Recent questions tagged Python

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python - Unicode characters not rendering with PIL ImageFont

I'm trying to write tiff images using box drawing characters, but all of the characters in question show up as: The box ... 2.7.2 on Windows 7. 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 - Flask session member not persisting across requests

I'm writing a quick app to view a giant XML file with some AJAX style calls to viewgroup. My problem is ... groups to stay around. Any hints? 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 - Multiple aggregation in group by in Pandas Dataframe

SQL : Select Max(A) , Min (B) , C from Table group by C I want to do the same operation in ... more than one operation while grouping by. 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 - Prediction: Time-series prediction of future events using SVR module

I want to perform time-series prediction of future events using SVR module from scikit-learn. Here is my source ... ,261,260,2267648,5823,29312 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 install jupyterlab-execute-time extension

Whenever I try to install jupyterlab-execute-time extension, I get the following error . Is there any ... 3.0.0 @jupyterlab/settingregistry 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: Calling function when button is pressed

import tkinter as tk def load(event): file = open(textField.GetValue()) txt.SetValue(file.read()) file.close ... t understand how to resolve it. 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 - AttributeError: 'tuple' object has no attribute 'lower'

I wanted to specify the format of the date because it's in European format(Or else the dates will not be in ... What's wrong with it? Thanks. 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 window closes immediatly after opening up

import pygame #initialize the screen pygame.init() #create the screen screen = pygame.display.set_mode((80, 600)) ... of visual studio 2019. 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 - No response with POST request and Content-Type "application/json" in flask

I'm having problems with a Flask view that should return a response with content-type "application/json" in ... expected response.. Any ideas? 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 does my recursive function with if-elif statements return None?

I'm currently trying to wrap my head around learning Python and I've come to a bit of a stall on ... proper way to recurse this function? 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 does assigning to self not work, and how to work around the issue?

I have a class (list of dicts) and I want it to sort itself: class Table(list): def sort (self, ... itself (not only an instance variable)? 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 - Ignore str.format(**foo) if key doesn't exist in foo

I am trying to get an email template together. The message content will be dependent on values within a ... in the look-up dictionary? 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 - Keyword only parameter

Reference http://docs.python.org/3/glossary.html#term-parameter keyword-only parameter: specifies an argument that can ... something wrong ... See Question&Answers more detail:os...

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

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357 views

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python - Error Converting PIL B&W images to Numpy Arrays

I am getting weird errors when I try to convert a black and white PIL image to a numpy array. An example ... numpy to make it convert properly? See Question&Answers more detail:os...

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

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277 views

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python - Incorrect rectangle location in matplotlib

I'm making a plot with bars and I'm trying to find their absolute location (in pixels) on the plot for ... wide. What is the discrepancy here? See Question&Answers more detail:os...

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

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492 views

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python - Convert RGB image to index image

I want to convert a 3 channel RGB image to a index image with Python. It's used for handling the labels ... (im, cv2.COLOR_BGR2GRAY), lut) 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 - SQLAlchemy column name with space

I'm trying to filter a table on a column that contain spaces. ... events = database_session.query(table) events. ... t seem to find it anywhere. 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 3.x - sqlite3 error: You did not supply a value for binding 1

def save(): global editor conn = sqlite3.connect('address_book.db') c = conn.cursor() recordID = delete_box.get() ... could be the root of 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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753 views

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python - Drawing rectangle using mouse events in Tkinter

This is with respect to Draw rectangle on mouse click [Python]. I tried out the first solution and it works ... of help will be 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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631 views

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python - Find the index of the second occurrence of a string inside a list

This is my list and code: x=[["hi hello"], ["this is other"],["this"],["something"],["this"],[ ... second occurrence of a string inside a 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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270 views

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python - Pandas: drop row if more than one of multiple columns is zero

I have a dataframe as such: col0 col1 col2 col3 ID1 0 2 0 2 ID2 1 1 2 10 ID3 0 1 3 4 I want to ... like I'm close with the 2nd attempt here. See Question&Answers more detail:os...

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

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279 views

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python 2.7 - Tensorflow + Keras + Convolution2d: ValueError: Filter must not be larger than the input: Filter: (5, 5) Input: (3, 350)

I have been trying to run the code below which I got from here and even though I have changed almost nothing other than ... , 5) Input: (3, 350) See Question&Answers more detail:os...

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

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311 views

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python - Only plot part of a 3d figure using matplotlib

I got a problem when I was plotting a 3d figure using matplotlib of python. Using the following python function, I ... to do it using python? See Question&Answers more detail:os...

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

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214 views

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python - Compact notation for multidimensional slicing

Let's say I have 3 (or more) dimensional array A and two arrays with minimum and maximum edges left, right for slicing ... , [130, 131, 132]]]) See Question&Answers more detail:os...

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

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420 views

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python - Can I convert spectrograms generated with librosa back to audio?

I converted some audio files to spectrograms and saved them to files using the following code: import os from ... listen to the results later. See Question&Answers more detail:os...

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

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697 views

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python - xfeatures2d not found in OpenCV on Ubuntu

I am using OpenCV version 3.2.0 and xfeatures2d is not found on this. Is there any way I can install ... object has no attribute 'xfeatures2d' See Question&Answers more detail:os...

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

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350 views

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python - draw many spheres efficiently

I need to draw many spheres, small and large, in one picture. The following code works, but takes awfully long ... that I didn't find? See Question&Answers more detail:os...

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

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181 views

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python - How can I redirect to a different URL in Django?

I have two pages, one which is to display details for a specific item and another to search for items. Let's ... worked when I tried it again. See Question&Answers more detail:os...

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

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