Python-сообщество

from matplotlib.pyplot import *
from numpy import linspace, cos, sin, sqrt, tan, sinh, cosh, tanh, fabs
from mpl_toolkits.mplot3d import Axes3D

r = 50
m = 0.038

 
t = linspace(-100.0, 100.0, 1000)
l = 0.9


x = r * cos(t) / cosh(m * (t-l))
y = r * sin(t) / cosh(m * (t-l))
z = r * tanh(m * (t-l))
 
fig = figure(figsize=(4,4))
ax = fig.add_subplot(111,projection='3d')
ax.view_init(30,60)
 
ax.plot(x,y,z)
 
ax.set_xlabel(r'x')
ax.set_ylabel(r'y')
ax.set_zlabel(r'z')

fig.savefig("Test.svg",bbox_inches="tight",\
        pad_inches=.15)