


def   _SCREAMING_SNAKE_CASE	( SCREAMING_SNAKE_CASE       ):
  if not head:
    return True
  # split the list to two parts
  A_     ,       A_      :				List[str]		     =					head.next, head
  while fast and fast.next:
    A_      :				List[Any]		     =					fast.next.next
    A_      :				Optional[int]		     =					slow.next
  A_      :				Dict		     =					slow.next
  A_      :				List[str]		     =					None  # Don't forget here! But forget still works!
  # reverse the second part
  A_      :				Union[str, Any]		     =					None
  while second:
    A_      :				str		     =					second.next
    A_      :				Tuple		     =					node
    A_      :				List[Any]		     =					second
    A_      :				Optional[int]		     =					nxt
  # compare two parts
  # second part has the same or one less node
  while node:
    if node.val != head.val:
      return False
    A_      :				Tuple		     =					node.next
    A_      :				Union[str, Any]		     =					head.next
  return True


def   _SCREAMING_SNAKE_CASE	( SCREAMING_SNAKE_CASE       ):
  if not head or not head.next:
    return True

  # 1. Get the midpoint (slow)
  A_      :				Union[str, Any]		     =					head
  while fast and fast.next:
    A_     ,       A_      :				Dict		     =					fast.next.next, slow.next

  # 2. Push the second half into the stack
  A_      :				Dict		     =					[slow.val]
  while slow.next:
    A_      :				Optional[Any]		     =					slow.next
    stack.append(slow.val       )

  # 3. Comparison
  while stack:
    if stack.pop() != cur.val:
      return False
    A_      :				Optional[int]		     =					cur.next

  return True







def   _SCREAMING_SNAKE_CASE	( SCREAMING_SNAKE_CASE       ):
  if not head or not head.next:
    return True
  A_      :				List[Any]		     =					{}
  A_      :				str		     =					0
  while head:
    if head.val in d:
      d[head.val].append(SCREAMING_SNAKE_CASE       )
    else:
      A_      :				Any		     =					[pos]
    A_      :				Dict		     =					head.next
    pos += 1
  A_      :				Union[str, Any]		     =					pos - 1
  A_      :				Dict		     =					0
  for v in d.values():
    if len(SCREAMING_SNAKE_CASE       ) % 2 != 0:
      middle += 1
    else:
      A_      :				Dict		     =					0
      for i in range(0 ,			len(SCREAMING_SNAKE_CASE       )       ):
        if v[i] + v[len(SCREAMING_SNAKE_CASE       ) - 1 - step] != checksum:
          return False
        step += 1
    if middle > 1:
      return False
  return True








import unittest

import numpy as np

from transformers import is_flax_available
from transformers.testing_utils import require_flax

from ..test_modeling_flax_common import ids_tensor


if is_flax_available():
     import jax
     import jax.numpy as jnp

     from transformers.generation import (
         FlaxForcedBOSTokenLogitsProcessor,
         FlaxForcedEOSTokenLogitsProcessor,
         FlaxLogitsProcessorList,
         FlaxMinLengthLogitsProcessor,
         FlaxTemperatureLogitsWarper,
         FlaxTopKLogitsWarper,
         FlaxTopPLogitsWarper,
     )






@require_flax
class   _lowerCamelCase (					unittest.TestCase			):




       """simple docstring"""



       def        _snake_case       (      self				,       _SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE		)->List[Any]:




         '''simple docstring'''





         A_      :				Optional[int]		     =					jnp.ones((batch_size, length)		) / length
         return scores



       def        _snake_case       (      self		)->Tuple:




         '''simple docstring'''





         A_      :				Union[str, Any]		     =					None
         A_      :				Any		     =					20

         A_      :				Any		     =					self._get_uniform_logits(batch_size=2				,       length=_SCREAMING_SNAKE_CASE		)

         # tweak scores to not be uniform anymore
         A_      :				Dict		     =					scores.at[1, 5].set((1 / length) + 0.1		)  # peak, 1st batch
         A_      :				Tuple		     =					scores.at[1, 10].set((1 / length) - 0.4		)  # valley, 1st batch

         # compute softmax
         A_      :				List[str]		     =					jax.nn.softmax(_SCREAMING_SNAKE_CASE				,       axis=-1		)

         A_      :				Any		     =					FlaxTemperatureLogitsWarper(temperature=0.5		)
         A_      :				Optional[int]		     =					FlaxTemperatureLogitsWarper(temperature=1.3		)

