Recent questions tagged Python

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python - How to set connection timeout in SQLAlchemy

I'm trying to figure out how to set the connection timeout in create_engine(), so far I've tried: create_engine(url ... =10) What should I do? 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 - Prevent Flask jsonify from sorting the data

Each time I use jsonify, I get the JSON keys sorted alphabetically. I don't want the keys sorted. Can I ... ': permissions} return jsonify(data) 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 - Can you fool isatty AND log stdout and stderr separately?

Problem So you want to log the stdout and stderr (separately) of a process or subprocess, without the output being ... heart of 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 - Adding extra data to Django Rest Framework results for entire result set

I'm using Django Rest Framework and need to add extra data to a result set. Specifically, where you would ... proven wrong on that score. 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 - use a css stylesheet on a jinja2 template

I am making a website using html, css, flask and jinja2. I have a page working on a flask server, ... /template.html /templates/styles.css 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 - UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2

I am creating XML file in Python and there's a field on my XML that I put the contents of a text file. I ... XML is not viewable on my browser. 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 - logging setLevel, how it works

In the logging howto documentation there is this example: import logging # create logger logger = logging. ... ch.setLevel(logging.INFO) 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 - Who runs the callback when using apply_async method of a multiprocessing pool?

I'm trying to understand a little bit of what's going on behind the scenes when using the apply_sync method ... the results will get blocked. 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 get a list of indices of non zero elements in a list?

I have a list that will always contain only ones and zeroes. I need to get a list of the non-zero indices ... 'pythonic' way of achieving 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 - How to determine if an exception was raised once you're in the finally block?

Is it possible to tell if there was an exception once you're in the finally clause? Something like: try: ... log_fn(record.msg, record.args) See Question&Answers more detail:os...

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

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816 views

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python - Seaborn Heatmap with logarithmic-scale colorbar

Is there a way to set the color bar scale to log on a seaborn heat map graph? I am using a pivot table ... 128,cmap=plt.cm.YlOrRd_r) 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 - TypeError: string indices must be integers, not str // working with dict

I am trying to define a procedure, involved(courses, person), that takes as input a courses structure and a person ... can I fix that? 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 - Using py.test with coverage doesn't include imports

For Jedi we want to generate our test coverage. There is a related question in stackoverflow, but it didn't ... Jedi. It's publicly 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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257 views

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python - f.write vs print >> f

There are at least two ways to write to a file in python: f = open(file, 'w') f.write(string) or f = ... but I don't need a templating engine). See Question&Answers more detail:os...

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

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447 views

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python - Using a comparator function to sort

So I'm working with a few pre-existing comparators that compare certain values in two tuples and return ... change the comparator functions. See Question&Answers more detail:os...

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

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327 views

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python - Extract matplotlib colormap in hex-format

I am trying to extract discrete colors from a matplotlib colormap by manipulating this example. However, I cannot find ... ') colorbar() show() 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 perform a left join in SQLALchemy?

I have a SQL query which perfroms a series of left joins on a few tables: SELECT <some attributes> FROM table1 ... make the join a LEFT JOIN. 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 - SyntaxError: Generator expression must be parenthesized

I just installed django and after installing that I created a django project and was trying to run django ... expression must be parenthesized 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 - Is it possible to have multiple PyPlot windows? Or am I limited to subplots?

I'm not sure how to word my question more clearly. Basically, is PyPlot limited to one instance/window? Any ... until the first one is closed. 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 - Django : Can't import 'module'. Check that module AppConfig.name is correct

Might look like an already answered question, actually here you have the same problem (kind of) i had. My problem ... in advance for you 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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334 views

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python - Creating a postgresql DB using psycopg2

I'm trying to create a postgres DB using a python script. Some research showed that using the psycopg2 module might ... way of doing 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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374 views

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python - Creating a pandas DataFrame from columns of other DataFrames with similar indexes

I have 2 DataFrames df1 and df2 with the same column names ['a','b','c'] and indexed by dates. The date ... 2014-01-08) Thanks for your 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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221 views

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python - How to know current name of the database in Django?

I'm writing tests in my django project. For now, I have two database connections: (settings.py) DATABASES = { ' ... (1) but it does not 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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326 views

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python - How to convert Counter object to dict?

Data frame: pair = collections.defaultdict(collections.Counter) e.g. pair = {'doc1': {'word1':4, 'word2':3} ... data type is dict, not Counter. See Question&Answers more detail:os...

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

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362 views

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python - can't multiply sequence by non-int of type 'float'

level: beginner why do i get error "can't multiply sequence by non-int of type 'float'"? def nestEgVariable(salary, ... ,4,5,0,3]) thanks Baba See Question&Answers more detail:os...

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

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307 views

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python - Django ORM - objects.filter() vs. objects.all().filter() - which one is preferred?

Very often I see constructs like MyModel.objects.all().filter(...) which will return a QuerySet of the ... methods in a undesirable 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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333 views

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python - Matplotlib/pyplot: How to enforce axis range?

I would like to draw a standard 2D line graph with pylot, but force the axes' values to be between 0 and 600 ... () etc. Any thoughts? 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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456 views

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python - How do I return a 401 Unauthorized in Django?

Instead of doing this: res = HttpResponse("Unauthorized") res.status_code = 401 return res Is there a way to do it without typing it every 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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