yoavg

Reinforcement Learning for Language Models

Yoav Goldberg, April 2023.

Why RL?

With the release of the ChatGPT model and followup large language models (LLMs), there was a lot of discussion of the importance of "RLHF training", that is, "reinforcement learning from human feedback". I was puzzled for a while as to why RL (Reinforcement Learning) is better than learning from demonstrations (a.k.a supervised learning) for training language models. Shouldn't learning from demonstrations (or, in language model terminology "instruction fine tuning", learning to immitate human written answers) be sufficient? I came up with a theoretical argument that was somewhat convincing. But I came to realize there is an additional argumment which not only supports the case of RL training, but also requires it, in particular for models like ChatGPT. This additional argument is spelled out in (the first half of) a talk by John Schulman from OpenAI. This post pretty much

BrianLincoln

Copy Likes to a playlist in YouTube Music

This is a very hacky solution to copy Liked songs to a playlist since YTM still doesn't have the functionality. I'm using this to copy songs out of YTM to another service, then unsubscribing. Thus, I won't be maintaining it (or ever using it again). It will only work while the YTM interface is the same as it is today (3/6/21) and will break once they make updates.

Steps to use:

1. Create a new playlist
2. Go to your Likes page (in chrome, on a desktop or laptop). Scroll to the bottom so all songs are loaded
3. Open Chrome's dev tools (F12 on windows), go to the console
4. Paste the script below. Edit the first line, replace "YOUR_PLAYLIST_NAME" with your playlist's name
5. Press enter

JungeAlexander

# From http://stackoverflow.com/a/11158224

# Solution A - If the script importing the module is in a package
from .. import mymodule

# Solution B - If the script importing the module is not in a package
import os,sys,inspect
current_dir = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))
parent_dir = os.path.dirname(current_dir)
sys.path.insert(0, parent_dir) 

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

henrik

tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name: