Recent questions tagged PYTHON

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python - Filter by whether column value equals a list in Spark

I'm trying to filter a Spark dataframe based on whether the values in a column equal a list. I would like to ... a is array (nullable = 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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393 views

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python - Webdriver error: "No alert is present" after UnexpectedAlertPresentException is thrown

I'm trying to test a webapp I'm developing. I'm using the Firefox driver against Firefox 22.0 ... assuming the WebDriverException is indicating. See Question&Answers more detail:os...

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

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490 views

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python - Is it possible to append to an xarray.Dataset?

I've been using the .append() method to concatenate two tables (with the same fields) in pandas. Unfortunately this ... another way to do 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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242 views

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python - How to check if an object is created with `with` statement?

I would like to ensure that the class is only instantiated within a "with" statement. i.e. this one is ... How can I ensure such functionality? 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 one replace an element with text in lxml?

It's easy to completely remove a given element from an XML document with lxml's implementation of the ElementTree ... easy way of doing 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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368 views

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python - Delete newline / return carriage in file output

I have a wordlist that contains returns to separate each new letter. Is there a way to programatically delete ... achieve. wfile.delete(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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299 views

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python - How to use timeit when timing a function

Let me start off by saying I know almost nothing about python but have to write a program in three different ... to after A was executed. See Question&Answers more detail:os...

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

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297 views

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python - Getting <generator object <genexpr>

I have 2 lists: first_lst = [('-2.50', 0.49, 0.52), ('-2.00', 0.52, 0.50)] second_lst = [('-2 ... at 0x0223E2B0>] Can you help me fix the code? See Question&Answers more detail:os...

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

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620 views

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python - Django admin returns 404 on POST, 200 on GET

On production server, when I try to edit/create an object then saving fails, returning 404. This only occurs ... this seems to be change_view See Question&Answers more detail:os...

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

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280 views

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python - Keras Concatenate Layers: Difference between different types of concatenate functions

I just recently started playing around with Keras and got into making custom layers. However, I am rather confused by the ... add(), and so on. See Question&Answers more detail:os...

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

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451 views

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python - beautifulsoup won't recognize lxml

I'm attempting to use lxml as the parser for BeautifulSoup because the default one is MUCH slower, however i'm ... 2.9.0 and still nothing See Question&Answers more detail:os...

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

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539 views

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python - How to test send_file flask

I have a small flask application which takes some images for upload and converts them into a multipage tiff. ... file from the response object? See Question&Answers more detail:os...

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

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263 views

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python - module 'pip' has no attribute 'pep425tags'

When I am trying to install .whl with pip it said: is not a supported wheel on this platform to solve ... attribute 'pep425tags' What's wrong? See Question&Answers more detail:os...

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

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745 views

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python - Intersecting matplotlib graph with unsorted data

When plotting some points with matplotlib I encountered some strange behavior when creating a graph. Here is the code ... from x1 to y1. See Question&Answers more detail:os...

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

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229 views

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python - Add entry to beginning of list and remove the last one

I have a list of about 40 entries. And I frequently want to append an item to the start of the list (with id ... of the entries to the next id. See Question&Answers more detail:os...

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

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411 views

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python - In pandas, what's the difference between df['column'] and df.column?

I'm working my way through Pandas for Data Analysis and learning a ton. However, one thing keeps coming up. ... c Name: column1, dtype: object See Question&Answers more detail:os...

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

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375 views

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python - Cannot get environment variables in Django settings file

I'm trying to read some environment variables in Django settings, which i have defined in /home/user/. ... Running on Apache with mod_wsgi. See Question&Answers more detail:os...

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

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339 views

1 answer

python - Filter based on another RDD in Spark

I would like to keep only the employees which does have a departement ID referenced in the second table. Employee ... a Scala or Python 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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715 views

1 answer

python - isinstance fails for a type imported via package and from the same module directly

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

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232 views

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python - How can I get my setup.py to use a relative path to my files?

I'm trying to build a Python distribution with distutils. Unfortunately, my directory structure looks like this: ... to what distutils expects? See Question&Answers more detail:os...

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

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529 views

1 answer

python - Access value, column index, and row_ptr data from scipy CSR sparse matrix

I have a large matrix that I would like to convert to sparse CSR format. When I do: import scipy as sp Ks = ... I missing? Thanks for 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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263 views

1 answer

python - TensorFlow 1.14.0 is not using GPU

I set up TensorFlow using pip install --user tensorflow-gpu on my Ubuntu 19.04 laptop. All dependencies like CUDA, ... NumDevs = 1 Result = PASS See Question&Answers more detail:os...

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

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581 views

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python 2.7 - Why does ElementTree reject UTF-16 XML declarations with "encoding incorrect"?

In Python 2.7, when passing a unicode string to ElementTree's fromstring() method that has encoding="UTF ... more than absolutely necessary. See Question&Answers more detail:os...

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

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356 views

1 answer

python - How can I add a Picture to a QWidget in PyQt4

How can I add or import a picture to a QWidget? I have found a clue. I can add a Label and add a ... use is, QLabel.setPicture(self.QPicture). See Question&Answers more detail:os...

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

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586 views

1 answer

python - using SciPy to integrate a function that returns a matrix or array

I have a symbolic array that can be expressed as: from sympy import lambdify, Matrix g_sympy = Matrix([[ x, 2 ... the print.txt file. 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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644 views

1 answer

python - RuntimeError: expected scalar type Long but found Float

I can't get the dtypes to match, either the loss wants long or the model wants float if I change my ... scalar type Long but found Float 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

1 answer

python - Write OpenCV image in memory to BytesIO or Tempfile

I need to write an OpenCV image that sits in memory to a BytesIO or Tempfile object for use elsewhere. I am ... I want to avoid needless copies. 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

1 answer

python - In Tensorflow's Dataset API how do you map one element into multiple elements?

In the tensorflow Dataset pipeline I'd like to define a custom map function which takes a single input element (data sample) ... (30) (31) (32) See Question&Answers more detail:os...

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

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