         A_      :				Optional[Any]		     =					jax.nn.softmax(temp_dist_warper_sharper(_SCREAMING_SNAKE_CASE				,       scores.copy()				,       cur_len=_SCREAMING_SNAKE_CASE		)				,       axis=-1		)
         A_      :				List[Any]		     =					jax.nn.softmax(temp_dist_warper_smoother(_SCREAMING_SNAKE_CASE				,       scores.copy()				,       cur_len=_SCREAMING_SNAKE_CASE		)				,       axis=-1		)

         # uniform distribution stays uniform
         self.assertTrue(jnp.allclose(probs[0, :]				,       warped_prob_sharp[0, :]				,       atol=1e-3		)		)
         self.assertTrue(jnp.allclose(probs[0, :]				,       warped_prob_smooth[0, :]				,       atol=1e-3		)		)

         # sharp peaks get higher, valleys get lower
         self.assertLess(probs[1, :].max()				,       warped_prob_sharp[1, :].max()		)
         self.assertGreater(probs[1, :].min()				,       warped_prob_sharp[1, :].min()		)

         # smooth peaks get lower, valleys get higher
         self.assertGreater(probs[1, :].max()				,       warped_prob_smooth[1, :].max()		)
         self.assertLess(probs[1, :].min()				,       warped_prob_smooth[1, :].min()		)



       def        _snake_case       (      self		)->List[Any]:




         '''simple docstring'''





         A_      :				Any		     =					None
         A_      :				List[Any]		     =					10
         A_      :				str		     =					2

         # create ramp distribution
         A_      :				Any		     =					np.broadcast_to(np.arange(_SCREAMING_SNAKE_CASE		)[None, :]				,       (batch_size, vocab_size)		).copy()
         A_      :				List[Any]		     =					ramp_logits[1:, : vocab_size // 2] + vocab_size

         A_      :				Any		     =					FlaxTopKLogitsWarper(3		)

         A_      :				Tuple		     =					top_k_warp(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)

         # check that correct tokens are filtered
         self.assertListEqual(jnp.isinf(scores[0]		).tolist()				,       7 * [True] + 3 * [False]		)
         self.assertListEqual(jnp.isinf(scores[1]		).tolist()				,       2 * [True] + 3 * [False] + 5 * [True]		)

         # check special case
         A_      :				Optional[int]		     =					5
         A_      :				List[Any]		     =					FlaxTopKLogitsWarper(top_k=1				,       filter_value=0.0				,       min_tokens_to_keep=3		)

         A_      :				Optional[Any]		     =					np.broadcast_to(np.arange(_SCREAMING_SNAKE_CASE		)[None, :]				,       (batch_size, length)		).copy()
         A_      :				Dict		     =					top_k_warp_safety_check(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)

         # min_tokens overwrites k: 3 tokens are kept => 2 tokens are nullified
         self.assertListEqual((scores == 0.0).sum(axis=-1		).tolist()				,       [2, 2]		)



       def        _snake_case       (      self		)->Any:




         '''simple docstring'''





         A_      :				str		     =					None
         A_      :				Optional[Any]		     =					10
         A_      :				Any		     =					2

         # create distribution and take log (inverse to Softmax as taken in TopPLogitsWarper)
         A_      :				Optional[int]		     =					np.log(np.array([[0.3, 0.1, 0.1, 0.5], [0.1_5, 0.3, 0.3, 0.2_5]]		)		)

         A_      :				str		     =					FlaxTopPLogitsWarper(0.8		)
         A_      :				Optional[int]		     =					np.exp(top_p_warp(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)		)

         # dist should be filtered to keep min num values so that sum is >= top_p
         # exp (-inf) => 0
         A_      :				Tuple		     =					np.array([[0.3, 0.0, 0.0, 0.5], [0.0, 0.3, 0.3, 0.2_5]]		)
         self.assertTrue(np.allclose(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       atol=1e-3		)		)

         # check edge cases with negative and extreme logits
         A_      :				Union[str, Any]		     =					np.broadcast_to(np.arange(_SCREAMING_SNAKE_CASE		)[None, :]				,       (batch_size, vocab_size)		).copy() - (
             vocab_size // 2
         )

         # make ramp_logits more extreme
         A_      :				str		     =					ramp_logits[1] * 1_0_0.0

         # make sure at least 2 tokens are kept
         A_      :				str		     =					FlaxTopPLogitsWarper(0.9				,       min_tokens_to_keep=2				,       filter_value=0.0		)
         A_      :				str		     =					top_p_warp(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)

         # first batch should keep three tokens, second batch would keep only 1, but due to `min_tokens_to_keep=2` keeps 2.
         self.assertListEqual((filtered_dist != 0.0).sum(axis=-1		).tolist()				,       [3, 2]		)



       def        _snake_case       (      self		)->Any:




         '''simple docstring'''





