Recent questions tagged Python

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python - Can I somehow share an asynchronous queue with a subprocess?

I would like to use a queue for passing data from a parent to a child process which is launched via ... not pursue this any further. 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 run celery as a daemon in production?

i created a celeryd file in /etc/defaults/ from the code here: https://github.com/celery/celery/blob/3.0/ ... found. Where am I going wrong? 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 - Pythonic macro syntax

I've been working on an alternative compiler front-end for Python where all syntax is parsed via macros. I' ... ; generally used for operators. 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 merge results from target page to current page in scrapy?

Need example in scrapy on how to get a link from one page, then follow this link, get more info from the ... with some data from first page. 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 use csrf_token in Django RESTful API and React?

I have previous experience in Django. If add line {csrf_token} in Django templates then Django handles the ... end) like Django templates? See Question&Answers more detail:os...

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

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339 views

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python - Plotting only upper/lower triangle of a heatmap

In maptplotlib, one can create a heatmap representation of a correlation matrix using the imshow function. By ... 't find anything helpful 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 save an Excel worksheet as CSV

I want to write a Python script that reads in an Excel spreadsheet and saves some of its worksheets as CSV files ... to do, even under Windows. 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 - What cool hacks can be done using sys.settrace?

I love being able to modify the arguments the get sent to a function, using settrace, like : import sys def ... stuff can you do using settrace? 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 - psycopg2 leaking memory after large query

I'm running a large query in a python script against my postgres database using psycopg2 (I upgraded to version 2. ... () import gc gc.collect() 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 is scikit-learn cross_val_predict accuracy score calculated?

Does the cross_val_predict (see doc, v0.18) with k-fold method as shown in the code below calculate accuracy ... (labels, ypred) print accuracy See Question&Answers more detail:os...

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

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232 views

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python - Debug Jinja2 in Google App Engine

When I'm running Jinja2 in Google App Engine, I get useless debugging information. I gather this is because of ... Thank you for reading. Brian 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 - Manager dict in Multiprocessing

Here is a simple multiprocessing code: from multiprocessing import Process, Manager manager = Manager() d = manager.dict( ... 4]} as the output? 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 - pandas DataFrame concat / update ("upsert")?

I am looking for an elegant way to append all the rows from one DataFrame to another DataFrame (both ... for a more straightforward solution? See Question&Answers more detail:os...

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

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202 views

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python 2.7 - PyInstaller not working on simple HelloWorld Program

So I am running on 64-bit Windows 7, and I set up Pyinstaller with Pip and PyWin32. I have python 2.7. I ... doing wrong and how do I fix 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 3.x - GridSearchCV - XGBoost - Early Stopping

i am trying to do hyperparemeter search with using scikit-learn's GridSearchCV on XGBoost. During gridsearch i ... ={'early_stopping_rounds':42} See Question&Answers more detail:os...

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

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624 views

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python - Send asyncio tasks to loop running in other thread

How can I asynchronously insert tasks to run in an asyncio event loop running in another thread? My motivation is to ... .async(g(), loop=loop) 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 - TensorFlow - Read all examples from a TFRecords at once?

How do you read all examples from a TFRecords at once? I've been using tf.parse_single_example to read out ... the records? Thank you much! 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 - Selecting columns by list (and columns are subset of list)

I'm selecting several columns of a dataframe, by a list of the column names. This works fine if all elements of ... lst] # error: not in index See Question&Answers more detail:os...

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

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189 views

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python - How do pandas Rolling objects work?

Edit: I condensed this question given that it was probably too involved to begin with. The meat of the question ... layout of a .rolling 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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213 views

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python - Where do you need to use lit() in Pyspark SQL?

I'm trying to make sense of where you need to use a lit value, which is defined as a literal column in the ... use lit and possibly col 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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263 views

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python - How can I create custom page for django admin?

I want to create custom page for admin panel without model. For first i copy index.html to project folder: mysite/ ... .". What I do wrong? See Question&Answers more detail:os...

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

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524 views

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python - Output different precision by column with pandas.DataFrame.to_csv()?

Question Is it possible to specify a float precision specifically for each column to be printed by the Python pandas ... -28.508287, 0.000000 See Question&Answers more detail:os...

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

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557 views

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python - Localhost Endpoint to DynamoDB Local with Boto3

Although Amazon provides documentation regarding how to connect to dynamoDB local with Java, PHP and .Net, there ... to support this feature? See Question&Answers more detail:os...

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

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254 views

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python - Exporting Data from google colab to local machine

How to export data frames which are created in google colab to your local machine? I have cleaned a data set ... and not my local machine. 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 - conda command will prompt error: "Bad Interpreter: No such file or directory"

I'm using arch linux and I've installed Anaconda as per the instruction on the Anaconda site. When I'm ... remove Anaconda and reinstalling 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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174 views

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python - Using flask inside class

I have application with many threads. One of them is flask, which is used to implement (axillary) API. It used ... can I use Flask inside class? See Question&Answers more detail:os...

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

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416 views

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python - Combine (join) networkx Graphs

Say I have two networkx graphs, G and H: G=nx.Graph() fromnodes=[0,1,1,1,1,1,2] tonodes=[ ... of Combine two weighted graphs in NetworkX See Question&Answers more detail:os...

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

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498 views

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python - Is there an R equivalent of the pythonic "if __name__ == "__main__": main()"?

The objective is to have two simple ways to source some code, say func.R, containing a function. Calling ... the function. Any idea? See Question&Answers more detail:os...

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

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