from perspective import psp

import pandas as pd
import numpy as np
import datetime

N = 1000

dft = pd.DataFrame({
    'A': ['spam', 'eggs', 'spam', 'eggs'] * 6 * N,
    'B' : ['alpha', 'beta', 'gamma'] * 8 * N,
    'C' : [np.random.choice(pd.date_range(datetime.datetime(2012,1,1),datetime.datetime(2013,1,3))) for i in range(24 * N)],
    'D' : np.random.randn(24 * N),
    'E' : np.random.random_integers(0,4,24 * N)
})