Recent questions tagged Python

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python - What's the best way to create a "3D identity matrix" in Numpy?

I don't know if the title makes any sense. Normally an identity matrix is a 2D matrix like In [1]: import ... any elegant way to generate 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 arrow keys from command line

i have a script which should interact with the users input (pressing the arrow keys), but i cannot get the ... react on the input immediately? 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 correctly use Flask's jsonify() to return json?

I'm having a little trouble using the flask.jsonify function to output a formatted json response from a dictionary ... that I am looking for? 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 - OSError: [WinError 740] The requested operation requires elevation

I am having a simple code which has an image called "try.png" and I want to convert it from Image to Text ... on how to over come this error 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 - ValueError: Field 'id' expected a number but got 'Processing'

I'm going to deploy my django application on DigitalOcean. Everything gone well, except following error, and ... self): return self.sender_name See Question&Answers more detail:os...

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

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603 views

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python - Half of the world masked when using maskoceans in Basemap

I would like to mask oceans when plotting the data from a netCDF dataset. I followed the great instructions given ... plotted (land + oceans). See Question&Answers more detail:os...

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

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427 views

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python - Sort N-D numpy array by another 1-D array

From the answer to this question (Sort a numpy array by another array, along a particular axis, using less memory), I ... of the 1-D array b? 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 - ImportError: cannot import name '_BACKCOMPAT_MAGIC_NUMBER'

Trying to use pip to install just installed another version of python (3.4) get error ImportError: cannot import name '_BACKCOMPAT_MAGIC_NUMBER' 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 - Plotting a dictionary with multiple values per key

I have a dictionary that looks like this: 1: ['4026', '4024', '1940', '2912', '2916], 2: [' ... so any help 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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python - thread-safe random number generation with cython

I am trying to cythonise something I did which involves random number generation inside a parallelised loop. I wanted ... a more standard way? See Question&Answers more detail:os...

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

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1.0k views

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python - Get indices of top N values in 2D numpy ndarray or numpy matrix

I have an array of N-dimensional vectors. data = np.array([[5, 6, 1], [2, 0, 8], [4, 9, 3 ... top N pairwise distances from an array of vectors? See Question&Answers more detail:os...

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

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549 views

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python - Render image without saving

I want to get an image from user, work with it at beckend and render result back to user. Is it possible to do ... }} returns a name of file. 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 - Selenium Firefox webdriver results in error: Service geckodriver unexpectedly exited. Status code was: 2

I'm writing a program that will search a website for specific entries inside of articles, I'm using selenium ... with python version 2.7.12 See Question&Answers more detail:os...

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

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693 views

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python - Pandas Dataframe - for each row, return count of other rows with overlapping dates

I've got a dataframe with projects, start dates, and end dates. For each row I would like to return the number of ... C 2019-06-08 2019-08-01 2 See Question&Answers more detail:os...

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

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930 views

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python - Displaying square Tkinter.Button's?

Why does this code display buttons taller than they are wide? import Tkinter, tkFont top = Tkinter.Tk() right = ... do I prevent this resizing? 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 apply euclidean distance function to a groupby object in pandas dataframe?

I have a set of objects and their positions over time. I would like to get the average distance between ... distances. Any help 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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798 views

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python - forcing ctypes.cdll.LoadLibrary() to reload library from file

I have the following code import ctypes lib1 = ctypes.cdll.LoadLibrary("./mylib.so") # modify mylib.so (code ... the library from the hard disk? See Question&Answers more detail:os...

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

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456 views

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python - How to make labels appear when hovering over a point in multiple axis?

I'm trying to show hover label on matplotlib with multiple axis. I'm using python 3.6.8 with matplotlib 3 ... labels when using multiple axis ? 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 - Vertical text in Tkinter Canvas

Is there a way to draw vertical text in Tkinter library? (Python recommended) textID = w1.create_text(5, 5, anchor=" ... = "This is some text") See Question&Answers more detail:os...

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

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458 views

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python - Writing unicode data in csv

I know similar kind of question has been asked many times but seriously i have not been able to properly implement ... i am doing wrong here?? See Question&Answers more detail:os...

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

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690 views

1 answer

python 2.7 - Find Indexes of Non-NaN Values in Pandas DataFrame

I have a very large dataset (roughly 200000x400), however I have it filtered and only a few hundred values remain, the rest ... (4,0), (4,2)]. See Question&Answers more detail:os...

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

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479 views

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python - Making objects iterable?

I'm trying to iterate over each row in a list of lists, append an element from each row to a new list, then ... If not, what's a better one? See Question&Answers more detail:os...

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

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746 views

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python - How can I make a lot of buttons at dynamic in kv language?

I want to make a lot of Buttons at dynamic in kv language. But now I cannot...... I will show now source under ... : root.X(i) How can I 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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675 views

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python - Scrapy Limit Requests For Testing

I've been searching the scrapy documentation for a way to limit the number of requests my spiders are allowed to ... . Any thoughts? 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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478 views

1 answer

python - Invert negative values in a list

I am trying to convert a list that contains negative values, to a list of non-negative values; inverting the negative ones. ... 4,5,6,7,8,9,10] See Question&Answers more detail:os...

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

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609 views

1 answer

python / kivy .kv file wont read

I have just started learning to program I have a really basic App based on a pong game tutorial on the kivy.org site ... root.top - 50 text: "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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979 views

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python - Fitting a Gaussian to a histogram with MatPlotLib and Numpy - wrong Y-scaling?

I have written the below code to fit a Gaussian curve to a histogram. It seems to work, although the Y scaling ... ,sigma)) plt.show() 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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470 views

1 answer

python - How to deserialise enumeration with string representation?

I would like to create a class, which has an enumeration as an attribute. This enumeration should have a ... string and not an enumeration. See Question&Answers more detail:os...

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

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