Recent questions tagged Python

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python - What's the difference between () vs [] vs {}?

What's the difference between () vs [] vs {} in Python? They're collections? How can I tell when to use which? See Question&Answers more detail:os...

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

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324 views

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python - Understanding tf.extract_image_patches for extracting patches from an image

I found the following method tf.extract_image_patches in tensorflow API, but I am not clear about its ... that already achieves 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 - django static files versioning

I'm working on some universal solution for problem with static files and updates in it. Example: let's say there ... file... any thoughts ? 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 - Create new class instance from class method

I want to be able to create a new instance of an object by calling a method on an already instantiated object. ... (with organism = Organism())? 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 - Sqlalchemy delete subquery

I am trying to delete some child rows using a filtered query without result: sl = DBSession.query(Puesto.id).filter ... is... Any idea? 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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389 views

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python - Django Model Mixins: inherit from models.Model or from object?

This is a question about Python Mixins that might be useful in general. I'm just using Django models as ... simple Python mixins vs Python ABCs See Question&Answers more detail:os...

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

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193 views

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python - Django and read-only database connections

Assume a Django application which is supposed to use two MySQL databases: default - for storing data represented ... to the support database? 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 - Request for example: Recurrent neural network for predicting next value in a sequence

Can anyone give me a practicale example of a recurrent neural network in (pybrain) python in order to predict ... has some in depth explanation. 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 - Jupyter (IPython) notebook: Convert an HTML notebook to ipynb

I have converted a Jupyter/IPython notebook to HTML format and subsequently lost the original ipynb file. Is there ... the converted HTML 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 - Get date and time when photo was taken from EXIF data using PIL

I can get the EXIF data from an image using PIL, but how can I get the date and time that the photo was taken? See Question&Answers more detail:os...

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

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293 views

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python - Is there a numpy/scipy dot product, calculating only the diagonal entries of the result?

Imagine having 2 numpy arrays: > A, A.shape = (n,p) > B, B.shape = (p,p) Typically p is a ... allocating the intermediate (n x n) array? 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 - Cython compiled C extension: ImportError: dynamic module does not define init function

I have just compiled part of my C library as an extension using Cython, as a "proof of concept". I managed to hack ... 2.6.5 on Ubuntu 10.0.4 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 create a neural network for regression?

I am trying to use Keras to make a neural network. The data I am using is https://archive.ics.uci. ... accuracy increases? 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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304 views

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python - Numpy: Joining structured arrays?

Input I have many numpy structured arrays in a list like this example: import numpy a1 = numpy.array([(1, ... : result = array return result See Question&Answers more detail:os...

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

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518 views

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python - PyCharm: Configuring multi-hop remote Interpreters via SSH

To connect to the computer at my office I need to run ssh twice. First to connect to the host-1 and then ... data files on the host from local? See Question&Answers more detail:os...

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

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740 views

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python - Numpy quirk: Apply function to all pairs of two 1D arrays, to get one 2D array

Let's say I have 2 one-dimensional (1D) numpy arrays, a and b, with lengths n1 and n2 respectively. I ... this in numpy. 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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406 views

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python - POS tagging in German

I am using NLTK to extract nouns from a text-string starting with the following command: tagged_text = nltk.pos_tag( ... which is great so far.) See Question&Answers more detail:os...

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

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558 views

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python - Generating Ngrams (Unigrams,Bigrams etc) from a large corpus of .txt files and their Frequency

I need to write a program in NLTK that breaks a corpus (a large collection of txt files) into unigrams, ... help what should be done next? See Question&Answers more detail:os...

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

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222 views

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python - How to extract specific content in a pandas dataframe with a regex?

Consider the following pandas dataframe: In [114]: df['movie_title'].head() ? Out[114]: 0 Toy Story (1995 ... . Name: movie_title, dtype: object See Question&Answers more detail:os...

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

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409 views

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python - Spark 1.4 increase maxResultSize memory

I am using Spark 1.4 for my research and struggling with the memory settings. My machine has 16GB of memory ... . Any help is much 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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329 views

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python - urllib.urlencode doesn't like unicode values: how about this workaround?

If I have an object like: d = {'a':1, 'en': 'hello'} ...then I can pass it to urllib.urlencode, no ... ) # not so sure about this... 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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442 views

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python - Scraping a JSON response with Scrapy

How do you use Scrapy to scrape web requests that return JSON? For example, the JSON would look like this: { " ... the above) and save to csv. See Question&Answers more detail:os...

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

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490 views

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python - How to inspect and cancel Celery tasks by task name

I'm using Celery (3.0.15) with Redis as a broker. Is there a straightforward way to query the number of ... and don't see a solution there. See Question&Answers more detail:os...

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

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320 views

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python - nosetests is capturing the output of my print statements. How to circumvent this?

When I type $ nosetests -v mytest.py all my print outputs are captured when all tests pass. I want to see ... a better way. Enlighten me please. See Question&Answers more detail:os...

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

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285 views

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python - Map of all points below a certain time of travel?

My question is very simple and can be understood in one line: Is there a way, tool, etc. using Google Maps ... faster), and colors around roads. See Question&Answers more detail:os...

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

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604 views

1 answer

python - How to do a conditional count after groupby on a Pandas Dataframe?

I have the following dataframe: key1 key2 0 a one 1 a two 2 b one 3 b two 4 a one 5 c two Now, I want ... t get any further. How can I 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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552 views

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python - What are the correct usage/parameter values for HoughCircles in OpenCV for Iris detection?

I've been reading about the subject but cannot get the idea in "plain English" about the usage and parameters ... .h_next() return (frame) See Question&Answers more detail:os...

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

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569 views

1 answer

python - tqdm printing to newline

I'm working on a small command-line game in python where I am showing a progress bar using the tqdm module. ... the transfer, type 'restart'") See Question&Answers more detail:os...

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

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