Units: Cannot use the same alias for multiple pins

Now this may be me not knowing python 😃

This code

part = Part('74xx', '74LS32')
part.make_unit('A', 1, 2, 3)
part.A.set_pin_alias('1A', 1)

gives this error

ERROR: Cannot use the same alias for multiple pins.

Looking at the Part.py source I think somehow my pin ‘1’ is interpreted as a list of pins. Not sure why.

Also I was surprised that the units were not already there, I can see them in the KiCad symbol editor? I call set_default_tool(KICAD) to make sure those are used…?

[xesscorp]

The newest modifications have been pushed. You can get them like this:

pip install -U https://github.com/xesscorp/skidl/archive/master.zip

Now when a part is read from a symbol library, the part units are automatically created with names like uA, uB, …

Python 2.7.16 (v2.7.16:413a49145e, Mar  4 2019, 01:30:55) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from skidl import *
>>> part = Part('74XX', '74LS32')
WARNING: Non-identical pins with the same number (1) in symbol drawing 74LS78
WARNING: Non-identical pins with the same number (5) in symbol drawing 74LS78
>>> part.unit    <= Print all the part units.
{u'uE':
 74LS32 (): Quad 2-input OR
    Pin U1/14/VCC/POWER-IN
    Pin U1/7/GND/POWER-IN, u'uD':
 74LS32 (): Quad 2-input OR
    Pin U1/13/~/INPUT
    Pin U1/11/~/OUTPUT
    Pin U1/12/~/INPUT, u'uA':
 74LS32 (): Quad 2-input OR
    Pin U1/2/~/INPUT
    Pin U1/1/~/INPUT
    Pin U1/3/~/OUTPUT, u'uC':
 74LS32 (): Quad 2-input OR
    Pin U1/9/~/INPUT
    Pin U1/8/~/OUTPUT
    Pin U1/10/~/INPUT, u'uB':
 74LS32 (): Quad 2-input OR
    Pin U1/6/~/OUTPUT
    Pin U1/5/~/INPUT
    Pin U1/4/~/INPUT}

For making pin aliases, just make an assignment to the .aliases member of a part or part unit. You can also assign multiple aliases to a pin by using the += operator.

>>> part.uA[1].aliases = '1A'
>>> part.uA['1A']
Pin U1/1/~,1A/INPUT     <= Pin 1 now has alias 1A.
>>> part.uA[1].aliases += 'A1'
>>> part.uA[1]
Pin U1/1/~,A1,1A/INPUT    <= Pin 1 now has aliases 1A and A1.

[xesscorp]

I’m getting ready to push it to Github. Once I do that, I’ll let you know how to install it. (It’s not ready for a full PyPi release.) This push will also enable automatic loading of part units when the symbol library is read, and it makes creating pin aliases a bit easier.