Recent questions tagged Python

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python - Difference between entry_points/console_scripts and scripts in setup.py?

There are basically two ways to install Python console scripts to my path by setup.py: setup( ... entry_points = ... cool docs on the topic. 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 handle both `with open(...)` and `sys.stdout` nicely?

Often I need to output data either to file or, if file is not specified, to stdout. I use the following ... wouldn't require more than 5 lines 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 - Shuffle two list at once with same order

I'm using the nltk library's movie_reviews corpus which contains a large number of documents. My task is get ... same order) # or 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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python - Determining Whether a Directory is Writeable

What would be the best way in Python to determine whether a directory is writeable for the user executing the ... under a *nix environment. 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 - Creating a zero-filled pandas data frame

What is the best way to create a zero-filled pandas data frame of a given size? I have used: zero_data = np. ... there a better way 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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159 views

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python - Read the current text color in a xterm

I'm writing various utilities, and I'm really liking colorized text. Nothing fancy, just using escape sequences. I' ... .3 Thanks for the 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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python - Convert UUID 32-character hex string into a "YouTube-style" short id and back

I'm assigning all my MongoDB documents a GUID using uuid.uuid1(). I want a way I can derive an 11 character, ... or formula that can 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 - Pandas df.iterrows() parallelization

I would like to parallelize the following code: for row in df.iterrows(): idx = row[0] k = row[1] ... do parallelization with pandas. Any 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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python - Calculating the percentage of variance measure for k-means?

On the Wikipedia page, an elbow method is described for determining the number of clusters in k-means. The built-in method ... 9, 10, 11, 12]) 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 import from config file in Flask?

I have followed the layout of my Flask project from http://blog.miguelgrinberg.com/post/the-flask-mega-tutorial- ... ') from app import views See Question&Answers more detail:os...

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

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421 views

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python pandas, DF.groupby().agg(), column reference in agg()

On a concrete problem, say I have a DataFrame DF word tag count 0 a S 30 1 the S 20 2 a T 60 3 an T ... the same as .aggregate() ? 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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python 3.x - Serialize in JSON a base64 encoded data

I'm writing a script to automate data generation for a demo and I need to serialize in a JSON some data. ... serializating. What am I missing? 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 - How do I change the default virtualenv prompt?

How do you change the default Virtualenvwrapper prompt? By default, working on a particular virtual environment ... default command prompt. 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 2 instead of python 3 as the (temporary) default python?

on my computer ~$ python -V Python 3.2.1 but I get into problems when I run some python programs. my guess ... python and I am using arch linux. 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 - Adding Custom Django Model Validation

I have a Django model with a start and end date range. I want to enforce validation so that no two ... contents, or relations between fields. 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 - How are generators and coroutines implemented in CPython?

I've read that in CPython, the interpreter stack (the list of Python functions called to reach this point) ... yield from that topmost frame? See Question&Answers more detail:os...

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

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122 views

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python - How to export virtualenv?

I'm new to virtualenv but I'm writting django app and finally I will have to deploy it somehow. So lets ... this can be done? Please 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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1.4k views

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python - Plot mean and standard deviation

I have several values of a function at different x points. I want to plot the mean and std in python, like the ... do that. Does anyone know 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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122 views

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python - How to open and convert sqlite database to pandas dataframe

I have downloaded some datas as a sqlite database (data.db) and I want to open this database in python ... sqlite database to pandas 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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278 views

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python - How does Lru_cache (from functools) Work?

Especially when using recursive code there are massive improvements with lru_cache. I do understand that a cache ... users on StackOverflow. See Question&Answers more detail:os...

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

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730 views

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python - How to enable a virtualenv in a systemd service unit?

I want to "activate" a virtualenv in a systemd service file. I would like avoid to have a shell process ... enties in sys.path are missing. See Question&Answers more detail:os...

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

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211 views

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python - How to run cloned Django project?

I am a junior software engineer and am quite new to Django. I built this app and am working on a README to ... the server to run? 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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154 views

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python - Access Django models with scrapy: defining path to Django project

I'm very new to Python and Django. I'm currently exploring using Scrapy to scrape sites and save data to the Django ... ? (if that is the issue) See Question&Answers more detail:os...

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

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286 views

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python - Difference between np.int, np.int_, int, and np.int_t in cython?

I am a bit struggled with so many int data types in cython. np.int, np.int_, np.int_t, int I guess ... the performance of compiled cython code? See Question&Answers more detail:os...

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

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183 views

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python - Pandas: Knowing when an operation affects the original dataframe

I love pandas and have been using it for years and feel pretty confident I have a good handle on how to ... used to create the new 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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159 views

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python - How to add if condition in a TensorFlow graph?

Let's say I have following code: x = tf.placeholder("float32", shape=[None, ins_size**2*3], ... into the TensorFlow calculation 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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356 views

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python - how to use python2.7 pip instead of default pip

I just installed python 2.7 and also pip to the 2.7 site package. When I get the version with: pip -V ... /usr/local/lib/python2.7/site-packages See Question&Answers more detail:os...

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

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496 views

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python - ipython notebook --pylab inline: zooming of a plot

Is it possible to zoom into a plot if inline is activated? Especially regarding to 3d-plots rotating and zooming is a necessary 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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