if so

k = 130
m = 7655

if k > 42:
    print 'Hi'
elif m > 43:
    print 'Hello'
else:
    print 'Bye'

======================== RESTART: C:/Python27/test.py ========================
Hi
>>> 

import numpy

n = numpy.zeros(5)
n[0] = 20.
n[4] = 99.

print n
print n[-1]

import numpy

p = numpy.zeros([2, 3])

p[0, 1] = 7.
p[1, 2] = 8.

print p
p = 1. + 2. * p

print p

def three_times(u):
    r = 2 * u
    return r + u

print three_times(1), three_times(7)

======================== RESTART: C:/Python27/test.py ========================
3 21
>>> 

import math
from xxx import *

def sin_cos():
    num_points = 50

    x = numpy.zeros(num_points)
    sin_x = numpy.zeros(num_points)
    cos_x = numpy.zeros(num_points)

    for i in range(num_points):
        x[i] = 2. * math.pi * i / (num_points - 1.)
        sin_x[i] = math.sin(x[i])
        cos_x[i] = math.cos(x[i])

    return x, sin_x, cos_x

x, sin_x, cos_x = sin_cos()

@show_plot
def plot_me():
    matplotlib_pyplot.plot(x, sin_x)
    matplotlib_pyplot.plot(x, cos_x)
plot_me()