         A_      :				str		     =					20
         A_      :				Union[str, Any]		     =					4
         A_      :				Optional[Any]		     =					0

         A_      :				Union[str, Any]		     =					FlaxMinLengthLogitsProcessor(min_length=10				,       eos_token_id=_SCREAMING_SNAKE_CASE		)

         # check that min length is applied at length 5
         A_      :				int		     =					ids_tensor((batch_size, 20)				,       vocab_size=20		)
         A_      :				List[Any]		     =					5
         A_      :				Optional[int]		     =					self._get_uniform_logits(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE		)
         A_      :				Optional[int]		     =					min_dist_processor(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)
         self.assertListEqual(scores_before_min_length[:, eos_token_id].tolist()				,       4 * [-float('''inf'''		)]		)

         # check that min length is not applied anymore at length 15
         A_      :				Tuple		     =					self._get_uniform_logits(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE		)
         A_      :				Any		     =					15
         A_      :				int		     =					min_dist_processor(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)
         self.assertFalse(jnp.isinf(_SCREAMING_SNAKE_CASE		).any()		)



       def        _snake_case       (      self		)->Optional[Any]:




         '''simple docstring'''





         A_      :				Optional[int]		     =					20
         A_      :				Optional[int]		     =					4
         A_      :				Optional[int]		     =					0

         A_      :				Optional[Any]		     =					FlaxForcedBOSTokenLogitsProcessor(bos_token_id=_SCREAMING_SNAKE_CASE		)

         # check that all scores are -inf except the bos_token_id score
         A_      :				Optional[Any]		     =					ids_tensor((batch_size, 1)				,       vocab_size=20		)
         A_      :				str		     =					1
         A_      :				List[str]		     =					self._get_uniform_logits(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE		)
         A_      :				List[str]		     =					logits_processor(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)
         self.assertTrue(jnp.isneginf(scores[:, bos_token_id + 1 :]		).all()		)
         self.assertListEqual(scores[:, bos_token_id].tolist()				,       4 * [0]		)  # score for bos_token_id shold be zero

         # check that bos_token_id is not forced if current length is greater than 1
         A_      :				Optional[int]		     =					3
         A_      :				List[Any]		     =					self._get_uniform_logits(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE		)
         A_      :				Tuple		     =					logits_processor(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)
         self.assertFalse(jnp.isinf(_SCREAMING_SNAKE_CASE		).any()		)



       def        _snake_case       (      self		)->List[str]:




         '''simple docstring'''





         A_      :				Union[str, Any]		     =					20
         A_      :				str		     =					4
         A_      :				Dict		     =					0
         A_      :				Optional[int]		     =					5

         A_      :				Tuple		     =					FlaxForcedEOSTokenLogitsProcessor(max_length=_SCREAMING_SNAKE_CASE				,       eos_token_id=_SCREAMING_SNAKE_CASE		)

         # check that all scores are -inf except the eos_token_id when max_length is reached
         A_      :				List[Any]		     =					ids_tensor((batch_size, 4)				,       vocab_size=20		)
         A_      :				Any		     =					4
         A_      :				Optional[Any]		     =					self._get_uniform_logits(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE		)
         A_      :				List[Any]		     =					logits_processor(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)
         self.assertTrue(jnp.isneginf(scores[:, eos_token_id + 1 :]		).all()		)
         self.assertListEqual(scores[:, eos_token_id].tolist()				,       4 * [0]		)  # score for eos_token_id should be zero

         # check that eos_token_id is not forced if max_length is not reached
         A_      :				int		     =					3
         A_      :				Union[str, Any]		     =					self._get_uniform_logits(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE		)
         A_      :				Dict		     =					logits_processor(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)
         self.assertFalse(jnp.isinf(_SCREAMING_SNAKE_CASE		).any()		)



       def        _snake_case       (      self		)->str:




         '''simple docstring'''





         A_      :				str		     =					4
         A_      :				Dict		     =					10
         A_      :				Union[str, Any]		     =					15
         A_      :				str		     =					2
         A_      :				int		     =					1
         A_      :				List[str]		     =					15

         # dummy input_ids and scores
         A_      :				Tuple		     =					ids_tensor((batch_size, sequence_length)				,       _SCREAMING_SNAKE_CASE		)
         A_      :				int		     =					input_ids.copy()

         A_      :				List[Any]		     =					self._get_uniform_logits(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE		)
         A_      :				Union[str, Any]		     =					scores.copy()

         # instantiate all dist processors
         A_      :				Dict		     =					FlaxTemperatureLogitsWarper(temperature=0.5		)
         A_      :				Any		     =					FlaxTopKLogitsWarper(3		)
         A_      :				List[Any]		     =					FlaxTopPLogitsWarper(0.8		)

