Recent questions tagged Python

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When using the following code my application stalls after a couple of seconds. And by stalls I mean hangs. I get a ... (1) Thanks for any 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 - Using Sqlite3 on Heroku Cedar stack

Is there a way to use Sqlite3 with Django on Heroku? 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 conditional cumulative sum

Consider my dataframe df data data_binary sum_data 2 1 1 5 0 0 1 1 1 4 1 2 3 1 3 10 0 0 7 0 0 3 1 1 I ... 0, 0, 5]) Which is not 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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python - Matplotlib and Networkx - drawing a self loop node

I have this function and I want to draw a self loop. How can I do that? The edge exists but I think it's just ... ') plt.axis('off') plt.show() 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 - Plotly/Dash display real time data in smooth animation

We are trying to produce a real-time dashboard in plotly-dash that displays live data as it is produced. We ... data being appended to a graph. 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 - Numpy: Sorting a multidimensional array by a multidimensional array

Forgive me if this is redundant or super basic. I'm coming to Python/Numpy from R and having a hard time flipping ... the index ... element n? 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 function object from a string

Question: Is there a way to make a function object in python using strings? Info: I'm working on a project ... ve answered the question at hand) 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 - Explain why numpy should not be imported from source directory

Disclaimer of research: I have examined the following other StackOverflow questions: How to import numpy in python ... more because of 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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python - When is plt.show() required to show a plot and when is it not?

Since the following code will show a plot without plt.show(), what is the point of plt.show()? Please tell me when plt ... plt.plot([1, 2, 3]) 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 - Tensorflow: How to pass output from previous time-step as input to next timestep

It is a duplicate of this question How can I feed last output y(t-1) as input for generating y(t) ... built over tensorflow. Any suggestions? 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 - Why are lil_matrix and dok_matrix so slow compared to common dict of dicts?

I want to iteratively build sparse matrices, and noticed that there are two suitable options for this according to ... a common dict of dicts? 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 - list of columns in common in two pandas dataframes

I'm considering merge operations on dataframes each with a large number of columns. Don't want the result to have ... of the columns in common? 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 ModelChoiceField instances in the template

I have a ModelForm that contains a ModelChoiceField using the RadioSelect widget. class MyAForm(forms.ModelForm): ... use within a template? 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 - Encountering " WARN ProcfsMetricsGetter: Exception when trying to compute pagesize" error when running Spark

I installed spark and when trying to run it, I am getting the error: WARN ProcfsMetricsGetter: Exception when ... someone help me with 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 change the dtype of certain columns of a numpy recarray?

Suppose I have a recarray such as the following: import numpy as np # example data from @unutbu's answer recs = ... and them back to a recarray? 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 install pytorch in windows?

I am trying to install pytorch on windows and there is one which is available for it but shows an error. conda ... -c peterjc123 pytorch=0.1.12 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 run raw mongodb commands from pymongo

In a mongo command line I can run db.my_collection.stats() I need to get my collections stats from Python ... commands to mongo through Python? 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 - Passing arguments to fsolve

I'm solving a nonlinear equation with many constants. I created a function for solving like: def terminalV(Vt, ... function called by fsolve()? See Question&Answers more detail:os...

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

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299 views

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python - How do I select a window from a numpy array with periodic boundary conditions?

Suppose I make a 2d array like this: >>> A=np.arange(16).reshape((4,4)) >>> A array([[ 0, 1, 2, 3], ... an empty array for i=0, j=0 for example. 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 can I use pyparsing to parse nested expressions that have multiple opener/closer types?

I'd like to use pyparsing to parse an expression of the form: expr = '(gimme [some {nested [lists]}])', and ... brackets, but I don't know why. See Question&Answers more detail:os...

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

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384 views

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python - Encoding gives "'ascii' codec can't encode character … ordinal not in range(128)"

I am working through the Django RSS reader project here. The RSS feed will read something like "OKLAHOMA CITY (AP) ... " where the em dash was See Question&Answers more detail:os...

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

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197 views

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python - Combining two JSON objects in to one

I have two JSON objects. One is python array which is converted using json,dumps() and other contains records from ... } How can i do this? 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 - REGEX - Differences between `^`, `$` and `A`, ``

As I know, re proposes the following boundary matches. ^ matches at the beginning of a line. $ matches at the end of ... ^, $ and A, ? 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 2.7 - Running PySpark on and IDE like Spyder?

I could run PySpark from the terminal line and everything works fine. ~/spark-1.0.0-bin-hadoop1/bin$ ./pyspark ... wanted to work in the IDE. See Question&Answers more detail:os...

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

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333 views

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python - How to get last Friday?

The code below should return last Friday, 16:00:00. But it returns Friday of previous week. How to fix that? now ... , otherwise - Oct 5, 2012. See Question&Answers more detail:os...

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

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762 views

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python - matplotlib very slow. Is it normal?

I am creating a couple of pdf plots with matplotlib which is composed of 400 subplots. Each one has only 5 ... plot created.' Final Picture: See Question&Answers more detail:os...

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

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148 views

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python - Write DataFrame to mysql table using pySpark

I am attempting to insert records into a MySql table. The table contains id and name as columns. I am doing ... into a MySql table from pySpark See Question&Answers more detail:os...

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

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281 views

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python - setuptools and pip: choice of minimal and complete install

We've made a library which depends on other libraries. But there are necessary (e.g. for server ... requires, extras_require = recommended ) See Question&Answers more detail:os...

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

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