): print (111) print (func) #--function in memory address F = Func # Pass it to the

#!usr/bin/env python#-*-coding:utf-8-*-# author:zhuyuzhe ' ' Shopping applet user starts by entering funds before user starts the program and prints the product list iphone 4999mac 9999 allow users to choose the purchase of goods allows users to

If multiple functions want to implement different functions through an adorner, you can pass parameters to the adorner, allowing the function in the adorner to judge the parameters to achieve different functions.#-*-Coding:utf-8-*-__author__ = "MuT6

#字符串格式化s= "{Name} is {SS}"l={' name ': ' Gao ', ' ss ': ' Mei '}S1=s.format (**L)Print (S1)S= "{0} is {1}"l1=[' Gao ', "Mei"]S1=s.format (*L1)Print (S1)#传统的s= "{Name} is {SS}"S1=s.format (name= ' Gao ', ss= ' Mei ')Print (S1)S= "{0} is

The configuration about Python1,Before the installation of a 2.7, unfortunately, immediately after the proposal to see the predecessors: Novice should learn 3 x, 3 and 2 is incompatible, everything to 3 development, so, decisively abandon 2, start

Regular expressions that can fetch dataThe match is greedy, and the match is more.>>> Import re>>> s= "I am years old">>> Re.search (r "\d+", s)>>> Re.search (r "\d+", s). Group ()' 19 '>>>>>> s= "I am years 30">>> Re.findall (r "\d", s)[' 1 ', ' 9 '

Python contains a set of try: Error handling mechanism of except...finallyPython built-in try...except...finally to handle errors is very convenient. When an error occurs, it is critical to parse the error message and locate the code location where

The code is as followspeople={' Alice ': {' Phone ': ' 2341 ',' Addr ': ' Foo drive 23 '},' Beth ': {' Phone ': ' 9102 ',' Addr ': ' Bar Street 42 '},' Cecil ': {' Phone ': ' 3158 ',' Addr ': ' Baz Avenue 90 '}}labels={' Phone ': ' Phone number ','

The "list () method is used to convert the tuple to a list. The reverse () function is used to reverse the elements in the list. The sort () function is used to sort the original list, and if a parameter is specified, the comparison function

Python determines whether the list is empty in the following two ways:Way One:1 list_temp = []2if len (list_temp):3 # The existence value is True 4Else:5 # list_temp is emptyWay two:1 list_temp = []2if list_temp:3 # The existence

There is a problem: txt can only be English as long as there is a problem in the Chinese language, it is definitely a coding problem, but this problem I did not find the reason to studySensitive word text file Filtered_words.txt, the content is the

ReferenceImport Cv2import NumPy Create a camera objectCap = Cv2. Videocapture ("Videotest/test1.mp4") #参数为视频文件目录Frames-by-frame display for video playbackWhile 1: ret, frame = Cap.read () #读取 cv2.imshow ("Capture", frame) #显示 if Cv2.waitkey

Operating System History:The earliest computers did not have the concept of operating systems: they were calculated using punch and punch cards. Can only be processed one by one.Later, batch processing system was produced, which can be processed in

Let Python automatically manipulate the desktop or application window, click, slide the mouse, enter text, etc.# coding=utf-8from Pymouse Import pymousefrom pykeyboard import pykeyboardimport time, Randomimport Pyautogui as PAGM = Py Mouse () K =

ubuntu 16.04本身是自带python的，他本身是自带2.X和3.X,两个版本，默认的是2.X。这里记录一下如果在版本间切换以及如何把python版本切换到3.X下的方法。1. See the version of Python installed in Ubuntu and the Python version currently in useLs/usr/bin/python*python--version2. Set Update-alternatives to toggle

I use the Python matplotlib module for a simple drawing operation, as a primer reference, directly below the code:#coding: Utf-8import numpy as npimport matplotlib.pyplot as pltx=np.linspace (- Np.pi,np.pi,512,endpoint=true) C=np.cos (x) s=np.sin (x)

1. Using the built-in function List.sort ()1 class Solution: 2 """ 3 @param: A: An integer array4 5 "" "6 def sortintegers (self, A):7 A.sort ()2. Using the sorted () function1 Sorted ([5, 2, 3, 1, 4])2 [1, 2, 3, 4,

#Coding=utf-8"""download Baidu Pictures According to the search terms"""ImportReImportSYSImportUrllibImportRequestsdefGet_onepage_urls (onepageurl):"""gets the URL of the next page that urls+ the current page of all pictures for a single page flip"""

Adorner:1>>>defA (func):2...defB (*argv):3...Print("In b")4...returnFunc (*argv)5...returnb6 ... 7>>>defC (A, b):8...Print(a**2,b**2)9 ... Ten>>> C =A (c) One>>> C (2,3) A inchb -6 { ->>> c.__name__ the 'b' ->>> @a#adorner syntax sugar = c = A (c) -.

The path to Python in Xiao Bai _ day1 and the path to python _ day1 Comparing Python with java, the code is more concise. Python 3.X Hello World Program: 　　　　print("Hello World!") Java Hello World Program: 　　　　public class HelloWorld{