code: def test_early_exaggeration_used():
      # check that the ``early_exaggeration`` parameter has an effect
      random_state = check_random_state(0)
      n_components = 2
      methods = ["exact", "barnes_hut"]
      X = random_state.randn(25, n_components).astype(np.float32)
      for method in methods:
          tsne = TSNE(
              n_components=n_components,
              perplexity=1,
              learning_rate=100.0,
              init="pca",
              random_state=0,
              method=method,
              early_exaggeration=1.0,
              n_iter=250,
          )
          X_embedded1 = tsne.fit_transform(X)
          tsne = TSNE(
              n_components=n_components,
              perplexity=1,
              learning_rate=100.0,
              init="pca",
              random_state=0,
              method=method,
              early_exaggeration=10.0,
              n_iter=250,
          )
          X_embedded2 = tsne.fit_transform(X)
  
          assert not np.allclose(X_embedded1, X_embedded2)
  
imports: import sys
  from io import StringIO
  import numpy
  import pytest
  import scipy.sparse
  from numpy.testing import assert_allclose
  from scipy.optimize import check_grad
  from scipy.spatial.distance import pdist, squareform
  from sklearn import config_context
  from sklearn.datasets import make_blobs
  from sklearn.exceptions import EfficiencyWarning
  from sklearn.manifold import TSNE, _barnes_hut_tsne
  from sklearn.manifold._t_sne import _gradient_descent, _joint_probabilities, _joint_probabilities_nn, _kl_divergence, _kl_divergence_bh, trustworthiness
  from sklearn.manifold._utils import _binary_search_perplexity
  from sklearn.metrics.pairwise import cosine_distances, manhattan_distances, pairwise_distances
  from sklearn.neighbors import NearestNeighbors, kneighbors_graph
  from sklearn.utils import check_random_state
  from sklearn.utils._testing import assert_almost_equal, assert_array_almost_equal, assert_array_equal, ignore_warnings, skip_if_32bit
  from sklearn.utils.fixes import CSR_CONTAINERS, LIL_CONTAINERS
label_desc: Use image node_id 24 for calling a global function with example usage: test_early_exaggeration_used() without return types