I messed up the list with random.shuffle, but it was still in the same order import random a = [20,16,10,5] random.shuffle (a) print ( "randomly sorted list: ", a) I can just try it on my classmate s computer. Is it python3.5 that I am missi...
how to deal with decoding errors when reading files? ...
1. When crawling a web page with python3, the web side shows that the code is utf-8, itself. When crawling, the code is also set to utf-8, but a print result is garbled in Chinese. 2.:url = http: wxqqyy.info thread-922... headers = { }response = ...
there are n ordered sets, and each element of the set is a range. Find the intersection of n sets, for example, the union of sets {[2jue 4], [9jue 13]} and {[6jue 12]} is {[2jue 4], [6jue 13]}. How to implement with python?...
Crawler Code: import requests import re content = requests.get( https: book.douban.com ).text pattern = re.compile( <li.*?cover.*?href="(.*?)".*?title="(.*?)".*?more-meta.*?author">(.*?)< span>.*?year">...
for example, a string: American (United States of) to extract: (United States of) or Abcde (Df WD asdAS ASDW) to extract: (Df WD asdAS ASDW) to use regular expressions Thank you guys ...
pairs of positive integers (xpeny), the remainder of xrecery y is greater than or equal to k, the input is nmemery k, and the output is how many, for example, input 52, output 7, logarithms are (2magin3) (2magin4) (2mem5) (3pyrr5) (4preline 5) (5pc5), t...
wrote a tool with an interface in PyQt5+Python3.6 and wanted to package it into a .exe file so that it could run on a machine without a python environment. Use pyinstaller to package as said on the Internet. After packing, an error is reported after open...
original page html code: <html xmlns="http: www.w3.org 1999 xhtml"> <head> <meta charset="utf-8" > <meta content="pdf2htmlEX" name="generator" > <meta content="IE=edge...
beginner Python, for advice: def print_dict(**person): print(person) print_dict( a = jack , b = rose ) -sharp { a : jack , b : rose } The parameter is preceded by two asterisks so that Python creates a dictionary to hold the ar...
recently, I have been using Python to process bus GPS track data, but I have encountered some coding problems, which are very annoying. The original data is in .gz format. After I decoded it on windows, I converted it into a file in .txt format, but the...
The problem is this: the client needs to send messages in five different message queues, and the server calls different functions after receiving messages in five queues. I declare on the server that five queues are declared at the same time, but when...
in order to obtain Tencent Cloud s ssl certificate, enter the URL domain name after modifying the non-Wanwang domain name registered by Aliyun. the website cannot be accessed. Has anyone encountered ? nginx is normal: [root@iZwz9hbv3lrr68d8bo5dvp...
I use CSV s dictreader () to read the CSV file. I want to put the value of the duration column in the file into the list duration_list, but the error after running is as follows: the following is the code section: def count_duration (filename,ci...
call the module implemented by C in python to pass parameters between python and C as needed, but the number of parameters is uncertain and can be changed. May I ask how to achieve it? all the interfaces you see now have to determine the number of par...
the newly installed win7 system, Ann python is, the installation package setup comes out of this, which I have encountered before. I forgot how to solve it. ...
Open a chrome browser using selenium, and open a Baidu web page. Using the send_keys () method to fill in the content in the search box, there are the following problems -sharpcoding:utf-8 from selenium import webdriver from selenium.webdriver.chrom...
I need to install both python 2.6 and python 3.6 on my machine. Based on my query, I found that I could use pyenv to do this things, but according to an article I read, python 2 series didn t come with package management tools until python 2.7.9. The...
currently I have a piece of code that spends most of its time on the above two sentences of data filtering in dataframe. temp_df = df [df [ "data_date "] .isin (date_list)] temp = temp_df [rule [2]] [temp_df [ "data_date "] = = d] at present, it tak...
I ve been looking for it for a long time, but I can t find it. 1. After the direct upload of web is completed, the server cannot know whether the file was uploaded successfully, who uploaded it, and the information of the file 2. Using web to dire...
Environment: webpack4 react and others are the latest dependencies! import React from react ; import { BrowserRouter, Route, Link, Switch, HashRouter } from react-router-dom import Loadable from react-loadable ; import Loading from...
suppose there is item number P1PowerP2and its price 10d20, the first column of the excel table generated by is a drop-down list, the median value of which is P1 or P2, select P1, the first row and the second column automatically populate the price 10 ...
problem description solve, the width in the textarea tag exceeds two lines of hidden display ellipsis, how can the width of option text in the select tag exceed the hidden display ellipsis? And how to set the ellipsis when the text in these form tags ...
how to change from vertical to horizontal by default...
Source code https: stackblitz.com edit r. class App extends Component { constructor() { super(); this.state = { name: React , checked:false, }; this.handleChange=this.handleChange.bind(this) } handleChange(event){...