Recent questions tagged Python

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python - Finding the largest delta between two integers in a list

I have a list of integers, i.e.: values = [55, 55, 56, 57, 57, 57, 57, 62, 63, 64, 79, 80] I am ... a faster way to do this? It takes a while. 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 - ImportError: cannot import name RAND_egd

I've tried to create an exe file using py2exe. I've recently updated Python from 2.7.7 to 2.7.10 to be able ... ': {'packages': ['requests']}}) 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 - pandas.read_excel parameter "sheet_name" not working

According to pandas doc for 0.21+, pandas.read_excel has a parameter sheet_name that allows specifying which sheet is ... be the problem 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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python 3.x - np.add.at indexing with array

I'm working on cs231n and I'm having a difficult time understanding how this indexing works. Given that x = [[0,4,1], [3, ... , [0, 1, 2, 2], 1) 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 - Splitting a list into uneven groups?

I know how to split a list into even groups, but I'm having trouble splitting it into uneven groups. ... (and also splits incorrectly). 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 - Return image url in Django Rest Framework

I am using Django Rest Framework and have the following model: class Picture(models.Model): some_field = models.ForeignKey ... :'url to image'}? 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 - Pandas style object with multi-index

I am formatting a pandas dataframe with styler to highlight columns and format numbers. I also want to apply multi ... /issues/11655 thank you ! 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 use .predict_generator() on new Images - Keras

I've used ImageDataGenerator and flow_from_directory for training and validation. These are my directories: train_dir = ... get a solution. 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 list of big O complexities for the numpy library?

I'm doing a time complexity analysis of an algorithm and need to know what kind of complexities certain ... match the mathematical operation? 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 - Extended slice that goes to beginning of sequence with negative stride

Bear with me while I explain my question. Skip down to the bold heading if you already understand extended slice list indexing. ... 3, 2, 1, 0] See Question&Answers more detail:os...

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

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306 views

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python - Custom padding for convolutions in TensorFlow

In tensorflow function tf.nn.conv2d, the padding option just has 'SAME' and 'VALID'. But in the conv layer ... Tensorflow? Thank you very much. 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 - Does NLTK have a tool for dependency parsing?

I'm building a NLP application and have been using the Stanford Parser for most of my parsing work, ... to parse grammatical dependencies? 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 - Efficient way to find overlapping of N rectangles

I am trying to find an efficient solution for finding overlapping of n rectangles where rectangles are stored in two ... deal with the problem? See Question&Answers more detail:os...

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

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536 views

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python - How to install Selenium in a conda environment?

I'm trying to install Selenium in a conda environment in Windows 10 with conda install --name myenv ... complete this package installation? See Question&Answers more detail:os...

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

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310 views

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python - Create a new list from a list when a certain condition is met

I want to make a new list from another list of words; when a certain condition of the word is met. In this case ... word) == 9: newlist.append() See Question&Answers more detail:os...

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

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458 views

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python - matplotlib animation movie: quality of movie decreasing with time

I am trying to create a movie with the animation.FuncAnimation function in matplotlib. The movie looks fine ... am I missing something? See Question&Answers more detail:os...

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

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417 views

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python - Generating random correlated x and y points using Numpy

I'd like to generate correlated arrays of x and y coordinates, in order to test various matplotlib plotting ... samples from the 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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453 views

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python - How can I preserve <br> as newlines with lxml.html text_content() or equivalent?

I want to preserve <br> tags as when extracting the text content from lxml elements. Example code: fragment = ' ... child, with two text nodes' See Question&Answers more detail:os...

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

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820 views

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python - How to mock aiohttp.client.ClientSession.get async context manager

I have some troubles with mocking aiohttp.client.ClientSession.get context manager. I found some articles and here ... async context manager ? See Question&Answers more detail:os...

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

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762 views

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python - Flask/Werkzeug how to attach HTTP content-length header to file download

I am using Flask (based on Werkzeug) which uses Python. The user can download a file, I'm using the ... header in Flask. 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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568 views

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python - How to differentiate between HDF5 datasets and groups with h5py?

I use the Python package h5py (version 2.5.0) to access my hdf5 files. I want to traverse the content of a ... , of all groups, of all links? See Question&Answers more detail:os...

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

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324 views

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python - Django Pandas to http response (download file)

Python: 2.7.11 Django: 1.9 Pandas: 0.17.1 How should I go about creating a potentially large xlsx file ... for this and not a 'HttpResponse'. See Question&Answers more detail:os...

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

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415 views

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python - Permanent 'Temporary failure in name resolution' after running for a number of hours

After running for a number of hours on Linux, my Python 2.6 program that uses urllib2, httplib and threads, ... I diagnose and fix the problem? 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 - Importing and changing variables from another file

Okay... I have searched and searched looking for an answer that directly answers my question, but have had no ... 11, thank you in advanced. See Question&Answers more detail:os...

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

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247 views

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python - Is there any example of cv2.KalmanFilter implementation?

I'm trying to build a veeery simple tracker for 2D objects using python wrapper for OpenCV (cv2). I've only ... the cv2... Thanks in advance! See Question&Answers more detail:os...

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

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490 views

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python - AttributeError: 'module' object has no attribute 'ORB'

when I run my python code import numpy as np import cv2 import matplotlib.pyplot as plt img1 = cv2.imread('/ ... I am using python3 and opencv3 See Question&Answers more detail:os...

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

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390 views

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python - Grouping by multiple columns to find duplicate rows pandas

I have a df id val1 val2 1 1.1 2.2 1 1.1 2.2 2 2.1 5.5 3 8.8 6.2 4 1.1 2.2 5 8.8 6.2 I want to group by ... .2 4 1.1 2.2 3 8.8 6.2 5 8.8 6.2 See Question&Answers more detail:os...

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

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452 views

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python 3.x - Why coroutines cannot be used with run_in_executor?

I want to run a service that requests urls using coroutines and multithread. However I cannot pass coroutines to the ... =LEN) is good enough? See Question&Answers more detail:os...

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

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