Recent questions tagged Python

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python - sklearn: calculating accuracy score of k-means on the test data set

I am doing k-means clustering on the set of 30 samples with 2 clusters (I already know there are two classes) ... of k-means? 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 - Type hint for nested dict

The kind of data structure I parse in my Python script is a json file which, after json.load(file_handle), is ... better way to type-hint 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 - pyspark: Method isBarrier([]) does not exist

I'm trying to learn Spark following some hello-word level example such as below, using pyspark. I got a "Method ... hadoop 2.7 pyspark 2.4.0 See Question&Answers more detail:os...

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

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python - How to use class name in class scope?

I'm not very familiar with Python. So I have some problem while I code. It's very normal to use ... explanation or official material about 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 - Get a random sample of a dict

I'm working with a big dictionary and for some reason I also need to work on small random samples from that ... can't foresee any future issue 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 - Avoid or delay evaluation of things which may not be used

How can lazy evaluation be achieved in Python? A couple of simple examples: >>> def foo(x): ... print(x ... like the above to evaluate lazily. 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 - Scrapy : How to pass list of arguments through command prompt to spider?

Creating a scraper for fantasy team. Looking for a way to pass a list of the players names as arguments, and ... right way to do it afterwards! 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 - Confidence intervals for model prediction

I am following along with a statsmodels tutorial An OLS model is fitted with formula = 'S ~ C(E) + ... intervals) in statsmodels? 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 - Grouping and auto increment based on columns in pandas

i have a pandas frame that looks like this: Is there a way to add the numbers in the last column without having ... po 11/28/2014 B po 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 - What is the recommended way to persist (pickle) custom sklearn pipelines?

I have built an sklearn pipeline that combines a standard support vector regression component with some custom ... regressor after unpickling? 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 - Twisted starting/stopping factory/protocol less noisy log messages

Is there a way to tell to twistd to not log all factory and protocol start and stop. I use many type ... way to disable those messages. Regards 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 - Correct way to get allowed arguments from ArgumentParser

Question: What is the intended / official way of accessing possible arguments from an existing argparse.ArgumentParser ... for this task? 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 plot with x-axis at the top of the figure?

I would like to ask how to produce a plot similar to that in the figure below? Basically, how to have x ... /10/light-attenuation-in-ocean.html 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 - Find euclidean distance from a point to rows in pandas dataframe

i have a dataframe id lat long 1 12.654 15.50 2 14.364 25.51 3 17.636 32.53 5 12.334 25.84 9 ... or iterate over rows to give me distances. 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 - Value Error with color array when slicing values for scatter plot

I want to specify the frequency of markers that are printed in my scatter plot. After being unsuccessful with ... help is appreciated. 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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670 views

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python - Split S3 file into smaller files of 1000 lines

I have a text file on S3 with around 300 million lines. I'm looking to split this file into smaller files of ... run this on my local drive? 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 - Define a pytest fixture providing multiple arguments to test function

With pytest, I can define a fixture like so: @pytest.fixture def foo(): return "blah" And use it in a ... Is such a thing possible with 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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python - Exception TypeError warning sometimes shown, sometimes not when using throw method of generator

There is this code: class MyException(Exception): pass def gen(): for i in range(3): try: yield ... something wrong with custom exception? 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 - Tkinter importing without *?

In my past programming i used the following code: from tkinter import * Gui = Tk() but someone told me that ... of the tkinter modules...??? 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 - Matplotlib ion() and subprocesses

I am trying to have a plot pop up so the user can confirm that a fitting worked, but not hang up the entire ... Is there a way to 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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459 views

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python - Strange error while using Pycharm to debug PyQt gui

I've been using PyCharm to debug my gui in PyQt. This has been really successful thus far, until I've run ... run into any of these 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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python - Distutils compiler options configuration

Maybe a stupid question, but I was wondering where Python's distutils get the compiler options from? It gets some linked ... 10.8.3 Cheers, U. 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 - matplotlib latex in legend label vs in axis label

For matplotlib, you can label legends and axis labels using tex command syntax. You're supposed to prepend r to the ... not really)") plt.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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508 views

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python - Can someone please explain this weird Pygame importing convention?

I see that people usually import Pygame like this: import pygame from pygame.locals import * I don't understand what ... it once it's imported? 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 - perform a google search and return the number of results

The Google Web Search APIs appear to be dead (both the old SOAP and the newer AJAX). Is there a quick ... service, and is thus not recommended. 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 - gtk treeview: place image buttons on rows

For each row in my treeview, I want 4 image buttons next to each other. They will act like radio buttons ... gtk.treeview clickable. any ideas? See Question&Answers more detail:os...

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

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348 views

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python - Using OpenCV with PyInstaller

I am getting an error when trying to create a binary executable of a Python program with PyInstaller. However, ... would be helpful. 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 - Itertools equivalent of nested loop "for x in xs: for y in ys..."

I have a nested loop to create all combinations in a set of conjugated verbs. The aim to to get all ... the nesting, perhaps using itertools? See Question&Answers more detail:os...

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

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