Using Python to simulate an LTspice netlist

Question

I am new to Python, and I want to simulate LTspice circuits automatically using Python.

I added the library ltspice and scripted a fair amount in order for Python to automatically generate an LTspice netlist I want.

The problem I am facing is that I don't know what command I should use to simulate the netlist in LTspice using Python so I can plot the output voltages and currents.

Looking forward to your suggestions.

Answer 1

Errrm.

What's unclear about the examples on the Python ltspice library page?

Example circuit:

Example code:

import ltspice
import matplotlib.pyplot as plt
import numpy as np
import os

l = ltspice.Ltspice(os.path.dirname(__file__)+'\\rc.raw') 
# Make sure that the .raw file is located in the correct path
l.parse() 

time = l.getTime()
V_source = l.getData('V(source)')
V_cap = l.getData('V(cap)')

plt.plot(time, V_source)
plt.plot(time, V_cap)
plt.show()

Example output:

You have named nodes (cap and source) and ask for the data using the following line:

l.getData('V(source)')

"getData" is the function. "V()" tells LTspice you want the voltage, and "source" says which node.

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From the comments, it seems that the ltspice library only does part of what you need.

This project seems to cover the other half - namely, making LTspice execute a simulation from within a Python program.