Recent questions tagged Python

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python - Django: How to automatically change a field's value at the time mentioned in the same object?

I am working on a django project for racing event in which a table in the database has three fields. 1) ... ? How to schedule these activities? 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 parse a C header file?

Does anyone know a spiffy way to use C header files in Python? For example I have a C program that includes ... it) with a Python 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 - Downsampling wav audio file

I have to downsample a wav file from 44100Hz to 16000Hz without using any external Python libraries, so preferably ... length of the audio? 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 - Test a string if it's Unicode, which UTF standard is and get its length in bytes?

I need to test if a string is Unicode, and then if it whether it's UTF-8. After that, get the string' ... edit: pprint does that pretty 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 - How to use a WTForms FieldList of FormFields?

I'm building a website using Flask in which I use WTForms. In a Form I now want to use a FieldList of ... wrong here? All tips are welcome! 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 - gunicorn.errors.HaltServer: <HaltServer 'Worker failed to boot.' 3>

I've installed gunicorn inside my virtualenv. From this directory: manage.py /onbytes/wsgi.py I run the ... module named django.core.wsgi 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 - Why is matplotlib plotting my circles as ovals?

Is there a way to get matplotlib to plot a perfect circle? They look more like ovals. 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 - Efficiently replace values from a column to another column Pandas DataFrame

I have a Pandas DataFrame like this: col1 col2 col3 1 0.2 0.3 0.3 2 0.2 0.3 0.3 3 0 0. ... other function instead of the pd.replace function? 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 - asyncio web scraping 101: fetching multiple urls with aiohttp

In earlier question, one of authors of aiohttp kindly suggested way to fetch multiple urls with aiohttp using ... is a useful response 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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python - Issue feeding a list into feed_dict in TensorFlow

I'm trying to pass a list into feed_dict, however I'm having trouble doing so. Say I have: inputs ... python.framework.ops.Tensor at 0x107594a10 See Question&Answers more detail:os...

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

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118 views

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python - Django App Dependency Cycle

I am in the middle of developing a Django application, which has quite complicated models (it models a university ... comment on this case? 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 - Driving a Windows GUI program from a script

I have to use a Windows simulation package to perform a repetitive task with slightly different options each time ... anything else that works. 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 rearrange Pandas column sequence?

>>> df =DataFrame({'a':[1,2,3,4],'b':[2,4,6,8]}) >>> df['x']=df.a + df.b >>> df['y ... (df,'x',0) and set_column_sequence(df,'y',1) ? 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 - Tensorflow Confusion Matrix in TensorBoard

I want to have a visual of confusion matrix in tensorboard. To do this, I am modifying Evaluation example ... multi batch evaluation process? See Question&Answers more detail:os...

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

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460 views

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python - Why django urls end with a slash?

Django official documentation and other tutorials on the web always use a trailing slash at the end of url. ... ) is accepting parameters?? See Question&Answers more detail:os...

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

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106 views

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python - Is it possible to "transfer" a session between selenium.webdriver and requests.session

In theory, if I copy all of the cookies from selenium's webdriver object to requests.Session object, would ... on my interaction in selenium) 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 to concatenate multiple pandas.DataFrames without running into MemoryError

I have three DataFrames that I'm trying to concatenate. concat_df = pd.concat([df1, df2, df3]) This results ... can't concatenate that data. 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 - Finding a list of all double-underscore variables?

Related: What is the common header format of Python files? Where can I find a list of all double- ... bunch of double-underscore variables. See Question&Answers more detail:os...

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

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224 views

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python - Can SQLAlchemy be configured to be non-blocking?

I'm under the impression that database calls through SQLAlchemy will block and aren't suitable for use in anything ... it to be non-blocking? See Question&Answers more detail:os...

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

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171 views

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python - What's exactly happening in infinite nested lists?

It's possible to create an infinite nested list in Python. That's clear and, although not popular and ... programming can be fun sometimes. See Question&Answers more detail:os...

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

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112 views

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python - What's the working directory when using IDLE?

So, I'm learning Python and would like to create a simple script to download a file from the internet and ... directory or how to change 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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208 views

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python - Accessing POST Data from WSGI

I can't seem to figure out how to access POST data using WSGI. I tried the example on the wsgi.org ... get it into a fieldstorage 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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python - How do I split a string into a list?

If I have this string: 2+24*48/32 what is the most efficient approach for creating this list: ['2', '+', '24', '*', '48', '/', '32'] See Question&Answers more detail:os...

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

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262 views

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python - What are the advantages or difference in “assert False” and “self.assertFalse”

I am writing tests and I have heard some people saying to use self.assertFalse rather than assert False. Why is ... any advantages to be had? See Question&Answers more detail:os...

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

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172 views

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python - How to right-align numeric data?

I have some data that I am displaying in 3 column format, of the form: key: value key: <tab> key: value <tab> ... : " + str(tripleArray[i][1])) See Question&Answers more detail:os...

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

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699 views

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python - How to share secondary y-axis between subplots in matplotlib

If you have multiple subplots containing a secondary y-axis (created using twinx), how can you share these secondary y ... version is 1.2.0rc2. See Question&Answers more detail:os...

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

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405 views

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python - Add edge-weights to plot output in networkx

I am doing some graph theory in python using the networkx package. I would like to add the weights of the ... which they refer in the graph. See Question&Answers more detail:os...

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

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310 views

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python - Plotting a histogram from pre-counted data in Matplotlib

I'd like to use Matplotlib to plot a histogram over data that's been pre-counted. For example, say I ... per-item counts into binned counts? See Question&Answers more detail:os...

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

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