code: def test_MulticlassProbabilitiesLabel():
      n = 4
      model = vowpalwabbit.Workspace(
          loss_function="logistic",
          oaa=n,
          probabilities=True,
          quiet=True,
      )
      ex = model.example("1 | a b c d", 2)
      model.learn(ex)
      mpl = vowpalwabbit.MulticlassProbabilitiesLabel.from_example(ex)
      assert str(mpl) == "1:0.25 2:0.25 3:0.25 4:0.25"
      mpl = vowpalwabbit.MulticlassProbabilitiesLabel([0.4, 0.3, 0.3])
      assert str(mpl) == "1:0.4 2:0.3 3:0.3"
  
imports: import os
  from pathlib import Path
  import vowpalwabbit
  from vowpalwabbit import Workspace
  import pytest
  import warnings
  import filecmp
label_desc: Use image node_id 14 for calling a global function with example usage: test_MulticlassProbabilitiesLabel() without return types