Recent questions tagged Python

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python - Flask CLI shows "TypeError: exceptions must derive from BaseException"

When I run Flask from the terminal with flask run, if my code has an error I see "TypeError: ... : exceptions must derive from BaseException 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 - How to scroll two parallel text widgets with one scrollbar?

I need to scroll a "line number" text widget and a "code" text widget simultaneously in an IDE I'm developing. How would I achieve 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 - Using multiple mapper inputs in one streaming job on hadoop?

In java I would use: MultipleInputs.addInputPath(conf, path, inputFormatClass, mapperClass) to add multiple inputs ... similiar job be done? 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 - Problem using os.system() with sed command

I'm writing a small method to replace some text in a file. The only argument I need is the new text, as ... anyone knows what is wrong? 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 - PIL crop and paste problem: Cropping doesn't create a cropped image

I'm trying to crop an image and then paste the cropped image into the centre of another image. Ideally I'd ... on this would be great 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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581 views

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python - Pandas - Get values within parentheses of a panda dataframe column

My df has 2 columns: Name Attr a(bc) b(aca) (cba) I would like the column Attr to have the ... string or buffer Really appreciate any 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 - Pass scraped URL's from one spider to another

How can I send the scraped URL's from one spider to the start_urls of another spider? Specifically, I want to run ... { 'url': response.url } 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 - Why does targeting shadow dom elements fail at the 5th element?

Recently asked how to target elements in chrome settings here: How to edit chromes search and homepage with ... finished with exit code 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 - How to make a flashing text box in tkinter?

So my computing class are making a xmas card in python, and for one of the bits there is going to be a text ... =0, column=0) root.mainloop() 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 - Formatting microseconds to two decimal places (in fact converting microseconds into tens of microseconds)

I am using the following to print out timestamps: strftime('%d-%m-%Y %H:%M:%S.%f') However I want to round ... formatting a new 'print string'? See Question&Answers more detail:os...

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

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384 views

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python - Django relation error when running make migrations

Hey I am attempting to initialize a new database, but I am running into some issues setting up the migrations. The ... , blank=False, null=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 3.x - Linear Programming - Google ortools - incorrect decision variable final values

I am trying to solve a linear programming problem. Following are specs of the problem: I have a network flow problem ... } main(cfg, 'cost') See Question&Answers more detail:os...

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

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647 views

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python - Finding the top n values in a row of a scipy sparse matrix

I have a scipy sparse matrix in CSR format. It's 72665x72665 so it's impractical to convert this matrix to a ... can do for a sparse 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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568 views

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python - Query with paging by cursor causes error because of limitations for "IN filter" in cursor() method... What should be the alternative?

I am developing a twitter like microblogging system by using the following models: class Member(db.Model): user = db. ... , I've changed 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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501 views

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python - Descriptive stats from frequency table in pandas

I have a frequency table of test scores: score count ----- ----- 77 1105 78 940 79 1222 80 ... about applying weights to individual cases.) 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

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python - Flask global variables and sessions

If I have global variables in flask and have multiple users accessing the site at once, can one persons ... requested from a users 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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411 views

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python - Faster method for adjusting PIL pixel values

I'm writing a script to chroma key (green screen) and composite some videos using Python and PIL (pillow). I can key ... but I'm at a loss... See Question&Answers more detail:os...

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

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502 views

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python - How to fix mpl_finance package for MatPlotLib?

Getting this error message: MatplotlibDeprecationWarning: The finance module has been deprecated in mpl 2.0 and ... yahoo_finance import Share See Question&Answers more detail:os...

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

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590 views

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python - How do I keep whitespace in BeautifulSoup.contents

Most examples I find online show how to remove whitespace - but in my case I need to keep it.. I ... contents of a given beautifulsoup parser? See Question&Answers more detail:os...

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

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426 views

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python - Getting the final destination of a javascript redirect on a website

I parse a website with python. They use a lot of redirects and they do them by calling javascript functions. ... where the redirect takes me. See Question&Answers more detail:os...

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

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955 views

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python - ModuleNotFoundError: No module named 'requests' after pip install

I know similar questions have been asked before but I couldn't find the solution to my problem. I am ... already satisfied. Thanks in advance. See Question&Answers more detail:os...

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

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416 views

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python - Pass argument to flask from javascript

When pressing a button i call a javascript function in my html file which takes two strings as parameters (from ... but its not possible... See Question&Answers more detail:os...

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

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570 views

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python - Bug (?) on selecting knots on scipy.insterpolate's splrep function

I have this question regarding scipy's splrep function, which I think is a bug, so I'll post every piece of code ... you know what's going 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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971 views

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python - Pyaudio How to get sound on only one speaker

I'm using pyaudio in a school project and I'm trying to get the sound to play on only one speaker at a time ... . Does anybody know what to 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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614 views

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python - Scrapy put two spiders in single file

I have written two spiders in single file. When I ran scrapy runspider two_spiders.py, only the first Spider ... second spider definition ... See Question&Answers more detail:os...

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

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342 views

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python - How to print out Structured Stream in Console format

I am learning Structured Streaming with Databricks and I'm struggling with the DataStreamWriter console mode. My ... sentence. Sixth sentence. 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 - change font size of facet titles using seaborn facetgrid heatmap

Note: this is a different question than "How can I change the font size using seaborn FacetGrid?". The ... fontweight='bold', fontsize=18) See Question&Answers more detail:os...

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

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384 views

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python - Is it possible to scale data by group in Spark?

I want to scale data with StandardScaler (from pyspark.mllib.feature import StandardScaler), by now I can do it ... for x in clean_line_split])) See Question&Answers more detail:os...

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

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