Recent questions tagged Python

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python - How do I use AND in a Django filter?

How do I create an "AND" filter to retrieve objects in Django? e.g I would like to retrieve a row ... accomplish this in Django using filters? 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 - Understanding __init_subclass__

I finally upgraded my python version and I was discovering the new features added. Among other things, I was ... to fully comprehend its usage? See Question&Answers more detail:os...

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

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587 views

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python - Django test runner not finding tests

I am new to both Python and Django and I'm learning by creating a diet management site but I've been ... am running manage.py test pyDietTracker 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 - Extract points/coordinates from a polygon in Shapely

How do you get/extract the points that define a shapely polygon? Thanks! Example of a shapely polygon from shapely. ... polygon = Polygon(x,y) 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 determine if a number is any type of int (core or numpy, signed or not)?

I need to test whether a variable is of type int, or any of np.int*, np.uint*, preferably using a ... test should return False for float-likes. See Question&Answers more detail:os...

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

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194 views

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python - Simple way to create matrix of random numbers

I am trying to create a matrix of random numbers, but my solution is too long and looks ugly random_matrix = [[ ... does not fit on one line. 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 remove all of the data in a table using Django

I have two questions: How do I delete a table in Django? How do I remove all the data in the table ... not successful: Reporter.objects.delete() 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 - What causes [*a] to overallocate?

Apparently list(a) doesn't overallocate, [x for x in a] overallocates at some points, and [*a] overallocates all ... n: Zooming out to larger n: 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 - Jinja2 shorthand conditional

Say I have this: {% if files %} Update {% else %} Continue {% endif %} In PHP, say, I can write a ... jinja2 template: 'yes' if foo else 'no' 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 - What is the easiest way to get current GMT time in Unix timestamp format?

Python provides different packages (datetime, time, calendar) as can be seen here in order to deal with time. I ... GMT time in Unix timestamp? 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 - Computing and drawing vector fields

I am trying to draw a potential field for a given object using the following formula: U=-α_goal*e^(-((x-x_goal ... -100:1000:200j] Any idea why? See Question&Answers more detail:os...

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

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345 views

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python - Running a flask app with nginx and gunicorn

I'm new at this and have only been using nginx to serve static files. I have now installed flask and gunicorn. If ... . If not, do tell. 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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212 views

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python - How does asynchronous training work in distributed Tensorflow?

I've read Distributed Tensorflow Doc, and it mentions that in asynchronous training, each replica of the ... work in distributed Tensorflow? See Question&Answers more detail:os...

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

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1.1k views

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python - Django BigInteger auto-increment field as primary key?

I'm currently building a project which involves a lot of collective intelligence. Every user visiting the web site gets ... to fill in? 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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1.4k views

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python - django-admin: Add extra row with totals

I'm using the standard django admin module to display a list of rows. One of the columns is a numerical field. I'd ... it? I'm using Django 1.2. See Question&Answers more detail:os...

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

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271 views

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python - Return results from multiple models with Django REST Framework

I have three models - articles, authors and tweets. I'm ultimately needing to use Django REST ... )) serializer_class = TimelineSerializer See Question&Answers more detail:os...

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

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608 views

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python - Creating link to an url of Flask app in jinja2 template

In my Flask app, I have a view which displays a post @post_blueprint.route('/post/<int:year>/<int:month>/<title>') ... I,m not able to find 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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445 views

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python - Verifying PEP8 in iPython notebook code

Is there an easy way to check that iPython notebook code, while it's being written, is compliant with PEP8? See Question&Answers more detail:os...

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

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1.2k views

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python - What's the time complexity of functions in heapq library

My question is from the solution in leetcode below, I can't understand why it is O(k+(n-k)log(k)). ... .heappop(heap) return heapq.heappop(heap) See Question&Answers more detail:os...

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

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385 views

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python - How to convert a DataFrame back to normal RDD in pyspark?

I need to use the (rdd.)partitionBy(npartitions, custom_partitioner) method that is not available on the ... applySchema) return self._lazy_rdd See Question&Answers more detail:os...

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

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161 views

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python properties and inheritance

I have a base class with a property which (the get method) I want to overwrite in the subclass. My first ... other preferred ways to do 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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176 views

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python - What’s the difference between a project and an app in Django world?

I am creating my first real website using Django but I am still struggling to understand the diff between a ... best practice in this situation? See Question&Answers more detail:os...

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

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192 views

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python - Generator as function argument

Can anyone explain why passing a generator as the only positional argument to a function seems to have special rules ... at 0x7effe06bdcd0>, 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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386 views

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python - How to get Tensorflow tensor dimensions (shape) as int values?

Suppose I have a Tensorflow tensor. How do I get the dimensions (shape) of the tensor as integer values? I ... ) of type 'Dimension' instead. See Question&Answers more detail:os...

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

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729 views

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python - How can I make a blank subplot in matplotlib?

I am making a group of subplot (say, 3 x 2) in matplotlib, but I have fewer than 6 datasets. How can I ... that space blank and devoid of axes? See Question&Answers more detail:os...

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

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538 views

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python - Disable auto wrap long line in Visual Studio Code

I use Visual Studio Code to write Python code with Pylint. When I press Ctrl + S (save), the editor wraps a long ... : 120, but it didn't work. See Question&Answers more detail:os...

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

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185 views

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python - Having options in argparse with a dash

I want to have some options in argparse module such as --pm-export however when I try to use it like args. ... have - in command line options? See Question&Answers more detail:os...

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

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329 views

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python - Sending messages with Telegram - APIs or CLI?

I would like to be able to send a message to a group chat in Telegram. I want to run a python script ... this might be useful for someone else. See Question&Answers more detail:os...

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

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