Convergence between a data lake and data warehouse is not just in talks but in reality. “Convergence is happening from both sides. The data warehouse vendors are gradually moving from their existing model to the convergence of the data warehouse and data lake model. Similarly, the vendors who started their journey on the data lake-side are now expanding into the data warehouse space.”

The gap is going to narrow down between these two platforms this year. Qubole is thinking in that direction where most of the problems we try to decipher can be solved by the data warehouse. The data lake is going to be the superset that can decipher all data warehouses problems along with more capabilities.”

#big_data

The blog narrates how the underlying data infrastructure influences the ML development in line with the recent trends on "Reverse ETL" and the modern cloud-native data stack. The blog also reiterates we are still in the early stages of MLOps, Data Quality tooling, and unified data architecture on the path to industrialization ML development.

https://medium.com/validio/ml-data-trends-wrapping-up-2020-and-looking-into-2021-beyond-b3ff1eadc211

#ml

Apache Airflow published the 2020 Airflow survey results:
🔸 13.79 adoption of the general developer community outside the data engineers.
🔸 85% of people using Airflow like/ very likely recommends Airflow.
🔸 Airflow local executor popular than the Kubernetes executor
🔸 Slack & Github is a go-to place for technical questions, 2X higher than StackOverflow

#big_data

​​Somebody did a simulation of a giant banana orbiting around the earth at the distance of the ISS.

And, surprisingly, it challenges our intuitions of how orbiting objects would look like in the sky.

Source

This time we gonna talk about pizza and ML

https://luminousmen.com/post/machine-learning-types

Most of the major roadblocks I ran into were not technical, they were communicative. Sure, there were always technical challenges but that’s the role of an engineer, to fix the technical challenges. Never underestimate the importance of communication, internal and external. There’s nothing worse than solving a technical challenge when it was the wrong technical challenge to be solved.

#soft_skills

And this week we're gonna talk about a hobby project Van Rossum did over Christmas break 1989. Yep, it's Python. Again, nothing specific, just some rambling about the topic, should be interesting though.

There is a common misconception that GIL was invented to protect developers from problems with concurrent access to data. But this is not true.

GIL, of course, will prevent you from parallelizing an application using threads (but not processes). Simply put, GIL is a lock that must be taken before any access to Python (not that important if Python code is executing or calls using Python C API). Therefore, GIL will protect internal structures from non-consistent states, but you will have to use synchronization primitives like in any other language.

#python

The popular method to declare an abstract method in Python is to use NotImplentedError exception:

def func(self):
    raise NotImplementedError

Though it's pretty popular and even has IDE support (Pycharm considers such a method to be abstract) this approach has a downside. You get the error only upon method call, not upon class instantiation.

Use abc module to avoid this problem:

from abc import ABCMeta, abstractmethod
class Service(metaclass=ABCMeta):
    @abstractmethod
    def func(self):
        pass

#python

In Python if there are no references to the object, it is destroyed immediately, instead of waiting for garbage collection. GC is needed for complicated cases when we have cyclic references.

#python

The list may contain itself. Python detects this and does not loop in the output.

>>> a = []
>>> a.append(a)
>>> a
[[...]]

#python

Python doesn't have tail recursion optimization, not because Guido couldn't handle it, but because he doesn't want to overcomplicate things.

If you really want to, you can implement a Y-combinator with optimization and use it.

#python

Just like tail recursion in Python, Guido wanted to avoid getting lambda functions in the language. The lambda function is just sort of syntactic sugar. It creates an unnamed function - that's literally it. There is no magic to it.

Those two are equivalent:

foo = lambda x: x * 2

def foo(x): 
   return x * 2 
foo.__qualname__ = '<lambda>' 

We all know the lambda functions were introduced in the language, but there was a long fight behind it, which Guido did not win. Lambda still exists because it is extremely convenient and nothing else.

#python

A function can have two returns called. For example:

def foo():
    try:
        return 1
    finally:
        return 2

2 will be returned here.

#python

There are compilers for Python code. And not only JIT ones like Numba, but also ordinary ones. For example, Cython, Nuitka that compiles your Python code into true machine instructions rather than interpreted.

Why?

Basically for the sake of both performance gains and a more portable runtime. So basically it's for the guys who shouldn't use Python in the first place.

#python

Remember I told you about numbers from -5 to 255 interned. That is, the numbers are preliminary placed and cached in memory. So, there is more to it.

You can access this memory if you want and change value. Say, change literal 4 to value 5. I'll probably be damned by many people for this post, but here is a sample code:

>>> import ctypes
>>> ctypes.memmove(id(4) + 24, id(5) + 24, 8)
>>> print(2 * 2) # 5

Have fun debugging!

P.S. Try to replace 0 with 1

#python

Let's talk about a couple of core concepts in data space and how they relate to each other and how they started.

⚡️ACID vs BASE: Comparison of two Design Philosophies

⚡️CAP and PACELC theorems in plain English

Google has made its AutoML algorithm public🤯

https://github.com/google/model_search

#ml