All Questions
Tagged with class-design python
31 questions
3
votes
1
answer
537
views
Object-oriented programming design with relational database tables
I want to understand what is considered best-practice to better align with OOP when handling relational databases. I cannot find any online examples where classes and a more maintainable/re-usable ...
- 147
-2
votes
1
answer
435
views
Defining functions inside vs outside a class
Say I have a class with a function do_thing that is comprised of multiple steps, which themselves segregate into functions (first_process and second_process). At what point would this be considered ...
- 177
2
votes
2
answers
952
views
Splitting up large SQLAlchemy model
Anybody have advice on splitting up a large SQLAlchemy model into smaller parts? I have a ~2000 line model called Article that is becoming difficult to manage. We often have to scroll and scroll to ...
- 129
2
votes
2
answers
2k
views
Why access the attributes of a Python class by reference?
Attribute references and instantiation
In this link, that is part of the official Python documentation, I have found the following information:
Class objects support two kinds of operations: ...
- 171
0
votes
1
answer
634
views
How to handle root paths in a custom package?
I am writing a custom python package, which produces some files in a certain directory. This directory I call root_path and should be set by the user. So basically, it should be a conf variable but ...
- 103
3
votes
3
answers
330
views
Referencing transient class attributes
I've just started dipping my feet into OOP.
Is it considered bad practice to have classes that reference attributes that depend on another function being called and thus may not exist (version 1)? I'...
- 177
0
votes
1
answer
997
views
Dependency Injection for dynamic objects
I am learning about Dependency Injection and I have been recently implementing the following classes for an app that executes commands over ssh using Python. I am confused about whether I am using it ...
-1
votes
1
answer
3k
views
Calling helper functions in a Python `__init__` function
Problem
I am currently working with a class that necessarily has a very complicated initialization function (>350 lines of code) given that many computations and attributes need to be performed and ...
- 123
-1
votes
2
answers
3k
views
Initializing instance variables from json file
I have a class whose instance variables should be initialized from a file ('settings.json'). That file does not always exist or is sometimes not filled with useful values, so I have to check for that ...
-3
votes
1
answer
71
views
Should I design a class to handle my other class or the attribute of my other class?
Please allow me to illustrate my question with a simple example. Let's suppose we have a Customer class:
class Customer:
def __init__(self, name, surname, email):
self.name = name
...
- 223
2
votes
0
answers
35
views
Update class member gradually [duplicate]
Consider the following:
import typing
class MyClass(object):
def __init__(self):
self.my_member: typing.Optional[dict] = None
def update_member(self):
self.my_member = {}
...
- 129
0
votes
0
answers
118
views
"Best practice" or "design pattern" to group a class with "associated" classes in an object-oriented language
Sometimes a class A can have an "associated" class B such that the implementation of B depends on the implementation of A. For example, this can happen when B's objects are to be created by A's ...
- 958
2
votes
2
answers
4k
views
Module with globals or Class with attributes?
Currently I'm working with a lot of modules where the original developers used global variables to control states and to exchange important information between functions, like so:
STATE_VAR = 0
def ...
- 131
2
votes
0
answers
97
views
Is assigning a method in the constructor good practice? [closed]
Here's a class with a method that calls different functions based on a parameter set in the constructor:
functions = {
"arg1": f1,
"arg2": f2,
"arg3": f3
}
class C:
def __init__(self,...
- 159
0
votes
2
answers
2k
views
"private methods" vs method out of class in a python module
I have a module with the class Foo. Foo has three methods:
The constructor(__init__())
An error handling method (_error_handler())
The method that actually does something. (run())
Then, I have a bunch ...
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