import math
import numpy as np
import matplotlib.pyplot as plt
import PySpice.Logging.Logging as Logging
logger = Logging.setup_logging()
from PySpice.Plot.BodeDiagram import bode_diagram
from PySpice.Spice.Netlist import Circuit
from PySpice.Unit import *
circuit = Circuit('Low-Pass RC Filter')
circuit.SinusoidalVoltageSource('input', 'in', circuit.gnd, amplitude=1@u_V)
R1 = circuit.R(1, 'in', 'out', 1@u_kΩ)
C1 = circuit.C(1, 'out', circuit.gnd, 1@u_uF)
# The break frequency is given by fc=12πRC
break_frequency = 1 / (2 * math.pi * float(R1.resistance * C1.capacitance))
print("Break frequency = {:.1f} Hz".format(break_frequency))
simulator = circuit.simulator(temperature=25, nominal_temperature=25)
analysis = simulator.ac(start_frequency=1@u_Hz, stop_frequency=1@u_MHz, number_of_points=10, variation='dec')
# print(analysis.out)
# We plot the Bode diagram.
figure = plt.figure(1, (20, 10))
plt.title("Bode Diagram of a Low-Pass RC Filter")
axes = (plt.subplot(211), plt.subplot(212))
bode_diagram(axes=axes,
frequency=analysis.frequency,
gain=20*np.log10(np.absolute(analysis.out)),
phase=np.angle(analysis.out, deg=False),
marker='.',
color='blue',
linestyle='-',
)
for axe in axes:
axe.axvline(x=break_frequency, color='red')
plt.tight_layout()
plt.show()2026-09-21 12:51:43,392 - PySpice.Spice.NgSpice.Shared.NgSpiceShared._init_ngspice - WARNING - Unsupported Ngspice version 39
2026-09-21 12:51:43,410 - PySpice.Probe.WaveForm.WaveForm.__array_ufunc__ - WARNING - Should be unit less
2026-09-21 12:51:43,411 - PySpice.Probe.WaveForm.WaveForm.__array_ufunc__ - WARNING - Should be unit less
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
File /usr/local/lib/python3.12/site-packages/matplotlib/scale.py:178, in _make_axis_parameter_optional.<locals>.wrapper(self, *args, **kwargs)
176 try:
177 # Try old signature.
--> 178 sig.bind(self, *args, **kwargs)
179 except TypeError:
180 # Use the new signature and pass in an unused axis=None.
File /usr/local/lib/python3.12/inspect.py:3259, in Signature.bind(self, *args, **kwargs)
3255 """Get a BoundArguments object, that maps the passed `args`
3256 and `kwargs` to the function's signature. Raises `TypeError`
3257 if the passed arguments can not be bound.
3258 """
-> 3259 return self._bind(args, kwargs)
File /usr/local/lib/python3.12/inspect.py:3248, in Signature._bind(self, args, kwargs, partial)
3247 else:
-> 3248 raise TypeError(
3249 'got an unexpected keyword argument {arg!r}'.format(
3250 arg=next(iter(kwargs))))
3252 return self._bound_arguments_cls(self, arguments)
TypeError: got an unexpected keyword argument 'basex'
During handling of the above exception, another exception occurred:
TypeError Traceback (most recent call last)
Cell In[15], line 9
5
6 figure = plt.figure(1, (20, 10))
7 plt.title("Bode Diagram of a Low-Pass RC Filter")
8 axes = (plt.subplot(211), plt.subplot(212))
----> 9 bode_diagram(axes=axes,
10 frequency=analysis.frequency,
11 gain=20*np.log10(np.absolute(analysis.out)),
12 phase=np.angle(analysis.out, deg=False),
File /usr/local/lib/python3.12/site-packages/PySpice/Plot/BodeDiagram.py:59, in bode_diagram(axes, frequency, gain, phase, **kwargs)
58 def bode_diagram(axes, frequency, gain, phase, **kwargs):
---> 59 bode_diagram_gain(axes[0], frequency, gain, **kwargs)
60 bode_diagram_phase(axes[1], frequency, phase, **kwargs)
File /usr/local/lib/python3.12/site-packages/PySpice/Plot/BodeDiagram.py:36, in bode_diagram_gain(axe, frequency, gain, **kwargs)
34 def bode_diagram_gain(axe, frequency, gain, **kwargs):
---> 36 axe.semilogx(frequency, gain, basex=10, **kwargs)
37 axe.grid(True)
38 axe.grid(True, which='minor')
File /usr/local/lib/python3.12/site-packages/matplotlib/axes/_axes.py:1898, in Axes.semilogx(self, *args, **kwargs)
1858 """
1859 Make a plot with log scaling on the x-axis.
1860
(...) 1893 Objects representing the plotted data.
1894 """
1895 d = {k: v for k, v in kwargs.items()
1896 if k in ['base', 'subs', 'nonpositive',
1897 'basex', 'subsx', 'nonposx']}
-> 1898 self.set_xscale('log', **d)
1899 return self.plot(
1900 *args, **{k: v for k, v in kwargs.items() if k not in d})
File /usr/local/lib/python3.12/site-packages/matplotlib/axes/_base.py:75, in _axis_method_wrapper.__set_name__.<locals>.wrapper(self, *args, **kwargs)
74 def wrapper(self, *args, **kwargs):
---> 75 return get_method(self)(*args, **kwargs)
File /usr/local/lib/python3.12/site-packages/matplotlib/axis.py:822, in Axis._set_axes_scale(self, value, **kwargs)
819 old_default_lims = (self.get_major_locator()
820 .nonsingular(-np.inf, np.inf))
821 for ax in self._get_shared_axes():
--> 822 ax._axis_map[name]._set_scale(value, **kwargs)
823 ax._update_transScale()
824 ax.stale = True
File /usr/local/lib/python3.12/site-packages/matplotlib/axis.py:791, in Axis._set_scale(self, value, **kwargs)
789 def _set_scale(self, value, **kwargs):
790 if not isinstance(value, mscale.ScaleBase):
--> 791 self._scale = mscale.scale_factory(value, self, **kwargs)
792 else:
793 self._scale = value
File /usr/local/lib/python3.12/site-packages/matplotlib/scale.py:946, in scale_factory(scale, axis, **kwargs)
943 scale_cls = _api.getitem_checked(_scale_mapping, scale=scale)
945 if _scale_has_axis_parameter[scale]:
--> 946 return scale_cls(axis, **kwargs)
947 else:
948 return scale_cls(**kwargs)
File /usr/local/lib/python3.12/site-packages/matplotlib/scale.py:181, in _make_axis_parameter_optional.<locals>.wrapper(self, *args, **kwargs)
178 sig.bind(self, *args, **kwargs)
179 except TypeError:
180 # Use the new signature and pass in an unused axis=None.
--> 181 init_func(self, None, *args, **kwargs)
182 else:
183 # Use the old signature.
184 init_func(self, *args, **kwargs)
TypeError: LogScale.__init__() got an unexpected keyword argument 'basex'
I used the bode plot example from the documentation Ref: https://pyspice.fabrice-salvaire.fr/releases/v1.3/examples/filter/low-pass-rc-filter.html
It seems I can see two errors from long time
IT gives the following error