Recent questions tagged Python

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python - Replace Column in Data Frame from Lookup of other Data Frame

Hi, I have two data frames, one containing:- Country Code | Population and another containing:- Country Code ... > POL | 50 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Pygame lags after drawing full window grid

I was coded a simple pygame grid window. but pygame window start lag after that. Here is that simple code? ... of drawGrid() function position. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - function not returning value. Error "NameError: name 'urlss' is not defined"

This is a part of my program. It gives the error NameError: name 'urlss' is not defined def testfunc(): ... print urlss Why does this occur? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - My implementation of Bridson's algorithm Poisson-Disk Sampling seems to be stuck in an infinite loop

A video by Sebastion Lague explained the Bridson's algorithm really well. To oversimplify, Create cell grid ... return neighbours Please help. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Tkinter: Updating progressbar when a function is called

Imagine the following simple example: def doNothing(): sleep(0.5) barVar.set(10) sleep(0.5) barVar.set(20) ... over ssh and grabing some info. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Figure GUI freezing

I am fairly new in python, and I am trying to have a plot, based on data stored in a file. This file ... other topic on a file based drawing. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - QWebEngineView update with pdf path

I have a QtWebEngineWidgets showing some pdf files. I want to change pdf and force QtWebEngineView display automatically ... .exec_()) Display: See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Loop over empty iterator does not raise exception

I am on Python 3.6.7. I just noticed that a for loop over an empty list does not loop even once. After some ... assert "element" in dir() #? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Why is my pygame window not opening after I close another window and producing an unexpected error?

so here is my code: import math import random import time import pygame from pygame import mixer import ... far as I understand. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Why am I getting AmbiguousForeignKeysError?

I've run into an issue after following the SqlAlchemy guide here. Given the following simplified module: class _Base(): id_ = ... --+---------+ See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to move SimpleSocket server into a background process

I have a simple socketServer that works perfectly on the main thread. #Server PORT PORT = 8020 #reassign variables ... start it and walk away. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Unable to scrape google news heading via their class

I am trying to scrape google news headings along with their links for input term. But when I searched via ... it returning an empty list. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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231 views

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python - process socket data that ends with a line break

What is the best approach to process a socket connection where I need var data to end with a line break ? I ... of chunked data: line1 line2 lin See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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158 views

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python - Can't open websocket on mobile devices

I am attempting to set up a websocket with server running on my raspberry pi. The following code is slightly modified ... a> </body> </html> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Is there a way to restrict the title crawl to certain portion of screen?

I am trying do end credits like animation the code above for Title crawl, I am trying to make the following changes ... == '__main__': main() See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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207 views

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python - Change class of child on django models

Lets say I have classes in the form: class A(models.Model): attrA = models.CharField() class B(A): ... attribute available. Is that possible? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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746 views

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python - Tkinter bringing chosen option from optionMenu into a variable for further use

when creating a drop-down menu in "tkinter" like this: options = ['0', '1', '2', '3', '4'] option = ... into a variable that I can use later on. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - App Engine: Few big scripts or many small ones?

I am working on a website that I want to host on App Engine. My App Engine scripts are written in Python. ... a whole array of different tasks? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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739 views

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python - The specified device is not open or is not recognized by MCI

I was programming a game using Python and a sound effect needed to be played, so I used the playsound module: ... there any way to solve this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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167 views

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python - How to have each sprite in a group A chasing the closest sprite in group B?

Just starting to learn python here. I want to make two groups, where each sprite in one group chases whichever ... Thank you for the help! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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455 views

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python - Matplotlib 2D histogram seems transposed

I have the following code to plot a 2d histogram in pyplot: #!/usr/bin/env python import numpy as np ... Any help would be greatly appreciated! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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383 views

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python - Which PyTorch modules are affected by model.eval() and model.train()?

The model.eval() method modifies certain modules (layers) which are required to behave differently during training ... modules are affected? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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169 views

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python - Draw an M-shaped pattern with nested loops

I just started Python 2.7 very recently, but I'm stuck at this a problem: Make a program that prints an "M" ... I've can only make the first. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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187 views

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python - What does the comma in this assignment statement do?

I was looking through an interesting example script I found (at this site, last example line 124), and ... insight would be greatly appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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156 views

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python - why this regex cannot find the result

I have a python code like below: My question is why the matched variable is [' ']? (I used the regex in regexpal.com, ... names*=(.)*?|",a,re.I) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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270 views

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python - Merge two datasets in Pandas

I have previously worked with Stata and am now trying to get the same done with Python. However, I have ... Am I missing something crucial? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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180 views

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python - What is the difference between sum() and count() in pandas?

Can you help me understand the difference between the statements mentioned below? Given that Survived column contains ... '].Survived.sum() See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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326 views

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python - Convert multi-dimensional Numpy array to 2-dimensional array based on color values

I have an image which is read as a uint8 array with the shape (512,512,3). Now I would like to ... , but this is obviously time-consuming. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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