         # instantiate all logits processors
         A_      :				List[Any]		     =					FlaxMinLengthLogitsProcessor(min_length=10				,       eos_token_id=_SCREAMING_SNAKE_CASE		)
         A_      :				Optional[int]		     =					FlaxForcedBOSTokenLogitsProcessor(bos_token_id=_SCREAMING_SNAKE_CASE		)
         A_      :				Dict		     =					FlaxForcedEOSTokenLogitsProcessor(max_length=_SCREAMING_SNAKE_CASE				,       eos_token_id=_SCREAMING_SNAKE_CASE		)

         A_      :				Union[str, Any]		     =					10

         # no processor list
         A_      :				int		     =					temp_dist_warp(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)
         A_      :				List[str]		     =					top_k_warp(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)
         A_      :				Any		     =					top_p_warp(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)
         A_      :				Dict		     =					min_dist_proc(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)
         A_      :				Optional[int]		     =					bos_dist_proc(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)
         A_      :				Optional[Any]		     =					eos_dist_proc(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)

         # with processor list
         A_      :				Any		     =					FlaxLogitsProcessorList(
             [temp_dist_warp, top_k_warp, top_p_warp, min_dist_proc, bos_dist_proc, eos_dist_proc]		)
         A_      :				List[str]		     =					processor(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)

         # scores should be equal
         self.assertTrue(jnp.allclose(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       atol=1e-3		)		)

         # input_ids should never be changed
         self.assertListEqual(input_ids.tolist()				,       input_ids_comp.tolist()		)







       def        _snake_case       (      self		)->Dict:




         '''simple docstring'''





         A_      :				str		     =					4
         A_      :				Dict		     =					10
         A_      :				Tuple		     =					15
         A_      :				List[str]		     =					2
         A_      :				List[str]		     =					1
         A_      :				Union[str, Any]		     =					15

         # dummy input_ids and scores
         A_      :				Any		     =					ids_tensor((batch_size, sequence_length)				,       _SCREAMING_SNAKE_CASE		)
         A_      :				Union[str, Any]		     =					input_ids.copy()

         A_      :				Optional[Any]		     =					self._get_uniform_logits(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE		)
         A_      :				Tuple		     =					scores.copy()

         # instantiate all dist processors
         A_      :				List[str]		     =					FlaxTemperatureLogitsWarper(temperature=0.5		)
         A_      :				Optional[Any]		     =					FlaxTopKLogitsWarper(3		)
         A_      :				int		     =					FlaxTopPLogitsWarper(0.8		)

         # instantiate all logits processors
         A_      :				List[Any]		     =					FlaxMinLengthLogitsProcessor(min_length=10				,       eos_token_id=_SCREAMING_SNAKE_CASE		)
         A_      :				Dict		     =					FlaxForcedBOSTokenLogitsProcessor(bos_token_id=_SCREAMING_SNAKE_CASE		)
         A_      :				Optional[Any]		     =					FlaxForcedEOSTokenLogitsProcessor(max_length=_SCREAMING_SNAKE_CASE				,       eos_token_id=_SCREAMING_SNAKE_CASE		)

         A_      :				str		     =					10

         # no processor list
         def run_no_processor_list(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE		):
           A_      :				int		     =					temp_dist_warp(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)
           A_      :				Optional[Any]		     =					top_k_warp(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)
           A_      :				List[Any]		     =					top_p_warp(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)
           A_      :				Dict		     =					min_dist_proc(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)
           A_      :				Any		     =					bos_dist_proc(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)
           A_      :				Optional[Any]		     =					eos_dist_proc(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)
           return scores

         # with processor list
         def run_processor_list(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE		):
           A_      :				Optional[int]		     =					FlaxLogitsProcessorList(
               [temp_dist_warp, top_k_warp, top_p_warp, min_dist_proc, bos_dist_proc, eos_dist_proc]		)
           A_      :				Optional[int]		     =					processor(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       cur_len=_SCREAMING_SNAKE_CASE		)
           return scores

         A_      :				Optional[int]		     =					jax.jit(_SCREAMING_SNAKE_CASE		)
         A_      :				Union[str, Any]		     =					jax.jit(_SCREAMING_SNAKE_CASE		)

         A_      :				Dict		     =					jitted_run_no_processor_list(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE		)
         A_      :				List[Any]		     =					jitted_run_processor_list(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE		)

         # scores should be equal
         self.assertTrue(jnp.allclose(_SCREAMING_SNAKE_CASE				,       _SCREAMING_SNAKE_CASE				,       atol=1e-3		)		)

         # input_ids should never be changed
         self.assertListEqual(input_ids.tolist()				,       input_ids_comp.tolist()		)




