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...