Recent questions tagged Python

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python - How to split a matrix into 4 blocks using numpy?

I'm implementing Strassen's Matrix Multiplication using python. In divide step, we divide a larger matrix into smaller ... to split a matrix? 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 - Getting a list from a config file with ConfigParser

I have something like this in my config file (a config option that contains a list of strings): [filters] ... different module? (Using python3.) See Question&Answers more detail:os...

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

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431 views

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python - Django order_by sum of fields

Is it possible to use the django ORM to order a queryset by the sum of two different fields? For example, ... such a thing possible with django? See Question&Answers more detail:os...

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

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685 views

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python - Flask-MongoEngine & PyMongo Aggregation Query

I am trying to make an aggregation query using flask-mongoengine, and from what I have read it does not sound like it is ... " }, "count" : 6 } 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 error "Can only use .str accessor with string values"

I have the following input file: "Name",97.7,0A,0A,65M,0A,100M,5M,75M,100M,90M,90M,99M,90M,0#,0N#, And I am ... does not work in pandas 0.17.0. 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 - Do Cython extension types support class attributes?

Python classes can have class attributes: class Foo(object): bar = 4 Is there an analogous construct for defining ... failed with exit status 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 - What to use instead of bokeh.charts

I am trying to run some code written by someone else, which contains the line from bokeh.charts import Bar When ... so, is there an alternative? 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 - Security considerations of `pip --allow-external`

What are the security considerations of using --allow-external or --allow-all-externals options of pip? The ... that would do so either. 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 - Packing 4 Integers as ONE BYTE?

I have four integers {a, b, c, d} that can have the following range of values: a - {0 or 1} (1 bit) ... how do I do the bits packing/unpacking? 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 - pd.rolling_mean becoming deprecated - alternatives for ndarrays

EDIT: This question was asked in 2016 and similar questions have been posted on SO years later after the ... as fast as pd.rolling_mean? See Question&Answers more detail:os...

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

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506 views

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python - Build error with variables and url_for in Flask

Have found one or two people on the interwebs with similar problems, but haven't seen a solution posted anywhere. ... : xx://myproject.com/ See Question&Answers more detail:os...

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

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700 views

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python - How to set the margins for a matplotlib figure?

I am generating an on-screen figure that has two subplots: one is an image and the other is a graph. The ... autoscale(axis='x', tight=True) 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 - pyyaml and using quotes for strings only

I have the following YAML file: --- my_vars: my_env: "dev" my_count: 3 When I read it with PyYAML and dump ... variable names in the YAML file? See Question&Answers more detail:os...

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

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575 views

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python - How to efficiently submit tasks with large arguments in Dask distributed?

I want to submit functions with Dask that have large (gigabyte scale) arguments. What is the best way to do ... or results in memory errors. See Question&Answers more detail:os...

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

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523 views

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python - Use StringIO as stdin with Popen

I have the following shell script that I would like to write in Python (of course grep . is actually a much ... to mix both strings and files. See Question&Answers more detail:os...

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

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481 views

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python - Doing a bitwise operation on bytes

I got two objects, a and b, each containing a single byte in a bytes object. I am trying to do a ... think of the host system's endianness? 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 Pandas index in Plotly Express

Plotly Express allows me to easily plot a pandas dataframe, as explained in their examples. Rather than using a ... "sepal_length") fig.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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809 views

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python - pytest fixtures in a separate directory

I'm looking to create a pytest structure where I can separate the fixtures from the tests completely. The ... subdirectory when using pytest? See Question&Answers more detail:os...

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

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283 views

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python - Configuring the logging of a third party script

I have a third party python console script, which source I don't want to modify. But I want to configure ... pth file would an simple answer. See Question&Answers more detail:os...

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

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430 views

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python - subprocess and Type Str doesnt support the buffer API

I have cmd = subprocess.Popen('dir',shell=True,stdout=subprocess.PIPE) for line in cmd.stdout: columns = line.split ... wrong i am on Python 3.3 See Question&Answers more detail:os...

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

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629 views

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python - AttributeError: 'str' object has no attribute 'decode' in fitting Logistic Regression Model

I am currently trying to create a binary classification using Logistic regression. Currently I am in determining the ... , and no strings. See Question&Answers more detail:os...

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

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376 views

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python - Conda list shows a package but cannot import it

Here an issue i'm having on a conda Virtual env. I'm using ubuntu 64b guest on windows 7 host with Virtual ... /envs/universe/bin/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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282 views

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python - CSV Module AttributeError

So I copied and pasted a demo program from the book I am using to learn Python: #!/usr/bin/env python import ... .py, but forgot to delete csv See Question&Answers more detail:os...

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

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905 views

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python - How can I use break and continue in Django templates?

I want to put break and continue in my code, but it doesn't work in Django template. How can I use continue and break ... } AM</td> {% endfor %} See Question&Answers more detail:os...

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

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826 views

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python - Swap two values in a numpy array.

Is there something more efficient than the following code to swap two values of a numpy 1D array? input_seq = ... ix1] input_seq[ix1] = temp See Question&Answers more detail:os...

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

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489 views

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python - Convert "unknown format" strings to datetime objects?

This is probably a very basic question but after reading documentation I still can't figure out how to do it.. ... they can be compared? 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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460 views

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python - Change value of currently iterated element in list

problem: when you use construction for a in _list_: print a it prints every item in array. But you can't ... & sign, is passed as reference) See Question&Answers more detail:os...

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

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430 views

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python - How to make nosetests use python3

I try to use nosetests ? nosetests '/pathTo/test' but it uses python 2.7 for my tests: sys.version_info(major ... How to make nose use python3? See Question&Answers more detail:os...

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

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