Recent questions tagged Python

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python - How do I improve the performance of pandas GroupBy filter operation?

This is my first time asking a question. I'm working with a large CSV dataset (it contains over 15 million rows ... How can I speed this up? 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 - Removing a prefix from a string

Trying to strip the "0b1" from the left end of a binary number. The following code results in stripping all ... . (see my previous question) 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 all text from an XML document?

How can I get all the text content of an XML document, as a single string - like this Ruby/hpricot ... XML tags with a single whitespace. 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 longest (string) key in dictionary

This question is similar to Python - Find longest (most words) key in dictionary - but I need the pure number of ... group 1000': 0} Output: 10 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 - urllib "module object is not callable"

This is my third python project, and I've received an error message: 'module object' is not callable. I ... 'module' object is not callable 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 put the legend on first subplot of seaborn.FacetGrid?

I have a pandas DataFrame df which I visualize with subplots of a seaborn.barplot. My problem is that I want ... to anywhere in the grid? 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 - cython: relative cimport beyond main package is not allowed

I am trying to use explicit relative imports in cython. From the release notes it seems like relative imports ... my issue is different. See Question&Answers more detail:os...

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

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726 views

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python - formatting timedelta64 when using pandas.to_excel

I am writing to an excel file using an ExcelWriter: writer = pd.ExcelWriter(fn,datetime_format=' d hh: ... formatting using pd.ExcelWriter? 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 - os.walk() strips polish characters

So what I'm trying to do is fix some id3tags of mp3 files. It all works, except for files with any kind of ... ' error. How can this be fixed? 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 - Implementation of numpy in1d for 2D arrays?

I have a 2D numpy array S representing a state space, with 80000000 rows (as states) and 5 columns (as state ... simple to make K=K[Sel]] See Question&Answers more detail:os...

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

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573 views

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python - AttributeError: 'NoneType' object has no attribute '_root'

I am completely new to Python 3, just following simple exercises from YouTube. https://www.youtube.com/watch?v= ... What am I doing 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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281 views

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python - argparse - disable same argument occurrences

I'm trying to disable same argument occurences within one command line, using argparse ./python3 --argument1= ... to disable this behaviour? See Question&Answers more detail:os...

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

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389 views

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python - How to plot geodesic curves on a surface embedded in 3D?

I have in mind this video, or this simulation, and I would like to reproduce the geodesic lines on some sort ... GitHub. Thank you very much! See Question&Answers more detail:os...

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

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264 views

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python - What are the differences between the purposes of generator functions and asynchronous generator functions

In Python, asynchronous generator functions are coroutines, and generator functions are also coroutines. What are ... functions? 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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146 views

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python - Numbers of Day in Month

I have a data frame with a date time index, and I would like to multiply some columns with the ... use that without massive inefficiency. See Question&Answers more detail:os...

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

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204 views

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python - How can I show the output of two print statements on the same line?

I have 2 separate print statements: print "123" print "456" How can i make these 2 print statement appear ... 2 print statements output: 123456 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 - In Pandas, how to convert a string to a datetime object with milliseconds?

I have a column of event's timestamp in my dataframe, looks like "2016-06-10 18:58:25:675", the last ... occurs saying "Unknown string format". See Question&Answers more detail:os...

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

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250 views

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python - Terminal - How to overwrite many lines?

I want to overwrite the hello. But when a was printed i can't come back to that line. So what do applications ... print 'huhu', print ' nooooo ' See Question&Answers more detail:os...

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

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175 views

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python - how to sort by a computed value in django

Hey I want to sort objects based on a computed value in django... how do I do it? Here is an example User ... ) Thanks for your help everyone :) See Question&Answers more detail:os...

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

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214 views

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python - Using Pandas Styler

This may be a very dumb question, but I cannot seem to see the output of the Pandas Styler. I use the ... how can I actually visualize 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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348 views

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python - ImportError: No module named 'queue' while running my app freezed with cx_freeze

I am using python 3.4. I am able to run my python script without any problem. But While running my freezed ... please see me as novice in 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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233 views

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python - Migration clashes with forms.py

The command python manage.py makemigrations fails most of time due to the forms.py, in which new models or new ... way to avoid those 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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356 views

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python - Pickle figures from matplotlib

I am trying to recreate the simple pickle figure example from the question: Saving interactive Matplotlib figures, ... the problem appreciated. See Question&Answers more detail:os...

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

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443 views

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python - Convert string to timedelta in pandas

I have a series where the timestamp is in the format HHHHH:MM: timestamp = pd.Series(['34:23', '125:26', '15234 ... . 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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python - "after" looping indefinitely: never entering mainloop

This is my first post. I started coding when considering a career swap two months ago and am working on a ... updateBoard()) Game = game() 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 - Efficient pairwise correlation for two matrices of features

In Python I need to find the pairwise correlation between all features in a matrix A and all features in a ... .621071009239, # -0.421539304112] See Question&Answers more detail:os...

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

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226 views

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python - Selecting data from Pandas dataframe based on criteria stored in a dict

I have a Pandas dataframe that contains a large number of variables. This can be simplified as: tempDF = ... would be greatly appreciated. See Question&Answers more detail:os...

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

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625 views

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python - Numpy efficient matrix self-multiplication (gram matrix)

I want to multiply B = A @ A.T in numpy. Obviously, the answer would be a symmetric matrix (i.e. B[i ... there a way to perform this optimally? See Question&Answers more detail:os...

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

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