AttributeError: 'NoneType' object has no attribute 'get'

I'm unable to process my WireViz file. It's correctly formatted, but it fails with a strange error. To reproduce, save the harness.yaml file in the same directory that command will be run from, and then run wireviz harness.yaml

oskar@oskar-Inspiron-5577:~/SynologyDrive/3D/filamaker$ wireviz harness.yaml

WireViz 0.4.1
Input file:   harness.yaml
Output file:  harness.[html|png|svg|tsv]
Traceback (most recent call last):
  File "/home/oskar/.local/bin/wireviz", line 8, in <module>
    sys.exit(wireviz())
             ^^^^^^^^^
  File "/home/oskar/.local/share/pipx/venvs/wireviz/lib/python3.12/site-packages/click/core.py", line 1157, in __call__
    return self.main(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/oskar/.local/share/pipx/venvs/wireviz/lib/python3.12/site-packages/click/core.py", line 1078, in main
    rv = self.invoke(ctx)
         ^^^^^^^^^^^^^^^^
  File "/home/oskar/.local/share/pipx/venvs/wireviz/lib/python3.12/site-packages/click/core.py", line 1434, in invoke
    return ctx.invoke(self.callback, **ctx.params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/oskar/.local/share/pipx/venvs/wireviz/lib/python3.12/site-packages/click/core.py", line 783, in invoke
    return __callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/oskar/.local/share/pipx/venvs/wireviz/lib/python3.12/site-packages/wireviz/wv_cli.py", line 141, in wireviz
    wv.parse(
  File "/home/oskar/.local/share/pipx/venvs/wireviz/lib/python3.12/site-packages/wireviz/wireviz.py", line 140, in parse
    image = attribs.get("image")
            ^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'get'

And here's the harness.yaml file:

templates:
   - &CableMains
     category: bundle
     gauge: 0.5 mm2
     length: 1
     colors: [BN, BU, GN]
     show_equiv: true
   - &StepperCon
     type: Molex KK 254
     subtype: female
     pinlabels: [12V, 5V, EN, STEP, DIR, GND]
   - &I2C
     type: DuPont
     subtype: female
     pinlabels: [GND, VCC, SDA, SCL]
   - &CableI2C
     category: bundle
     gauge: 0.08 mm2
     length: 0.5
     colors: [RD, BK, GN, WH]
     show_equiv: true
   - &Encoder
     type: DuPont
     subtype: female
     pinlabels: [CLK, DT, SW, VCC, GND]
   - &Mains
     type: Ferrules
     subtype: male
     pinlabels: [L, N, PE]

connectors:
  BoardMains:
    type: Molex KK 254
    subtype: female
    pinlabels: [L, N, PE]
  BoardMains2:

  BoardPower:
    type: Molex KK 254
    subtype: female
    pinlabels: [12V, 5V, 3V3, GND]
  BoardThermistor:
    type: JST XH
    subtype: male
    pinlabels: [TH1, TH2]
  BoardStepper:
    <<: *StepperCon
  BoardLCD:
    <<: *I2C
  BoardCaliper:
    <<: *I2C
  BoardEncoder:
    <<: *Encoder
  MotorPower:
    type: Spade 6.3
    subtype: female
    pinlabels: [12V, GND]
  ToPSU:
    type: Soldered
    pinlabels: [L, N, PE, 12V, 5V, 3V3, GND]
  Heater:
    type: Spade
    pinlabels: [L, N, PE, TH1, TH2]
  Stepper:
    <<: *StepperCon
  LCD: 
    <<: *I2C
  Caliper:
    <<: *I2C
  Encoder:
    <<: *Encoder

cables:
  CableMotor:
    category: bundle
    gauge: 2.5 mm2
    length: 1
    colors: [RD, BK]
    show_equiv: true
  CableBoard:
    category: bundle
    gauge: 0.25 mm2
    length: 1
    colors: [YE, RD, OG, BK]
    show_equiv: true
  CableMainsIn:
    <<: *CableMains
  CableMainsHeater:
    <<: *CableMains
    length: 0.6
    colors: [BN, BU, GN, WH, WH]
  CableStepper:
    category: bundle
    gauge: 0.25 mm2
    length: 0.6
    colors: [YE, RD, GN, BU, WH, BK]
    show_equiv: true
  CableLCD:
    <<: *CableI2C
  CableCaliper:
    <<: *CableI2C
  CableEncoder:
    category: bundle
    gauge: 0.08 mm2
    length: 0.15
    colors: [WH, GN, BU, RD, BK]
    show_equiv: true
connections:
  -
    - ToPSU: [1-3]
    - CableMainsIn: [1-3]
    - BoardMains: [1-3]
  -
    - BoardMains2: [1-3]
    - CableMainsHeater: [1-3]
    - Heater: [1-3]
  -
    - BoardThermistor: [1, 2]
    - CableMainsHeater: [4, 5]
    - Heater: [4, 5]
  -
    - ToPSU: [4, 7]
    - CableMotor: [1, 2]
    - MotorPower: [1, 2]
  - 
    - ToPSU: [4-7]
    - CableBoard: [1-4]
    - BoardPower: [1-4]
  -
    - BoardStepper: [1-6]
    - CableStepper: [1-6]
    - Stepper: [1-4, 6, 5]
  - 
    - BoardLCD: [1-4]
    - CableLCD: [1-4]
    - LCD: [1-4]
  - 
    - BoardCaliper: [1-4]
    - CableCaliper: [1-4]
    - Caliper: [1-4]
  - 
    - BoardEncoder: [1-5]
    - CableEncoder: [1-5]
    - Encoder: [1-5]

@Monniasza wrote:

I'm unable to process my WireViz file. It's correctly formatted,

I'm afraid, your YAML input is not completely correct.

but it fails with a strange error. To reproduce, save the harness.yaml file in the same directory that command will be run from, and then run wireviz harness.yaml

oskar@oskar-Inspiron-5577:~/SynologyDrive/3D/filamaker$ wireviz harness.yaml

WireViz 0.4.1
Input file:   harness.yaml
Output file:  harness.[html|png|svg|tsv]
Traceback (most recent call last):
  [...]
  File "/home/oskar/.local/share/pipx/venvs/wireviz/lib/python3.12/site-packages/wireviz/wireviz.py", line 140, in parse
    image = attribs.get("image")
            ^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'get'

This exception tells me that one of your entries where an image attribute is allowed (connector or cable entry) is None instead of the expected dict type.

I admit that we should improve the explanation of such unexpected YAML input, and we discuss such improvements in #207.

And here's the harness.yaml file:

templates:
   - [...]
connectors:
  BoardMains:
    type: Molex KK 254
    subtype: female
    pinlabels: [L, N, PE]
  BoardMains2:

  BoardPower:
    [...]

Your BoardMains2 entry has no attributes and is therefore interpreted as None. If I add a pincount: 3 attribute to this entry, the YAML input is processed without any error.

connections:
  -
    - ToPSU: [1-3]
    - CableMainsIn: [1-3]
    - BoardMains: [1-3]
  -
    - BoardMains2: [1-3]

The BoardMains2 needs at least 3 pins for this connection to be legal.

wireviz / WireViz

AttributeError: 'NoneType' object has no attribute 'get' #426