'''simple docstring'''

from typing import Any



class      UpperCAmelCase    :





       '''simple docstring'''



       def __init__(		self      ,  __lowerCAmelCase					)    ->    int:
        lowercase__							:       List[Any]										=   data
        lowercase__							:       Dict										=   None


       def __repr__(		self					)    ->    Union[str, Any]:
        return F"""Node({self.data})"""



class      UpperCAmelCase    :





       '''simple docstring'''



       def __init__(		self					)    ->    List[str]:
        lowercase__							:       List[Any]										=   None

       def __iter__(		self					)    ->    Optional[int]:
        lowercase__							:       List[str]										=   self.head
        while node:
         yield node.data
         lowercase__							:       int										=   node.next

       def __len__(		self					)    ->    Dict:
        return sum(1 for _ in self					)

       def __repr__(		self					)    ->    Dict:
        return "->".join([str(_snake_case					) for item in self]					)

       def __getitem__(		self      ,  __lowerCAmelCase					)    ->    Optional[int]:






        if not 0 <= index < len(self					):
         raise ValueError('''list index out of range.'''					)
        for i, node in enumerate(self					):
         if i == index:
          return node
        return None

       def __setitem__(		self      ,  __lowerCAmelCase      ,  __lowerCAmelCase					)    ->    Any:






        if not 0 <= index < len(self					):
         raise ValueError('''list index out of range.'''					)
        lowercase__							:       List[Any]										=   self.head
        for _ in range(_snake_case					):
         lowercase__							:       str										=   current.next
        lowercase__							:       Optional[Any]										=   data

       def _lowerCAmelCase(		self      ,  __lowerCAmelCase					)    ->    List[str]:
        self.insert_nth(len(self					)      ,  _snake_case					)

       def _lowerCAmelCase(		self      ,  __lowerCAmelCase					)    ->    List[Any]:
        self.insert_nth(0      ,  _snake_case					)

       def _lowerCAmelCase(		self      ,  __lowerCAmelCase      ,  __lowerCAmelCase					)    ->    Dict:






        if not 0 <= index <= len(self					):
         raise IndexError('''list index out of range'''					)
        lowercase__							:       Optional[int]										=   Node(_snake_case					)
        if self.head is None:
         lowercase__							:       Optional[Any]										=   new_node
        elif index == 0:
         lowercase__							:       int										=   self.head  # link new_node to head
         lowercase__							:       Any										=   new_node
        else:
         lowercase__							:       List[Any]										=   self.head
         for _ in range(index - 1					):
          lowercase__							:       Any										=   temp.next
         lowercase__							:       Tuple										=   temp.next
         lowercase__							:       str										=   new_node

       def _lowerCAmelCase(		self					)    ->    Optional[Any]:  # print every node data
        print(self					)

       def _lowerCAmelCase(		self					)    ->    Dict:
        return self.delete_nth(0					)

       def _lowerCAmelCase(		self					)    ->    str:  # delete from tail
        return self.delete_nth(len(self					) - 1					)

       def _lowerCAmelCase(		self      ,  __lowerCAmelCase = 0					)    ->    int:






        if not 0 <= index <= len(self					) - 1:  # test if index is valid
         raise IndexError('''List index out of range.'''					)
        lowercase__							:       int										=   self.head  # default first node
        if index == 0:
         lowercase__							:       Optional[int]										=   self.head.next
        else:
         lowercase__							:       Tuple										=   self.head
         for _ in range(index - 1					):
          lowercase__							:       Tuple										=   temp.next
         lowercase__							:       Optional[Any]										=   temp.next
         lowercase__							:       Union[str, Any]										=   temp.next.next
        return delete_node.data

       def _lowerCAmelCase(		self					)    ->    List[str]:
        return self.head is None


       def _lowerCAmelCase(		self					)    ->    str:
        lowercase__							:       Dict										=   None
        lowercase__							:       Tuple										=   self.head

        while current:
         # Store the current node's next node.
         lowercase__							:       List[Any]										=   current.next
         # Make the current node's next point backwards
         lowercase__							:       str										=   prev
         # Make the previous node be the current node
         lowercase__							:       Union[str, Any]										=   current
         # Make the current node the next node (to progress iteration)
         lowercase__							:       Tuple										=   next_node
        # