r2007

#/usr/bin/env python

from pandas import np
from pandas.io.data import DataReader


def historical_volatility(sym, days):
    "Return the annualized stddev of daily log returns of `sym`."
    try:
        quotes = DataReader(sym, 'yahoo')['Close'][-days:]

r2007

Every so often I have to restore my gpg keys and I'm never sure how best to do it. So, I've spent some time playing around with the various ways to export/import (backup/restore) keys.

Method 1

Backup the public and secret keyrings and trust database

cp ~/.gnupg/pubring.gpg /path/to/backups/
cp ~/.gnupg/secring.gpg /path/to/backups/
cp ~/.gnupg/trustdb.gpg /path/to/backups/

or, instead of backing up trustdb...

r2007

# for web2py
cache
databases
errors
sessions
uploads

# inherit https://github.com/github/gitignore/blob/master/Python.gitignore

*.py[co]