code: def testListFloatNegativeAndPositive(self):
      self.templatePackUnpack([1.1, -1.2, -1.3, -1.4, 1.5, -1.6])
  
imports: import unittest
  import numpy
  from pyclustering.core.pyclustering_package import package_builder, package_extractor
  from ctypes import c_ulong, c_size_t, c_double, c_uint, c_float, c_char_p
label_desc: Use image node_id 8 for calling the Test obj's underlying member method code with example usage: obj.testListFloatNegativeAndPositive() without return types