Recent questions tagged Python

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python - How to import a globally installed package to virtualenv folder

So I have a virtualenv folder called venv for my python project. I can run: venv/bin/pip install -r ... installed through apt to venv folder? 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 retry urllib2.request when fails?

When urllib2.request reaches timeout, a urllib2.URLError exception is raised. What is the pythonic way to retry establishing a connection? 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 - Is there a speed difference between WSGI and FCGI?

From the web I've gleaned that WSGI is a CGI for python web development/frameworks. FCGI seems to be a more ... the languages python and C/++. 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 do I get multiple values from checkboxes in Django

I want to get values of a multiple select check box using request.POST['xzy'] as a list. Here is my ... . Need help desperately. 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 - Using Sql Server with Django in production

Has anybody got recent experience with deploying a Django application with an SQL Server database back end? Our ... What are your experiences? 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 - Connecting postgresql with sqlalchemy

I know this might be really a simple question but I don't know the solution. What is happening ... correct connection string for postgresql? 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 - DRY way to add created/modified by and time

Having something like created_by created_date modified_by modified_date Would be a very common pattern for a lot of ... centralise logic 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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python - setup.py and adding file to /bin/

I can't figure out how to make setup.py add a scrip to the the user's /bin or /usr/bin or whatever ... can call myscript.py from any directory. 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 do product of matrices in PyTorch

In numpy I can do a simple matrix multiplication like this: a = numpy.arange(2*3).reshape(3,2) b ... multiplication can be conducted in PyTorch? 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 - Does Gunicorn run on Windows

I have looked around for a while, and I was surprised not finding any information whether Gunicorn runs on ... some documentation about it? 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 JSON only get keys in first level

I have a very long and complicated json object but I only want to get the items/keys in the first level! Example: ... all keys (also 12 and 25) 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 - save a pandas.Series histogram plot to file

In ipython Notebook, first create a pandas Series object, then by calling the instance method .hist(), the browser ... needed in the script). 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 does IPython's magic %paste work?

I want to copy already indented Python code / whole functions and classes into IPython. Everytime I try the ... and %cpaste magic functions. 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 when checking if variable is None or numpy.array

I'd like to check if variable is None or numpy.array. I've implemented check_a function to do this. def check_a(a): ... Use a.any() or a.all() 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 - Mocking a function to raise an Exception to test an except block

I have a function (foo) which calls another function (bar). If invoking bar() raises an HttpError, I want ... testing logic in my except block? 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 - String formatting named parameters?

I know it's a really simple question, but I have no idea how to google it. how can I do print '<a href=" ... params, but that's not the point :) See Question&Answers more detail:os...

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

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93 views

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python - How to profile my code?

I want to know how to profile my code. I have gone through the docs, but as there were no examples given ... way of speeding up, please suggest. 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 deal with batches with variable-length sequences in TensorFlow?

I was trying to use an RNN (specifically, LSTM) for sequence prediction. However, I ran into an issue with ... hacks, but nothing seems working. See Question&Answers more detail:os...

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

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108 views

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python - Difference between these array shapes in numpy

What is the difference between 2 arrays whose shapes are- (442,1) and (442,) ? Printing both of these ... ) Can someone explain the difference? 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 - Is there "Edit and Continue" in PyCharm? Reload code into running program like in Eclipse / PyDev?

Hi all Python developers! In Eclipse with PyDev it is possible to edit a Python file while debugging. On save, ... there was no reload done. See Question&Answers more detail:os...

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

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477 views

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python - How to get ipywidgets working in Jupyter Lab?

In Jupyter Notebook, ipywidgets work fine, however they seem to not work in Jupyter Lab (which is supposedly ... the jupyter lab notebook: See Question&Answers more detail:os...

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

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326 views

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python - Convert opencv image format to PIL image format?

I want to convert an image loaded TestPicture = cv2.imread("flowers.jpg") I would like to run a PIL filter like ... (im_pil) Out[5]: 'TUM' 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 - Multiple inheritance in python3 with different signatures

I have three classes: A, B and C. C inherits from A and B (in this order). The constructor signatures of ... I pass to the parent classes. See Question&Answers more detail:os...

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

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397 views

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python - How do you watch a variable in pdb

I'm debugging a python script, and I want to watch a variable for a change (much like you can watch a memory ... 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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221 views

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python - pymongo.errors.CursorNotFound: cursor id '...' not valid at server

I am trying to fetch some ids that exist in a mongo database with the following code: client = ... the database ids using batch_size? See Question&Answers more detail:os...

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

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247 views

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python - keras: how to save the training history attribute of the history object

In Keras, we can return the output of model.fit to a history as follows: history = model.fit(X_train, y_train, ... acc or loss against epochs)? See Question&Answers more detail:os...

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

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539 views

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python - How to GroupBy a Dataframe in Pandas and keep Columns

given a dataframe that logs uses of some books like this: Name Type ID Book1 ebook 1 Book2 paper 2 Book3 paper ... can this be done? 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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451 views

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python - Keyboard shortcut to clear cell output in Jupyter notebook

Does anyone know what is the keyboard shortcut to clear (not toggle) the cell output in Jupyter Notebook? See Question&Answers more detail:os...

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

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