print_symbolic_results / print_symbolic_transfer_functions: sort key bug

[tPkl]

I encountered a runtime error using the cli to retrieve the symbolic solution to a relatively simple netlist I created to test out the library. Upon closer inspection, I was able to bypass the error by replacing the sort key by key=str.

Traceback:

Starting symbolic AC analysis...
Building symbolic MNA, N and x...  done.
Building equations...
Solving...
Success!
Results:
Traceback (most recent call last):
  File "/home/jsillman/.local/bin/ahkab", line 8, in <module>
    sys.exit(_cli())
  File "/home/jsillman/.local/lib/python3.10/site-packages/ahkab/__main__.py", line 155, in _cli
    ahkab.main(filename=remaning_args[0],
  File "/home/jsillman/.local/lib/python3.10/site-packages/ahkab/ahkab.py", line 953, in main
    results.update(run(circ, [an]))
  File "/home/jsillman/.local/lib/python3.10/site-packages/ahkab/ahkab.py", line 714, in run
    r = analysis[an_type](circ, **an_item)
  File "/home/jsillman/.local/lib/python3.10/site-packages/ahkab/symbolic.py", line 193, in symbolic_analysis
    printing.print_symbolic_results(sol)
  File "/home/jsillman/.local/lib/python3.10/site-packages/ahkab/printing.py", line 282, in print_symbolic_results
    keys.sort(lambda x, y: cmp(str(x), str(y)))
TypeError: sort() takes no positional arguments

After patching it in my local branch:

Starting symbolic AC analysis...
Building symbolic MNA, N and x...  done.
Building equations...
Solving...
Success!
Results:
I[V1]	 = (-GM_M1*R0_M1*V2 + GM_M1*R0_M1*V3 - V1 + V3)/(R0_M1 + RD)
I[V2]	 = 0.0
I[V3]	 = (GM_M1*R0_M1*RS*V2 - GM_M1*R0_M1*RS*V3 - R0_M1*V3 - RD*V3 + RS*V1 - RS*V3)/(RS*(R0_M1 + RD))
VGATE	 = V2
VIN	 = V3
VOUT	 = (-GM_M1*R0_M1*RD*V2 + GM_M1*R0_M1*RD*V3 + R0_M1*V1 + RD*V3)/(R0_M1 + RD)
VVDD	 = V1
Calculating small-signal symbolic transfer functions (V3))... done.
Small-signal symbolic transfer functions:
I[V1]/V3 = (GM_M1*R0_M1 + 1)/(R0_M1 + RD)
	DC: (GM_M1*R0_M1 + 1)/(R0_M1 + RD)
I[V2]/V3 = 0
	DC: 0
I[V3]/V3 = (-GM_M1*R0_M1*RS - R0_M1 - RD - RS)/(RS*(R0_M1 + RD))
	DC: (-GM_M1*R0_M1*RS - R0_M1 - RD - RS)/(RS*(R0_M1 + RD))
VGATE/V3 = 0
	DC: 0
VIN/V3 = 1
	DC: 1
VOUT/V3 = RD*(GM_M1*R0_M1 + 1)/(R0_M1 + RD)
	DC: RD*(GM_M1*R0_M1 + 1)/(R0_M1 + RD)
VVDD/V3 = 0
	DC: 0

A few details about my runtime:

• ahkab 0.18
• Python 3.10.12
• WSL 1.2.5.0
• Windows Version 10.0.19045 Build 19045

Let me know if there's any more information you need from me!