Recent questions tagged PYTHON

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python - Connecting to an Oracle database using SQLAlchemy

I am able to successfully connect to a SQLite database and access a particular table using the set of commands ... exactly I am 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 - How can I set up Celery to call a custom initialization function before running my tasks?

I have a Django project and I'm trying to use Celery to submit tasks for background processing ( http://ask ... the Celery source code? 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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305 views

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python - Check if multiple variables have the same value

I have a set of three variables x, y, z and I want to check if they all share the same value. In my case, ... (If it matters, I use Python 3.) 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 get the current port number in Flask?

Using Flask, how can I get the current port number that flask is connected to? I want to start a server on a ... , I can try the next port. 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 - Difference between dictionary and OrderedDict

I am trying to get a sorted dictionary. But the order of the items between mydict and orddict doesn't seem to ... .values(): # print(value) See Question&Answers more detail:os...

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

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210 views

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python - How to properly write cross-references to external documentation with intersphinx?

I'm trying to add cross-references to external API into my documentation but I'm facing three different behaviors. I ... as in the numpy 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 - Return value while using cProfile

I'm trying to profile an instance method, so I've done something like: import cProfile class Test(): def ... I can combine them later.) 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 - numpy array of objects

I'm trying to implement a simulation for a lattice model (lattice boltzmann) in Python. Each site of the ... to a multidimensional array? 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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241 views

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python - Checking on a thread / remove from list

I have a thread which extends Thread. The code looks a little like this; class MyThread(Thread): def run(self): # Do ... ]) ?? will that work... 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 - Pipenv with Conda?

I'm using Anaconda for my virtualenvs in win 10. I'm using git-bash .I've been reading about pipenv recently ... to use the 2 packages together? See Question&Answers more detail:os...

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

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313 views

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python - Parse_dates in Pandas

The following code can't parse my date column into dates from csv file. data=pd.read_csv('c:/data.csv', ... do wrong? Please help! 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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456 views

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python - Difference between cross_val_score and cross_val_predict

I want to evaluate a regression model build with scikitlearn using cross-validation and getting confused, which of ... regarding CV in SKLearn? 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 - Flask request and application/json content type

I have a flask app with the following view: @menus.route('/', methods=["PUT", "POST"]) def new(): ... set the application content-type to json. See Question&Answers more detail:os...

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

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448 views

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python - Plot dynamically changing graph using matplotlib in Jupyter Notebook

I have a M x N 2D array: ith row represents that value of N points at time i. I want to ... graph with Python Update Lines in matplotlib 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 install SciPy on Apple Silicon (ARM / M1)

I have successfully installed python 3.9.1 with Numpy and Matplotlib on a new Mac mini with Apple Silicon. ... natively, not through Rosetta). 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 - Using plotly without online plotly account

Is it possible to use the plotly library to create charts in python without having an online plotly account? ... without an online account. 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 - Finding k closest numbers to a given number

Say I have a list [1,2,3,4,5,6,7]. I want to find the 3 closest numbers to, say, 6.5. Then ... there a pythonic way to achieve the above task? 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 - nightmare with relative imports, how does pep 366 work?

I have a "canonical file structure" like that (I'm giving sensible names to ease the reading): mainpack/ ... to the PYTHONPATH, nothing changes. See Question&Answers more detail:os...

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

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1.5k views

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python - Is it possible to show `print` output as LaTeX in jupyter notebook?

I was writing a very simple script to count ellipsoid area and volume and some other things. I was presenting ... that: Thanks for all replies. See Question&Answers more detail:os...

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

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424 views

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python - Replace empty strings with None/null values in DataFrame

I have a Spark 1.5.0 DataFrame with a mix of null and empty strings in the same column. I want to convert all empty ... 2| ## +----+----+ See Question&Answers more detail:os...

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

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303 views

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python - Inserting a row at a specific location in a 2d array in numpy?

I have a 2d array in numpy where I want to insert a new row. Following question Numpy - add row to array ... anyone please help in this regard. 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 - Resize rectangular image to square, keeping ratio and fill background with black

I'm trying to resize a batch of grayscale images that are 256 x N pixels (N varies, but is always ≤256). My ... cv2, PIL or numpy 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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225 views

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python - Save a list to a .txt file

Is there a function in python that allows us to save a list in a txt file and keep its format? If I have the ... copy those in to a txt file. See Question&Answers more detail:os...

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

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869 views

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python - cx_Oracle doesn't connect when using SID instead of service name on connection string

I have a connection string that looks like this con_str = "myuser/[email protected]:1521/ora1" Where ora1 ... it keep it that way. See Question&Answers more detail:os...

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

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300 views

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python - Adding a ManyToManyWidget to the reverse of a ManyToManyField in the Django Admin

Let's say I have a simple blog app in Django 1.4: class Post(models.Model): title = published_on = tags = ... there a Right 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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357 views

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python - Excluding a top-level directory from a setuptools package

I'm trying to put a Python project into a tarball using setuptools. The problem is that setuptools doesn't ... test_suite='nose.collector', ) See Question&Answers more detail:os...

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

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387 views

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python - PIL Image.resize() not resizing the picture

I have some strange problem with PIL not resizing the image. from PIL import Image img = Image.open('foo. ... its width, leaving height 100px. See Question&Answers more detail:os...

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

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364 views

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python - What is the difference between dict and collections.defaultdict?

I was checking out Peter Norvig's code on how to write simple spell checkers. At the beginning, he uses this ... one decide which one to use? See Question&Answers more detail:os...

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

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