What they are?

In Python class, there are two kinds of variables: class variables and instance variables.

Hello, as a Pythonista, sometimes I have been confused about how to use import correctly and efficiently. This article will cover all things I know about it.

Generative Deep Learning

Introduction to Generative Adversarial Networks (GANs) (对抗生成网络)

Combined by a forger network and an expert network.

• Generator network
  • Input: random vector (a random point at a latent space)
  • Output: synthetic image
• Discriminator Network
  • Input: image (real or synthetic)
  • Output: predict where this image comes from.

combine two varchar

concat('a', 'b')
in group: group_concate(distinct name order by name separator ',')

Select

should use is null, not = null because NULL is a special marker to indicate a data value does not exist, not a data value. So that cannot use = to check for equality.

left and right join are outer join.

start new:

tmux

start new with session name:

tmux new -s myname

Type

This article introduce four types of testing methods, such as system testing, E2E testing, unit testing, and integration testing.

PATH

echo $PATH to display the variables.

And use PATH DEFAULT=${PATH}:/path/to/file to add a new one.

Semantic Versioning

It is an industry convention.