code: def test_unicode_labels(Chart):
      chart = Chart()
      chart.add(
          "Série1",
          [
              {
                  "value": 1,
                  "xlink": "http://1/",
                  "label": eval("'Â°ĳæð©&×&<—×€¿_…'"),
              },
              {
                  "value": 2,
                  "xlink": {"href": "http://6.example.com/"},
                  "label": eval("'æÂ°€≠|€æÂ°€əæ'"),
              },
              {"value": 3, "label": eval("b'unicode <3'")},
          ],
      )
      if not chart._dual:
          chart.x_labels = eval(
              "['&œ', '¿?', '††††††††', 'unicode <3']"
          )
      chart.render_pyquery()
  
imports: import io
  import os
  import uuid
  import pytest
  import pygal
  from pygal.graph.map import BaseMap
  from pygal.test import make_data
  from pygal.util import cut
label_desc: Use image node_id 21 for calling a global function with example usage: test_unicode_labels(Chart) without return types