I have the following code, in Django: Now, I want to use the mixin without blatting the behaviour of the save in Parent. So I when I save, I want to do stuff C, B, and A. I’ve read Calling the setter of a super class in a mixin however I don’t get it and having read the super docs
Tag: python
How to get the latest file in a folder?
I need to get the latest file of a folder using python. While using the code: I am getting the below error: FileNotFoundError: [WinError 2] The system cannot find the file specified: ‘a’ Answer Whatever is assigned to the files variable is incorrect. Use the following code.
What is the proper way of testing throttling in DRF?
What is the proper way of testing throttling in DRF? I coulnd’t find out any answer to this question on the net. I want to have separate tests for each endpoint since each one has custom requests limits (ScopedRateThrottle). The important thing is that it can’t affect other tests – they have…
Django: Not Found static/admin/css
I just deployed my first Django app on Heroku but I notice that it doesn’t have any CSS like when I runserver on the local machine. I know there’s something wrong with static files but I don’t understand much about it even when I already read the docs. I can do python3 manage.py collectstati…
Use None instead of np.nan for null values in pandas DataFrame
I have a pandas DataFrame with mixed data types. I would like to replace all null values with None (instead of default np.nan). For some reason, this appears to be nearly impossible. In reality my DataFrame is read in from a csv, but here is a simple DataFrame with mixed data types to illustrate my problem. I…
How to add custom annotations, from the dataframe, to a stacked bar chart?
I’m plotting a cross-tabulation of various offices within certain categories. I’d like to put together a horizontal stacked bar chart where each office and its value is labeled. Here’s some example code: This gives me a fine starting point: However, what I’d like to have is this: After…
Visualize an RDFLIB Graph in Python
I am new to RDFLIB in python. I found this example of creating a graph on here. What is the simplest way to visualize graph created by this code? I see that the rdflib package has a tools component that has a function called rdfs2dot. How can I use this function to display a plot with the RDF graph in
How to install PyPdf2 in PyCharm (Windows-64 bits)
I want to install PyPdf2 in PyCharm for Windows (64 bits) I have tried to go to SettingsProjectProject Interpreter, Then pressing the “+” sign, but It did not found PyPdf2. I already Installed it to the normal python2.7 by going to the extracted path of PyPdf2 then I run (python.exe setup.py insta…
In TensorFlow, how can I get nonzero values and their indices from a tensor with python?
I want to do something like this. Let’s say we have a tensor A. And I want to get nonzero values and their indices from it. There are similar operations in Numpy. np.flatnonzero(A) return indices that are non-zero in the flattened A. x.ravel()[np.flatnonzero(x)] extract elements according to non-zero in…
Python function that takes one compulsory argument from two choices
I have a function: However, my intention is for the function to take only one argument (either title OR pageid). For example, delete(title=”MyPage”) or delete(pageid=53342) are valid, while delete(title=”MyPage”, pageid=53342), is not. Zero arguments can not be passed. How would I go a…