code: def setUp(self):
      self.point = Point(1, 1)
      self.line1 = LineString([(0, 0), (2, 0)])
      self.line2 = LineString([(3, 0), (3, 6), (4.5, 6)])
      self.line3 = LineString((0, i) for i in range(5))
  
imports: import json
  import unittest
  import pytest
  from shapely.errors import GeometryTypeError
  from shapely.geometry import LineString, Point, shape
  from shapely.ops import substring
label_desc: Use image node_id 1 for calling the SubstringTestCase obj's underlying member method code with example usage: obj.setUp() without return types