pinject | A pythonic dependency injection library | Dependency Injection library
kandi X-RAY | pinject Summary
kandi X-RAY | pinject Summary
A pythonic dependency injection library.
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Top functions reviewed by kandi - BETA
- Create a new object graph
- Create a new ArgBindingKey
- Verify required bindings
- Return a list of implicit class bindings
- Provides an instance of the class
- Get the key binding of a method
- Returns the kwargs passed to the function
- Create kwargs from the given arguments
- Decorator to inject a function into a function
- Creates a decorator for the given decorator
- Augment decorator
- Return True if this key conflicts with any argument binding key
- Provides an instance of the given class
- Verify element type
- Return the location of the back frame
- Get version number
- Format a version string
- Copy public fields to public fields
- Copy the arguments to the wrapped function
- Decorator to copy function arguments to internal fields
- Call a provider function with injection context
pinject Key Features
pinject Examples and Code Snippets
Lines of Code : 31License : Strong Copyleft (CC BY-SA 4.0)
Copyclass Core:
def decide(self, data):
return False
class Tokenizer:
def tokenize(self, query):
return [] # ...
class Processor:
tokenizer_class = Tokenizer
core_class = Core
def process(self, query):# core.py
class Core:
def decide(self, data):
""" Makes decisions based on input data """
# blah blah
# tokenizer.py
class Tokenizer:
def tokenize(self, query):
""" Tokenize the input query string """
from unittest.mock import Mock, patch
from django.tests import TestCase
class MySimpleViewTestCase(TestCase):
@patch('module_name.dependency2')
@patch('module_name.dependency1.specific_method_or_attribute')
def test_something_Community Discussions
Trending Discussions on pinject
QUESTION
Good day! Please tell me how you can solve the following problem in Python + FastAPI.
There is a test project:
...ANSWER
Answered 2020-Oct-05 at 12:37As noted in the comments, a dependency can be anything that is a callable and thus a class as well. The only caveat in the latter case is that the class will only be initialized (i.e. only the init(..) function will be called).
So, in order to have a class as dependency, as in the example of https://fastapi.tiangolo.com/tutorial/dependencies/classes-as-dependencies/#shortcut you just need to call the target functions within the init and set the values as attributes of the class.
QUESTION
I have 5 classes as shown below. The execution starts at class 5. Here dependency injection is being used as the listener object is passed to the constructor of the Bot class and then that object calls listen() method. This part is fine.
The trouble starts from now on.
From the listen() method I call another method called process() which is in the Processor class (processor.py file). Then the process() method calls two other methods from 2 different classes Tokenizer and Core.
As you can see all these are coupled and dependency injection is not used here. I'm not sure how to.
I have tried out examples of python dependency-injector package and pinject package but those examples relate with single level dependencies and not cases like this as far as I can understand.
I have thought of creating all required objects in one module and passing it as parameters to all classes when required. But that doesn't seem like a good practice.
What can I do to decouple the above code? How should I go about modularizing this?
...ANSWER
Answered 2020-Apr-10 at 16:47I think you can rethinking this design having in mind two concepts:
- Python Multiple Inheritance to design your classes.
- Usage of super() and Python's Method Resolution Order (MRO) to inject mocks for classes' dependencies within test code.
Regarding the first point, your classes will look like:
QUESTION
I want to use dependency injection for my django project. For that I'm trying pinject package. Like in ASP.NET, all the dependencies are given in the constructor, and that's very nice because it's easy to test. I would also like to archive something similar in my django project.
I have a simple View:
...ANSWER
Answered 2019-Aug-08 at 20:38If your goal is to provide yourself with an easy and safe way to 'mock and test', then you are probably better of using the mock library provided by unittest (which by the way is also a lot like mocking in .NET). With this, you can do something like this:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install pinject
You can use pinject like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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