Tag: python

Multiple lambda outputs in string replacement using apply [Python]

I have a list of “states” from which I have to iterate: states = [‘antioquia’, ‘boyaca’, ‘cordoba’, ‘choco’] I have to iterate one column in a pandas df to replace or cut the string where the state text is found, so I try: And the result is: Result w…

DRF – Relate an object to another using views, serializers and foreign key

django django-rest-framework foreign-keys json python

Basically I have two models with one-to-one relationship. And I want retrieve information from one, when I call the other. My models: So I can just call an POST and create an Customer, that customer will have id, first_name and last_name. For now everything is working. But when I try to call my endpoint to cr…

How to exclude Optional unset values from a Pydantic model using FastAPI?

fastapi optional-parameters pydantic python

I have this model: So I want to be able to take requests like: and Right now in the second case I get using this code: So how can I exclude n_processes here? Answer You can use exclude_none param of Pydantic’s model.dict(…): Output: Also, it’s more idiomatic to write Optional[int] instead of…

Share RLock between multiple instances of Python with multiprocessing

daemon locking multiprocessing python reentrantlock

Consider this MWE: When this script is executed, it instantiates the_setup and serves it. Then I want clients to be able to do things like this from other scripts: However, I get RuntimeError: RLock objects should only be shared between processes through inheritance. If the with the_setup.hold_hardware(): is …

Adding json value in yml in python changing the format to yml again

json python python-3.x pyyaml yaml

I have to fetch json data and paste it in one of the values in yml. But it is converting it to yml format. I want the output as below but with the above script it is showing all the data in dictionary format format. I would like to replace the sampleyaml with the added changes. Please help me. Answer

convert multiple units to KG in pandas

numpy pandas python

let’s say i have this code(which is obviously wrong) I want to apply such condition to each value in a column(weights) based on another column(weight unit). Is there an efficient way to do it. Preferably allowing a func pass so easy to modify Answer Don’t use a function, this will be slow. numpy.v…

if statement for columns in 2D list

python

I need to iterate two different lists of integers with an if-statement that requires a mathematic operation. I’ve approached this in several ways, the latest one shown below. I have 4 lists that I’ve extracted from columns in a CSV file: I need to identify the names for those competitors who are o…

Regex Match on String (DOI)

doi python regex

Hi I’m struggling to understand why my Regex isn’t working. I have URL’s that have DOI’s on them like so: And I’m using for example this Regex, but it always returns empty? Where have I gone wrong? Answer It looks like you come from another programming language that has the notio…