rodrigobercini

# Instalando e importando yahooquery
from yahooquery import Ticker

# Período máximo
petr = Ticker("PETR4.SA")
petr.history(period='max')

# Datas específicas
petr.history(start='2005-05-01', end='2013-12-31')

martinsotir

Google AI Platform Notebook tips

AI Notebooks vs Colab

Google Colab: https://colab.research.google.com/

• Free compute! and interesting, fixed cost, 10$/month Google Colab Pro version.
• Notebooks are very easy to share, with ability to control permissions (integration in google drive/doc ecosystem).
• Instant availability. No requirement other than a regular google account.
• Idle time limit : 1h in free version.

bshishov

import numpy as np

EPSILON = 1e-10


def _error(actual: np.ndarray, predicted: np.ndarray):
    """ Simple error """
    return actual - predicted

ruoyu0088

rgreenjr

-- 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%'