Recent questions tagged Python

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python - Psycopg2 Insert Into Table with Placeholders

This might be a rather silly question but what am I doing wrong here? It creates the table but the INSERT INTO ... on this one? Thanks a bunch! 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 - Python3.6 ImportError: cannot import name 'main' Linux RHEL6

My ultimate goal is to download and install awscli http://docs.aws.amazon.com/cli/latest/userguide/awscli-install-linux ... -28.8.0.dist-info 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 - Import netCDF file to Pandas dataframe

Merry Christmas! I am still very new to Python and Pandas, so any help is appreciated. I am trying to read in a ... on the best 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 - How to convert defaultdict of defaultdicts [of defaultdicts] to dict of dicts [of dicts]?

Using this answer, I created a defaultdict of defaultdicts. Now, I'd like to turn that deeply nested dict object ... on the nested dict(s). 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 - Combining hdf5 files

I have a number of hdf5 files, each of which have a single dataset. The datasets are too large to hold in RAM ... file. I am using python/h5py. See Question&Answers more detail:os...

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

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471 views

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python - How to use the a k-fold cross validation in scikit with naive bayes classifier and NLTK

I have a small corpus and I want to calculate the accuracy of naive Bayes classifier using 10-fold cross validation, how can do 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 - Is divmod() faster than using the % and // operators?

I remember from assembly that integer division instructions yield both the quotient and remainder. So, in python will the built- ... / d, n % d) See Question&Answers more detail:os...

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

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509 views

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python - How can I serve NPM packages using Flask?

I have a small Flask app which currently sources jQuery and highlight.js from external servers. I'd like to ... to be compatible with that. 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

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python - Install pycairo in virtualenv

I've tried to install pycairo in a virtualenv to use in a Django project. I've ran the pip install pycairo==1. ... I can do). 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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python matplotlib dash-dot-dot - how to?

I am using python and matplotlib to generate graphical output. Is there a simple way to generate a dash-dot-dot ... . Did I overlook an option? See Question&Answers more detail:os...

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

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227 views

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python - Better way to shuffle two related lists

Is there better ways to randomly shuffle two related lists without breaking their correspondence in the other list? ... additional list as well. 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 - Partially transparent scatter plot, but with a solid color bar

In Python, with Matplotlib, how to simply do a scatter plot with transparency (alpha < 1), but with a color ... but this did not do anything See Question&Answers more detail:os...

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

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457 views

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python - How to start a Celery worker from a script/module __main__?

I've define a Celery app in a module, and now I want to start the worker from the same module in ... it log information about its configuration? See Question&Answers more detail:os...

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

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474 views

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python - Countdown Clock: 01:05

How can I create a countdown clock in Python that looks like 00:00 (min & sec) which is on a line of its ... believe that it has its own twist. See Question&Answers more detail:os...

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

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283 views

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python - Invalidate an old session in Flask

How do I create a new clean session and invalidate the current one in Flask? Do I use make_null_session() or open_session()? See Question&Answers more detail:os...

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

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327 views

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python - Prompt on exit in PyQt application

Is there any way to promt user to exit the gui-program written in Python? Something like "Are you sure you want ... program?" I'm using PyQt. See Question&Answers more detail:os...

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

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337 views

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python - Virtualenv on Ubuntu with no site-packages

I've been using virtualenv lately while developing in python. I like the idea of a segregated development ... -no-site-packages option? See Question&Answers more detail:os...

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

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412 views

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python - Overlay an image segmentation with numpy and matplotlib

I am trying to overlay two images. The first one is a 512x512 NumPy array (from a CT image). The second one is ... and I am quite new to 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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493 views

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python typing signature (typing.Callable) for function with kwargs

I heavily use python typing support from python 3. Recently I was trying to pass a function as an argument and I do not ... return fn(a=a, b=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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292 views

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python - How to filter model results for multiple values for a many to many field in django

I have the following Model: class Group(models.Model): member = models.ManyToManyField(Player, through='GroupMember') ... this type of query. 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

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python - Break on exception in pydev

Is it possible to get the pydev debugger to break on exception? See Question&Answers more detail:os...

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

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528 views

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python - Why does pip freeze list "pkg-resources==0.0.0"?

On Ubuntu 16.04 with virtualenv 15.0.1 and Python 3.5.2 (both installed with apt) when I create and activate new ... 14.04 (with Python 3.4). See Question&Answers more detail:os...

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

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475 views

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python - How do I tell PyLint "it's a variable, not a constant" to stop message C0103?

I have a module-level variable in my Python 2.6 program named "_log", which PyLint complains about: ... module-level variables as constants? See Question&Answers more detail:os...

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

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231 views

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python - Understanding accumulated gradients in PyTorch

I am trying to comprehend inner workings of the gradient accumulation in PyTorch. My question is somewhat related ... 2 backfire somehow)? See Question&Answers more detail:os...

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

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248 views

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python - How to reverse sklearn.OneHotEncoder transform to recover original data?

I encoded my categorical data using sklearn.OneHotEncoder and fed them to a random forest classifier. Everything ... to its original state? See Question&Answers more detail:os...

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

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271 views

1 answer

python - How to create a dynamic array

As I understand, the list type in Python is a dynamic pointer array, which will increase it's capacity when ... list is bigger than 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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352 views

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python - Factor Loadings using sklearn

I want the correlations between individual variables and principal components in python. I am using PCA in sklearn. I ... this can be achieved. See Question&Answers more detail:os...

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

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217 views

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python - pandas - Merging on string columns not working (bug?)

I'm trying to do a simple merge between two dataframes. These come from two different SQL tables, where the ... would be appreciated as well.) See Question&Answers more detail:os...

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

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