Recent questions tagged Python

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python 3.x - From conda create requirements.txt for pip3

Hi I usually use conda to manage my environments, but now I am on a project that needs a little more horsepower than my ... =0.19.1 six==1.10.0 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Standard deviation of a list

I want to find mean and standard deviation of 1st, 2nd,... digits of several (Z) lists. For example, I have ... of the 3rd digit...; etc). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How do I know if I can disable SQLALCHEMY_TRACK_MODIFICATIONS?

Every time I run my app that uses Flask-SQLAlchemy I get the following warning that the SQLALCHEMY_TRACK_MODIFICATIONS ... memory on my server? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Working with Anaconda in Visual Studio Code

I am getting a bit confused here, the latest Anaconda Distribution, 2018.12 at time of writing comes with an ... am running on Windows 10. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - SyntaxError: non-default argument follows default argument

from os import system def a(len1,hgt=len1,til,col=0): system('mode con cols='+len1,'lines='+hgt) system('title' ... in red. I have no clue why. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Serving a front end created with create-react-app with Flask

I have a Flask back-end with API routes which are accessed by a React single page application created using create ... to use create-react-app? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - "Could not run curl-config: [Errno 2] No such file or directory" when installing pycurl

I'm trying to install pycurl via: sudo pip install pycurl It downloaded fine, but when when it runs setup.py I ... and how to get around it See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - What is the difference between Jupyter Notebook and JupyterLab?

I am new to Jupyter Notebook, what is the key difference between the Jupyter Notebook and JupyterLab, suggest me ... should be used in future. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How does NumPy Sum (with axis) work?

I've taken it upon myself to learn how NumPy works for my own curiosity. It seems that the simplest function is the ... with a shape of (4, 2) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Optimal way to compute pairwise mutual information using numpy

For an m x n matrix, what's the optimal (fastest) way to compute the mutual information for all ... specific calculation (mutual information)? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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513 views

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python - When to use pip requirements file versus install_requires in setup.py?

I'm using pip with virtualenv to package and install some Python libraries. I'd imagine what I'm ... using them both together harmoniously. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Should I use a class or dictionary?

I have a class that contains only fields and no methods, like this: class Request(object): def __init__(self, ... than a class with slots? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to create a numpy array of all True or all False?

In Python, how do I create a numpy array of arbitrary shape filled with all True or all False? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How can I detect and track people using OpenCV?

I have a camera that will be stationary, pointed at an indoors area. People will walk past the camera, within ... this - preferably in Python? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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380 views

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python - How to predict input image using trained model in Keras?

I'm only beginning with keras and machine learning in general. I trained a model to classify images from 2 classes ... [0]]? Thanks in advance. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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105 views

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python - What does abstraction mean in programming?

I'm learning python and I'm not sure of understanding the following statement : "The function (including its name) ... , 3 edition. Thank you ! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Installing SciPy and NumPy using pip

I'm trying to create required libraries in a package I'm distributing. It requires both the SciPy and NumPy libraries. ... do I get it to work? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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225 views

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python - Display rows with one or more NaN values in pandas dataframe

I have a dataframe in which some rows contain missing values. In [31]: df.head() Out[31]: alpha1 alpha2 ... and print them on the screen? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How do I check which version of NumPy I'm using?

How can I check which version of NumPy I'm using? (FYI this question has been edited because both the ... answer are not platform specific.) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Is it possible to go into ipython from code?

For my debugging needs, pdb is pretty good. However, it would be much cooler (and helpful) if I could go into ipython. Is this thing possible? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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157 views

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python - Convert List to Pandas Dataframe Column

I need to Convert my list into a one column pandas dataframe Current List (len=3): ['Thanks You', 'Its ... index in Required Pandas DF above. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - django test app error - Got an error creating the test database: permission denied to create database

When I try to test any app with command (I noticed it when I tried to deploy myproject using fabric, which uses ... Not used with sqlite3. } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - django order_by query set, ascending and descending

How can I order by descending my query set in django by date? Reserved.objects.all().filter(client=client_id) ... the Reserved by check_in date. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Collectstatic error while deploying Django app to Heroku

I'm trying to deploy a Django app to Heroku, it starts to build, download and installs everything, but that's ... media -- .git Any thoughts? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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266 views

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python - Django Rest Framework Token Authentication

I have read the Django Rest Framework Guides and done all the tutorials. Everything seemed to make sense and work ... better for a first-timer? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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149 views

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python - Using Pylint with Django

I would very much like to integrate pylint into the build process for my python projects, but I have run ... source it was loading/invoking.) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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356 views

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python - Using Keras & Tensorflow with AMD GPU

I'm starting to learn Keras, which I believe is a layer on top of Tensorflow and Theano. However, I only have ... OpenCL? I'm running on OSX. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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124 views

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python - Enable access control on simple HTTP server

I have the following shell script for a very simple HTTP server: #!/bin/sh echo "Serving at http://localhost: ... -Origin: * to this server? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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