Skip to content

Instantly share code, notes, and snippets.

@ypeleg
ypeleg / gradient_boost.py
Created December 7, 2020 16:42
Keras GrowNet gradient boost
import tensorflow as tf
from copy import deepcopy
import tensorflow.keras.backend as K
from tensorflow.keras.optimizers import Adam
from tensorflow.keras.models import Model, clone_model
from tensorflow.keras.layers import Input, Dropout, Dense, ReLU, BatchNormalization, Activation, Concatenate
class DynamicNet(object):
def __init__(self, c0 = None, lr = None, concat_input=False, additive_boosting=False, encoder_layers=None):
@JiaminXuan
JiaminXuan / iMF.py
Last active September 17, 2020 09:34
implicit Matrix Factorization - keras
import numpy as np
from numpy import bincount,ravel,log
from scipy.sparse import coo_matrix
import pandas as pd
from keras import backend as K
from keras.layers import *
from keras.models import Model,Sequential
def imf_loss(y_true, y_pred):
C=1+2*y_true
@awjuliani
awjuliani / ContextualPolicy.ipynb
Last active October 11, 2022 21:27
A Policy-Gradient algorithm that solves Contextual Bandit problems.
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
@staltz
staltz / introrx.md
Last active May 6, 2025 07:45
The introduction to Reactive Programming you've been missing
@rgreenjr
rgreenjr / postgres_queries_and_commands.sql
Last active May 3, 2025 05:25
Useful PostgreSQL Queries and Commands
-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query
FROM pg_stat_activity
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%'
ORDER BY query_start desc;
-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query
FROM pg_stat_activity
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%'