face recognition using eigenfaces python code

Using the Python decorator to remove redundant code in the Django framework, pythondjango The Python decorator is a powerful tool for eliminating redundancy. As you modularize a function into an appropriate size method, the decorator Can make it a concise function even for the most complex workflow. For example, let's

This article mainly introduces Python using the Zipper method to implement the dictionary, the text gives a detailed example code, I believe that we have a certain reference value, the need for friends can take a look below. Objective The dictionary is also called the hash list, the biggest feature is to find its corresponding value by key of its time complexity

Create a configure file using python code, In lua, you have always used lua as a config file or a file that carries data. The advantage is that lua itself is well-read, and no extra parsing code is required, you can also read environment variables and condition judgments in configure files. Use loadfile and setfenv i

This article mainly introduces the simple analysis and code example of using the Insertion sorting algorithm in Python. The average time complexity of the insertion algorithm is O (n ^ 2). For more information, see Problem Description Sorts random numbers in ascending order. Insert algorithm Take a number from the array each time, compare it with the exis

This article mainly introduces Python's method of capturing webpage images using regular expressions, and analyzes the reading and regular expression matching related operations of Python webpage files based on specific examples, for more information about how to capture web images using regular expressions in Python,

Event object to true. The Event object provides the isSet () method to determine the status of its internal signal signs. when the set () method of the event object is used, the isSet () method returns true. 2. clear the signal The clear () method of the Event object can be used to clear the signal signs inside the Event object and set it to false. when the clear method of the Event is used, the isSet () method returns false 3. waiting The Event object wait method can be executed quickly and re

The Python adorner is a powerful tool for eliminating redundancy. With the ability to block functionality into the right size, even the most complex workflow, adorners can make it a neat feature. For example, let's look at the Django Web framework, which processes the requested method to receive a method object and returns a response object: def handle_request (Request): return HttpResponse ("Hello, World") I recently encountered a case where I ne

question No. 0013: use Python to write a crawl picture of the program, crawl this link in the Japanese sister pictures:-) Reference Code Full codeIdeas:In fact, this can not be scrapy, using regular matching +request should be able to complete the task. I want to practice the scrapy, so I use Scrapy to do this.This only requires crawling a page of p

This article describes how to use the kNN algorithm using Python code examples. Here is an example to predict the gender of Douban movie users. If you need a friend, refer to the adjacent algorithm, or K-Nearest Neighbor (kNN, k-NearestNeighbor) classification algorithm is one of the simplest methods in Data Mining classification technology. The so-called K-Neare

the number of times the function was called;Tottime: Indicates the total elapsed time of the specified function, and removes the run time of the calling child function in the function;Percall: (the first percall) equals tottime/ncalls;Cumtime: Represents the time that the call to the function and all its child functions runs, that is, when the function starts calling to the return time;Percall: (the second percall) is the average time that a function is run, equal to Cumtime/ncalls;Filename:lin

This article mainly introduces the implementation code for logging on to the asp website page using python. For more information about how to log on to the asp website using python, see, the reason is that the asp page requires viewstate to be included in each request. There

QRCode official websitehttps://pypi.python.org/pypi/qrcode/5.1Brief introductionPython-qrcode is a third-party module used to generate two-dimensional code images, depending on the PIL module and the QRCode library.Simple usageImport= Qrcode.make ('Hello, qrcode') img.save (' Test.png')Advanced usageImport= qrcode. QRCode ( version=1, error_correction=Qrcode.constants.ERROR_CORRECT_L, box_size =10, border=4,) qr.add_da

#Pycharm Remote Connection | programming |# Choose project Path carefully!! Don't pick the wrong! It's best to do a backup when you pull down the server project source code! Or choose the Xshell or terminal connection way! 1. Connect two items of Tools--Development and Configuration--Connection Select and fill in the sftp host:[email protected]***.***.**.***and User Name,password-Mappings Local Path: Select development path on server'Name': Select a p

This article mainly for you in detail the use of Python to draw a report to set the cell color of the instance code, with a certain reference value, interested in small partners can refer to Original address: Python sets cell shading and background color by pattern Author: Tengpython When you set the cell shading and background color of an Excel file by

':'id_5','title':'title_5'}]If you want to directly return a simplified structure similar to the following:class Simpleinfo (object): def __init__ (self): "' "'=None Also only need to pre-define a and alist long storage simpleinfo structure, such as long blist, the use of the combined zip function, a little change can be:>>> blist = [Simpleinfo () forIinchRange (0, Len (alist))]>>> Needed_keys = ['ID','title','URL','P1']>>> [[SetAttr (Y, K, getattr (x, K)) for

://bj.xiaozh u.com/search-duanzufang-p{}-0/'. Format (str) in a range (1, 4)] def insert_house_info (url_s): for URL _a in url_s: # get page Data Wb_data = Requests.get (url_a) # with lxml parsing engine, parse data soup = BeautifulSoup (Wb_data.text, ' lxml ') prices = Soup.select (' span.result_price ') titles = Soup.select (' #page_list > UL > li > Div.result_btm_con.lodgeunitname > div > A > span ') urls = soup.select (' #page_list > UL Gt li > Div.result_btm_con.lodgeunitname ') for price

Demonstrate the list generative usage in Python using code instances. 1 sq list If you want to create a list containing 1 to 10 square meters, you can do this: squares = []for x in range(10): squares.append(x**2) This is a simple example, but you can use the list generator to create this list more concisely. squares = [x**2 for x in range(10)] The simplest list

Python converts a webpage into a PDF code instance using pythonpyqt The code is very simple, and the function is very simple = w = Webpage2pdf #! /Usr/bin/env python3 import sys try: from PyQt4 import QtWebKit from PyQt4.QtCore import QUrl from PyQt4.QtGui import QApplication, qprinterlace t ImportError: from PySide

Simulate logon using the Request library in Python (1): The font library (no encryption, no verification code), pythonrequest Such simple (Insecure) login forms are rare. The following figure shows the log-on Form of the font library, saving irrelevant content: 1 Through packet capture analysis, we can find that the user name and password are not encrypted: Dir

?act=getkeyr=0.4365052982637341'3headers={Copy the headers} to which the packet was caught4 session.headers.clear ()5 session.headers.update (Headers)6R=session.get (URL)7Jsondata=json.loads (R.text)8 #hash change, key unchanged9 return(jsondata['Hash'],jsondata['Key'])3. Encryption, refer to the appendix of the demo login of the blog Park1 defEncrypt (Hash,key,password):2 fromCrypto.publickeyImportRSA3 fromCrypto.cipherImportpkcs1_v1_54 fromBase64ImportB64encode5Encryptor