python rookie, while watching the python subprocess tutorial of Liao Xuefeng, I encountered the following error report when executing nslookup command operating system: win10 python version: 3.7 import subprocess print( $ nslookup ) p = subproc...
I want to add several pieces of data to an excel through Pandas. Check the document and find Pandas.ExcelWriter ( http: pandas.pydata.org pand...) has this function, but if you need to append data to excel When using, set the parameter mode to ...
l = [ 1 , 2 , 1 , 1 ] for i in l: if i == 1 : i = 3 print(l) Why is the result of l still [ 1percent, 2percent, 1percent, 1 ], and how can it be modified to [ 3percent, 2percent, 3percent, 3 ]? ...
I bought a server, and I encountered some problems when deploying flask program for the first time, as follows Google found that you can directly use gunicorn3 to support python3 . After the server is installed, it can be started using gunicorn3...
I encountered a problem when I used flask_sqlalchemy for the first time, as follows uses python version 3.6 , uses conda as the package manager, and has successfully installed flask_sqlalchemy and other related dependent packages. the simpl...
there are too few documents on the Internet, so let s ask the first question, Websocket Client of Python, how to subscribe to a specified channel? I can t find it all over Google. I see a lot of articles are written: ws.send (json.dumps ({ "event ...
squares = [] for x in range(1, 5): squares.append(x) print(squares) the result is [1] [1, 2] [1, 2, 3] [1, 2, 3, 4] my understanding is as follows, is this correct? Or should I force an explanation? x = 1, append (x) adds 1 to the list. A...
appium+ simulator found the id of the element with uiautomatorviewer but: find_element_by_id( com.ss.android.me:id i7 ) makes a mistake selenium.common.exceptions.NoSuchElementException: Message: An element could not be located on the page using ...
I saw a video where a script controls Mario s automatic customs clearance. How does it control the movement of game characters? Or, how do I tell the progress of the game that I "pressed " a key? I am very interested in this, but I have no contact with...
when I first came into contact with the database, I was not proficient in many operations. I encountered some doubts as follows: the version of python used is 3.6 Code first: import sqlite3 from pathlib import Path def open_db(): root = Pa...
when I first came into contact with the database, I encountered some problems during my practice. After consulting the materials, I still couldn t find the answer. Several questions are as follows: question 1: how to place the connection for sqlite3...
Hello everyone, I have a requirement now. Now, for example, I have a class. There are no specified functions in the class. The effect I need to do is object.fun ( kwargs) or objcet.func_path.func ( kwargs) . object is my instantiated object, and then ...
recently I learned about the tornado framework, so I heard a saying that not all python libraries support asynchronism. OK, so think of it. It may be said that if a child thread or a child process is running this code at the same time, either there will ...
u = https: xxx.com {id} id = 1 b = f"{u}" -sharp https: xxx.com {id} c = https: xxx.com 1 how does the f-string of python make b achieve the result of c? can t define id first, nor do I want the method of f {xxx.com} {id}...
topic description there is a code that looks like this: job = scheduler.add_job(myfunc, interval , minutes=2) job.remove() Same, using an explicit job ID: scheduler.add_job(myfunc, interval , minutes=2, id= my_job_id ) scheduler.re...
the code in the following file structure _ _ init__.py: c = 12 Code in ff.py: from . import c print(c) run ff.py to report an error directly: Traceback (most recent call last): File "ff.py", line 1, in <module> from . impor...
data are as follows { "message":"abc","result":{ "paramtypeitems":[ {"name":"","paramitems":[ {"id":567,"name"...
Hello, everyone. I have reported the problem of useless-super-delegation with pylint detection. How to solve this problem? my way of writing: class BaseHandler (RequestHandler): executor = ThreadPoolExecutor(1024) def __init__(self, *args, **kwa...
returns a list after running a function. The second function uses the list of the first function, but when the list is output, it becomes not a list and cannot be len (). figure: The bin variable is the result of the previous function, and during t...
php $output = shell_exec( python D: test.py ); Python test.py from os import startfile -sharp path = D: Wildlife.wmv startfile(path) the video is not played when the php file is called, but I can execute python test.py with th...
I want to debug the local php code. My configuration is in accordance with the configuration in this article. https: www.cnblogs.com study. has been configured according to the steps in the article. I also hit the breakpoint, but I still can t debug ...
beginners ask current environment pip 18.0 from usr local lib python3.7 site-packages pip (python3.7) spyider file is version 803 in github, and pycurl with replaced keywords has also been reinstalled online method and tried again and finally pla...
problem description A judgment about the data removes the value from the array if it is empty, and passes the MD5 encrypted character value to the value if it is not empty. for example, an array of $data has $data [ pass ]. If $data [ pass ] is...
1. How to translate the input of rich text with one click? Rich text inputs are all marked with html tags. How to translate the contents of the tags well without affecting the original tags for example: <img src="xxx"> <span>&l...
if it is not the official setting, could you tell me how to make the three dots flashing back and forth ...