matplotlib

# ■■■　コールコールプロット
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.patches as patches
import cmath
import math
from google.colab import files

R= 2000
C = 0.1e-6
Rs = 500

t = np.arange(start = 0, stop = 5, step = 0.05)
f = [pow(10,p) for p in t]
z = [1/(1/R+1j*2*np.pi*p*C) + Rs for p in f]
x = [ p.conjugate().real for p in z]
y = [ p.conjugate().imag for p in z]
r = [ abs(p.conjugate()) for p in z]
ph = [ cmath.phase(p.conjugate())/math.pi*180 for p in z]
#ph = [ math.atan2(p.imag, p.real) for p in z]

ax = plt.subplot2grid((2, 2), (0, 0), rowspan=2)
ax.set_aspect('equal')
ax.set_xlabel("$Z^{\prime}$ / $\Omega$")
ax.set_ylabel("$-Z^{\prime \prime}$ / $\Omega$")
plt.scatter(x, y,alpha=0)
x_min, x_max = ax.get_xlim()
y_min, y_max = ax.get_ylim()
ax.set_xlim(0, x_max)
ax.set_ylim(0, y_max)

for t in np.arange(start = 500, stop = 2000, step = 500):
  ax.add_patch(patches.Circle(xy=(0, 0), radius=t, fc='none', ec='#B0FFFF'))

for t in np.arange(start = 1, stop = 12, step = 1):
  ax.axline((0, 0), slope=math.tan(math.pi*t/24), color='#B0FFFF')

plt.plot(x, y)

ax = plt.subplot2grid((2, 2), (0, 1))
ax.set_xlabel("$f$ / Hz")
ax.set_ylabel("$|Z|$ / $\Omega$")
plt.xscale('log')
plt.plot(f, r)

ax=plt.subplot2grid((2, 2), (1, 1))
ax.set_xlabel("$f$ / Hz")
ax.set_ylabel("$\u03b8$ / deg") # \theta では表示できない
plt.xscale('log')
plt.plot(f, ph)

plt.savefig('fig_cole_cole_python.SVG');files.download("fig_cole_cole_python.SVG")
plt.savefig('fig_cole_cole_python.PNG');files.download("fig_cole_cole_python.PNG")

# ■■■　コールコールプロット