Recent questions tagged Python

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python - Converting date between DD/MM/YYYY and YYYY-MM-DD?

Using a Python script, I need to read a CVS file where dates are formated as DD/MM/YYYY, and convert them to YYYY ... how to do it. 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 - SQLAlchemy, clear database content but don't drop the schema

I'm developing a Pylons app which is based on exisitng database, so I'm using reflection. I have an SQL file ... be used also for the tests. See Question&Answers more detail:os...

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

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345 views

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python - Find all columns of dataframe in Pandas whose type is float, or a particular type?

I have a dataframe, df, that has some columns of type float64, while the others are of object. Due to the mixed ... position 0" Thanks a lot! Yu 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 - unable to create autoincrementing primary key with flask-sqlalchemy

I want my model's primary key to be an autoincrementing integer. Here is how my model looks like class Region( ... is wrong with the code above? See Question&Answers more detail:os...

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

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198 views

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python - How to approach a number guessing game (with a twist) algorithm?

Update(July 2020): Question is 9 years old but still one that I'm deeply interested in. In the time since, ... , 'pears': 13} print 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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python - Pip build option to use multicore

I found that pip only use single core when it compiles packages. Since some python packages takes some time to ... achieve same thing for pip? 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 - Delete a subplot

I'm trying to figure out a way of deleting (dynamically) subplots in matplotlib. I see they have a remove ... plt.draw() plt.tight_layout() See Question&Answers more detail:os...

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

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256 views

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python - pandas - change df.index from float64 to unicode or string

I want to change a dataframes' index (rows) from float64 to string or unicode. I thought this would work ... float64 or object is not supported See Question&Answers more detail:os...

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

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318 views

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python - Purpose of else and finally in exception handling

Are the else and finally sections of exception handling redundant? For example, is there any difference between ... just to enhance readability? See Question&Answers more detail:os...

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

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242 views

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python - How to Copy from IPython session without terminal prompts

Frequently, my workflow involves data cleaning/munging in an IPython shell. This has become particularly wonderful ... functionality in IPython? See Question&Answers more detail:os...

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

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280 views

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python - "WARNING: Value for scheme.data does not match" when I try to update pip or install packages

I have a M1 Mac and I just noticed that when I try to upgrade pip or install any packages I get a series ... None user@mac01 ~ $ Please advise. See Question&Answers more detail:os...

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

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350 views

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python - Printing test execution times and pinning down slow tests with py.test

I am running unit tests on a CI server using py.test. Tests use external resources fetched over network. ... problematic tests become easier? See Question&Answers more detail:os...

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

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344 views

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python - Recognize the characters of license plate

I try to recognize the characters of license plates using OCR, but my licence plate have worse quality. I'm trying to ... not know how to 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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917 views

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python - Split audio files using silence detection

I've more than 200 MP3 files and I need to split each one of them by using silence detection. I tried ... I tried FFmpeg but no success. See Question&Answers more detail:os...

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

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160 views

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python - Reading binary data into pandas

I have some binary data and I was wondering how I can load that into pandas. Can I somehow load it ... last 256 integers is one column. See Question&Answers more detail:os...

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

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558 views

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python - Constructing Django filter queries dynamically with args and kwargs

I'm constructing some Django filter queries dynamically, using this example: kwargs = { 'deleted_datetime__isnull': True ... up the | condition. See Question&Answers more detail:os...

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

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574 views

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python - Yapsy minimal example

Can anyone provide a minimal working example using the Yapsy plugin framework? See Question&Answers more detail:os...

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

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244 views

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python - A decorator that profiles a method call and logs the profiling result

I want to create a decorator that profiles a method and logs the result. How can this be 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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287 views

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python - How can I PUT/POST JSON data to a ListSerializer?

I'm reading about customizing multiple update here and I haven't figured out in what case the custom ... convention or some 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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241 views

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python - How to install older formula using Brew?

Using the case of installing Python 2.7.9 instead of the latest 2.7.10, previously I could simply use ... result as brew versions python does. See Question&Answers more detail:os...

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

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273 views

1 answer

python - Merging results from model.predict() with original pandas DataFrame?

I am trying to merge the results of a predict method back with the original data in a pandas.DataFrame object. ... .nan values in the dataframe. See Question&Answers more detail:os...

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

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377 views

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python - Maximum Likelihood Estimate pseudocode

I need to code a Maximum Likelihood Estimator to estimate the mean and variance of some toy data. I have a ... , when should I stop trying? See Question&Answers more detail:os...

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

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318 views

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python - how to explain the decision tree from scikit-learn

I have two problems with understanding the result of decision tree from scikit-learn. For example, this is one of ... the graph??? Many 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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290 views

1 answer

python - Django, save ModelForm

I have created a model Student which extends from the Django User and is a foreign key to another model while it has ... ', 'course', 'year'] See Question&Answers more detail:os...

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

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374 views

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python - Extract row with maximum value in a group pandas dataframe

A similar question is asked here: Python : Getting the Row which has the max value in groups using groupby However, I just ... 5 s3 f 6 6 >>> See Question&Answers more detail:os...

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

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467 views

1 answer

python - best place to clear cache when restarting django server

I want memcached to be flushed on every restart/reload of django server. I use cherrypy for production and ... Any other suggestions? 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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165 views

1 answer

python - sorting points to form a continuous line

I have a list of (x,y)-coordinates that represent a line skeleton. The list is obtained directly from a binary ... 't 'ordered' on the line: See Question&Answers more detail:os...

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

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449 views

1 answer

python - Graceful shutdown of asyncio coroutines

I'm currently having problems closing asyncio coroutines during the shutdown CTRL-C of an application. The following code ... 's for your help! See Question&Answers more detail:os...

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

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