a=range(5)
a

a.remove(3)

a.remove?

a

def divide():
    a = 1
    b = 4
    c = b / (a-1)

divide()

pwd

! open unpause_action.pdf

%timeit a*3

from IPython.lib.display import YouTubeVideo
YouTubeVideo('HaS4NXxL5Qc')

x = linspace(0, 2*pi)
y = sin(x)
plot(x,y)
show()

! head data/kaggle/wind_forecast/train.csv

import pandas as pd

def format_timestamp(raw):
        return '%s %s:00' % (raw[:-2], raw[-2:])

wind = pd.read_csv('data/kaggle/wind_forecast/train.csv', parse_dates=['date'], index_col=['date'], converters={'date':format_timestamp})
wind

wind.index

a = '2009-07-01'
b = '2009-07-03'
wind[a:b].plot()
ylabel('normalized wind power')

wind['wp1'][a:b].plot(color='red', label='raw power')
pd.ewma(wind['wp1'], span=100)[a:b].plot(color='blue', label='smoothed')
legend()

from sympy import *
v = symbols('v')
integrate(log(v), v)