Decouple code with DEPENDENCY INJECTION in Python

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This video shows how to decouple your code by using dependency injection in Python. It also shows the benefits of dependency injection by replacing storage logic with minimal risk of breaking stuff.

C H A P T E R S
0:13 Setting up the project
0:43 The window class
2:04 Window and file logic is coupled
2:20 Extract the save logic
2:40 Decouple by injecting storage object
4:25 Benefits of the decoupled code
4:47 Replace file storage with database storage

M Y O N L I N E T R A I N I N G

#dependencyinjection #programming #python

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This is how programming (and any other topic) should be presented. Brilliant explanation.

rodmallen

I can't begin to express how wonderful this instructional video is. Though short, it perfectly illustrates DI from start to finish with a clear example of the benefit without using long verbose code. This video, which took me 30 min to get through with code along and note taking is better than anything I've seen written to date. Nevermind that the Window class could be potentially split more, that is just splitting hairs. The video is about DI and clearly demonstrates it. You've got a new sub and buyer of the udemy course!

machinimaaquinix

this is save my time, thanks a lot sir

sonyalamsyah

dependency injection vs composition what is the difference.. please make a video

KASANITEJ

Why not use methods instead of classes? The savetext method can be passed to the object and by default could be put to the savetext method right there.

aoeu

I think your Window() class violates the first principle of SOLID. It has many responsabilities

And-vgij

Didn't explain the problem thoroughly...

Good video overall

chriskeo

you get the concept wrong. Window class still depends on TextFile class's fucntion. if TextFile change its save_text function name, it will yield error in Window class.

rafathasan

You can't fool me, I know you're Dutch as fuck

AwesomeAsh

there is no need to create a class for saving, just use a function.
A class with one just method, which is instantiated just to call the method and then thrown away, is a clear sign that the coder does not yet understand Python and the capabilities of dynamic languages.

alexd

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