Python

09 September 2026 17:55

You can, but that's bad practice and domain is about your business logic and that's, I think, strange to validate something here

And you need to map models to your ORM (or whatever you use) models probably, and dataclasses is better here

Pydantic here is like using ladle where you can use spoon

Python

09 September 2026 17:48

so i though pydantic's BaseModel will replace the my core python things what do you say will thsi really bad to use Pydantic's models here for store data and pass to another places

Python

09 September 2026 17:32

Anyone blogging websites expert here

Python

09 September 2026 06:34

Python basic project ideas

Python

08 September 2026 22:32

i think a have already saw type as a keyword... what exactly means?

Python

08 September 2026 18:16

https://docs.python.org/3/library/typing.html

i was reading this docs, and first i encounter this new things, actually i learn little about type hint when using sqlmodel, pydantic like things, but when i read this docs i found in our code we can use like this,

type Vector = list[float]

Vector = list[float]

from typing import TypeAlias
Vector: TypeAlias = list[float]

Python

08 September 2026 09:23

https://wiki.python.org/moin/BeginnersGuide/NonProgrammers

Python

08 September 2026 08:01

One thing at the time
Not all of them at once

Python

08 September 2026 07:57

What are you talking about?
What same network??
We are talking about data validation and rules enforcment.

If you mean Docker, this is not the topic here

Python

08 September 2026 07:53

To enforce rules on database layer, go learn SQL
And for that specific DB engine (sqlite, postgres, etc...)

Python

08 September 2026 07:48

Yaa i will try to learn this so however even i do age=Field(lt199) still from external database connection anyone can use the value of 10000 like this and my database will not throw any error, is this a good approach or not? 😅

Python

08 September 2026 07:42

Maybe You means to say when i write gt0,lt199,
this validation will be done by my backend application which take the data via the model, actually database don't know if the value of any range, it support any int value right?

Python

08 September 2026 07:08

gt, lt or any other validation is done by Pydantic, not SQLAlchemy, so its enforced on runtime layer, not database layer

SQLModel is a combination of those two, and Pydantic is the one thats used for serialization and validation

To enforce rules on database layer, you need to use CheckConstraint in sa_column_args on your field

Python

08 September 2026 04:02

Hello Migrations/Alembic Knowing Friends, see my sqlmodel's table class was like this below:

https://hastebin.com/share/ocexinodug.python

Then i did, alembic alembic revision --autogenerate -m "initial migration first time"
As a result i got this below:

https://hastebin.com/share/avanecuqop.scss

What i foudn, this say i need to adjust this upgrade() function as my need always whenever i will do generate a migration script.

But as i am using sqlmodel, i am not fully sure about sqlalchemy's syntax, so what do you guys say how much i will sure this will work, at least what what part i need to learn so that i will sure this autogenerated upgrade() will not cause any issue?

Python

08 September 2026 03:09

I was trying to setup Alembic with my project, i think now i will use postgres later i will fully go to switch to the sqlite, so that my app will work same as before.

With SQLite, the ALTER TABLE command only supports adding or renaming columns. Any other change to columns or constraints is going to be rejected with an error.

Python

09 September 2026 17:52

Please ask smart questions.

Python

09 September 2026 17:34

No external dependencies in domain. Dataclass is better here

Python

09 September 2026 06:46

This is not a group to discuss project ideas.

Python

09 September 2026 05:17

See i want to store some data and then retrive those, so what do you say about this,

class OTPPolicy(
    BaseModel,
    frozen=True,
):
    validity_seconds: int = Field(
        gt=0,
    )

    cooldown_seconds: int = Field(
        gt=0,
    )

    max_attempts: int = Field(
        gt=0,
    )

    length: int = Field(
        gt=0,
        lt=100,
    )

Vs Below -> Also i then listen there is:


@dataclass(frozen=True)
class OTPPolicy:
    validity_seconds: int
    cooldown_seconds: int
    max_attempts: int
    length: int

Python

08 September 2026 22:18

Use type Vector = list[float] for Python 3.12+ and

Vector: TypeAlias = list[float]

Python

08 September 2026 16:45

Hello, good morning. I wanted to let you know that the Santander Open Academy is offering a completely free Introduction to Python Programming course. It will be open until December 31, 2026, for anyone who wants to start learning.

Python

08 September 2026 09:07

I need websites to take coaching of python

Python

08 September 2026 07:59

Yes pls sorry forgive me, i will just recreate all my things i got panic to make a proper application with database and external js things all mix, and i think i need to use a lot of things.

Now i am leaving the db topic, as i need to make one database, and only 1 repo should have access this i need to make my app like this right now?

Python

08 September 2026 07:54

yaa yaa you are right, i need to just use same network of my app and my database, so that only my db will be accessible by the app not by any other way, then i am fully ok and not issue ever about my database leak right?

Python

08 September 2026 07:52

What external database??
You dont make database accessible externally, why would you ever do that?

Only your application talks to your database
And your application enforces the rules

Python

08 September 2026 07:44

I meant what i said
I will not explain anymore, you need to know what you are using and how to use that

Python

08 September 2026 07:12

https://pythonbooks.org/free-books/

Python

08 September 2026 04:22

As i checked see, what i researched:
In my existing Class/Table i did add the age field:

age: int | None = Field(
    default=None,
    gt=0,
    lt=199,
)

def upgrade() -> None:
    """Upgrade schema."""
    # ###  please adjust! -Alembic ###
    op.add_column('usermodel', 
        sa.Column('age', 
            sa.Integer(), 
            nullable=True)
        )
    # ### end Alembic commands ###

Python

08 September 2026 03:40

Arey tell me from which play form I am able to learn coding and python for free

Python

07 September 2026 19:31

this is more an AI question more than a python one, but there are already tons of free AI assistants, look them up online