Recent questions tagged Python

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python - Use slice notation with collections.deque

How would you extract items 3..6 efficiently, elegantly and pythonically from the following deque without altering it: ... work with deque... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Inverting a numpy boolean array using ~

Can I use ~A to invert a numpy array of booleans, instead of the rather awkward functions np.logical_and() and np ... m a little bit worried ... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to get the first word in the string

text is : WYATT - Ranked # 855 with 0.006 % XAVIER - Ranked # 587 with 0.013 % YONG - Ranked # 921 with ... But it gives me the : WYATT - Ranked See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Get exit code and stderr from subprocess call

I read up on the functions provided by subprocess - call, check_call, check_output, and understand how each works ... . Thank you, Ahmed. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to check if a deque is empty

Is try-catch the only method to do that? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to create CMYK halftone Images from a color image?

I am working on a project that requires me to separate out each color in a CYMK image and generate a ... for this process or algorithms? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How do I make processes able to write in an array of the main program?

I am making a process pool and each of them need to write in different parts of a matrix that exists in the main ... which row it was based on. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Excel VLOOKUP equivalent in pandas

I have following dataframe: A B C Index 2001-06-30 100 2001-08-31 (=value of A at date B) 2001 ... too simplistic and produced an error. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Boto Execute shell command on ec2 instance

I am newbie to EC2 and boto. I have an EC2 running instance and I want to execute a shell command like e. ... reference will be a great help. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Radar chart with multiple scales on multiple axes

I want to plot a radar chart with multiple scales on multiple axes using matplotlib. The official API example gives ... axes just like I want. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Creating a tree from self referential tables in SQLalchemy

I'm building a basic CMS in flask for an iPhone oriented site and I'm having a little trouble with ... pages_dict) anyone got any ideas? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Adding Zooming in and out with a Tkinter Canvas Widget?

How would I add zooming in and out to the following script, i'd like to bind it to the mousewheel. If you're ... Tk() GUI(root) root.mainloop() See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Improve speed of reading and converting from binary file?

I know there have been some questions regarding file reading, binary data handling and integer conversion using struct ... struct in any form. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - nose, unittest.TestCase and metaclass: auto-generated test_* methods not discovered

This is a follow-up question for unittest and metaclass: automatic test_* method generation: For this (fixed) ... light on this? Thanks, See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Understanding pandas dataframe indexing

Summary: This doesn't work: df[df.key==1]['D'] = 1 but this does: df.D[df.key==1] = 1 ... //pandas.pydata.org/pandas-docs/stable/indexing.html See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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780 views

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python - Matplotlib: 3D surface plot turn off background but keep axes

I want to do a 3D surface plot that shows axes but does not show the faces that are between the axes. ... you look closely) Thanks in advance! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to speed up API requests?

I've constructed the following little program for getting phone numbers using google's place api but it's pretty slow ... .time() - start_time)) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - TypeError: 'float' object is not callable

I am trying to use values from an array in the following equation: for x in range(len(prof)): PB = ... be greatly appreciated. Thanks in advance See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Seaborn factor plot custom error bars

I'd like to plot a factorplot in seaborn but manually provide the error bars instead of having seaborn ... combined with matplotlib? Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - how to unstack (or pivot?) in pandas

I have a dataframe that looks like the following: import pandas as pd datelisttemp = pd.date_range('1/1/2014', ... t quite get what I want. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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289 views

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python 3.x - Anaconda and upgrading to new M1 Mac

Background I've just got a new M1 mac mini dev machine, and migrated from my old x86 mac using apple's ... arm native version if/when available? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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353 views

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python - Using Sympy Equations for Plotting

What is the best way to create a Sympy equation, do something like take the derivative, and then plot the ... so this is fairly simplified. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Import error: DLL load failed in Jupyter notebook but working in .py file

I installed BreakoutDetection the module in Anaconda environment. When I tried to import the module using import ... this issue? Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - pandas get position of a given index in DataFrame

Let's say I have a DataFrame like this: df A B 5 0 1 18 2 3 125 4 5 where 5, 18, 125 are the index I'd ... like options -C, -A or -B with grep ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Reading csv containing a list in Pandas

I'm trying to read this csv into pandas HK,"[u'5328.1', u'5329.3', '2013-12-27 13:58:57.973614' ... pd.read_csv() with arguments ? thank you See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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216 views

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python - How to update model parameters with accumulated gradients?

I'm using TensorFlow to build a deep learning model. And new to TensorFlow. Due to some reason, my model ... wanted feature? Thanks very much. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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173 views

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python - image information along a polar coordinate system

I have a set of png images that I would like to process with Python and associated tools. Each image ... solve this problem. Thank you. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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558 views

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python - Proper way to use multiprocessor.Pool in a nested loop

I am using the multiprocessor.Pool() module to speed up an "embarrassingly parallel" loop. I actually have a ... benefits of doing so? Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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