from pylab import plot,ylim,xlabel,ylabel,show
from numpy import linspace,sin,cos

x = linspace(0,10,100)

y1 = sin(x)
y2 = cos(x)

plot(x,y1,"k-")
plot(x,y2,"k--")

ylim(-1.1,1.1)

xlabel("x axis")
ylabel("y = sin x or y = cos x")

show()