Recent questions tagged Python

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python - boto3 client NoRegionError: You must specify a region error only sometimes

I have a boto3 client : boto3.client('kms') But it happens on new machines, They open and close dynamically. if ... why only part of the time? 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 - Seaborn countplot with normalized y axis per group

I was wondering if it is possible to create a Seaborn count plot, but instead of actual counts on the y-axis, ... bar must depend on the group. 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 RESTful cross-domain issue with Angular: PUT, OPTIONS methods

I've developed a small write-only REST api with Flask Restful that accepts PUT request from a handful of clients that ... as well into my API? 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 or psycopg2?

I am writing a quick and dirty script which requires interaction with a database (PG). The script is a ... examples of doing this available? 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 - Adding model-wide help text to a django model's admin form

In my django app, I would like to be able to add customized help text to the admin change form for some of ... example of how I would do that? 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 - In Django is there a way to display choices as checkboxes?

In the admin interface and newforms there is the brilliant helper of being able to define choices. You can use ... find it in the documentation. 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 - Memory dump formatted like xxd from gdb

I'm trying to inspect a buffer which contains a binary formatted message, but also contains string data. As an example ... how to set that up. 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's the difference between raise, try, and assert?

I have been learning Python for a while and the raise function and assert are (what I realised is that both ... between raise, try, and assert? 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 - Read from File, or STDIN

I've written a command line utility that uses getopt for parsing arguments given on the command line. I would ... not given, read from STDIN. 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 - Difference between "axes" and "axis" in matplotlib?

I'm confused about what the different between axes and axis is in matplotlib. Could someone please explain in an easy-to-understand way? 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 - Setuptools "development" Requirements

TL;DR: Is there a way to hook setuptool's 'develop' to install a set of development requirements when running ... method I haven't read about? 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 - Plotting images side by side using matplotlib

I was wondering how I am able to plot images side by side using matplotlib for example something like this ... determine the grid size. 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 - Merging dataframes on index with pandas

I have two dataframes and each one has two index columns. I would like to merge them. For example, the first ... . Do you have any suggestions? 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 - Where is my Django installation?

I use Django but I need to find the default templates and applications. I don't know where it's installed. How can I find that? 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 can I install from a git subdirectory with pip?

I have a git repository with many folders, one of them being a python module installable with pip, like this: ... /pip-88tlLm-build/setup.py' 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 - When to use 'raise NotImplementedError'?

Is it to remind yourself and your team to implement the class correctly? I don't fully get the use of an ... , m, n): raise NotImplementedError See Question&Answers more detail:os...

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

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399 views

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python - How to flatten only some dimensions of a numpy array

Is there a quick way to "sub-flatten" or flatten only some of the first dimensions in a numpy array? For ... dimensions would be (5000,25) 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 proper session handling in multi-thread applications

I have trouble understanding how to properly open and close database sessions efficiently, as I understood by the ... =50) mt_worker.start() 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 - PySpark row-wise function composition

As a simplified example, I have a dataframe "df" with columns "col1,col2" and I want to compute a row-wise ... function "f_udf" and "max_udf." 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 do I unit test PySpark programs?

My current Java/Spark Unit Test approach works (detailed here) by instantiating a SparkContext using "local" and ... unit tests with 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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python - What is the difference between a stack and a frame?

Under what situations would I want to use one over the other? What is the difference between: >>> import inspect ... a stack frame in a nutshell 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 - Import py file in another directory in Jupyter notebook

My question is related to this. I am using Python 3.6 in Jupyter Notebook. My project directory is /user/project. In ... ... How can I 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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python - What does numpy.gradient do?

So I know what the gradient of a (mathematical) function is, so I feel like I should know what numpy. ... ? When is numpy.gradient useful? See Question&Answers more detail:os...

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

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461 views

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python imaging library - pip install PIL doesn't install into virtualenv

How do I install PIL? >pip install PIL Downloading/unpacking PIL Could not find any downloads that satisfy the ... were found to uninstall. 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 - GeoDjango GEOSException error

Trying to install a GeoDjango on my machine. I'm really new to Python and being brought into a project ... sorl-thumbnail stripe pytz==2013b See Question&Answers more detail:os...

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

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484 views

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python - `if __name__ == '__main__'` equivalent in Ruby

I am new to Ruby. I'm looking to import functions from a module that contains a tool I want to continue ... 's the equivalent paradigm in Ruby? See Question&Answers more detail:os...

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

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598 views

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python - DBSCAN for clustering of geographic location data

I have a dataframe with latitude and longitude pairs. Here is my dataframe look like. order_lat order_long 0 ... while clustering? 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 - Understanding Keras LSTMs: Role of Batch-size and Statefulness

Sources There are several sources out there explaining stateful / stateless LSTMs and the role of batch_size which I ... =batch_size, verbose=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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