code: def test_different_paths(self, dtype):
      # Test originally added to cover broken float16 path: gh-20305
      # Likely most are covered elsewhere, at least partially.
      dtype = np.dtype(dtype)
      # Simple test, designed to exercise most specialized code paths,
      # note the +0.5 for floats.  This makes sure we use a float value
      # where the results must be exact.
      arr = (np.arange(7) + 0.5).astype(dtype)
      scalar = np.array(2, dtype=dtype)
  
      # contig -> scalar:
      res = np.einsum("i->", arr)
      assert res == arr.sum()
      # contig, contig -> contig:
      res = np.einsum("i,i->i", arr, arr)
      assert_array_equal(res, arr * arr)
      # noncontig, noncontig -> contig:
      res = np.einsum("i,i->i", arr.repeat(2)[::2], arr.repeat(2)[::2])
      assert_array_equal(res, arr * arr)
      # contig + contig -> scalar
      assert np.einsum("i,i->", arr, arr) == (arr * arr).sum()
      # contig + scalar -> contig (with out)
      out = np.ones(7, dtype=dtype)
      res = np.einsum("i,->i", arr, dtype.type(2), out=out)
      assert_array_equal(res, arr * dtype.type(2))
      # scalar + contig -> contig (with out)
      res = np.einsum(",i->i", scalar, arr)
      assert_array_equal(res, arr * dtype.type(2))
      # scalar + contig -> scalar
      res = np.einsum(",i->", scalar, arr)
      # Use einsum to compare to not have difference due to sum round-offs:
      assert res == np.einsum("i->", scalar * arr)
      # contig + scalar -> scalar
      res = np.einsum("i,->", arr, scalar)
      # Use einsum to compare to not have difference due to sum round-offs:
      assert res == np.einsum("i->", scalar * arr)
      # contig + contig + contig -> scalar
      arr = np.array([0.5, 0.5, 0.25, 4.5, 3.0], dtype=dtype)
      res = np.einsum("i,i,i->", arr, arr, arr)
      assert_array_equal(res, (arr * arr * arr).sum())
      # four arrays:
      res = np.einsum("i,i,i,i->", arr, arr, arr, arr)
      assert_array_equal(res, (arr * arr * arr * arr).sum())
  
imports: import itertools
  import sys
  import platform
  import pytest
  import numpy
  from numpy.testing import assert_, assert_equal, assert_array_equal, assert_almost_equal, assert_raises, suppress_warnings, assert_raises_regex, assert_allclose
label_desc: Use image node_id 29 for calling the TestEinsum obj's underlying member method code with example usage: obj.test_different_paths(dtype) without return types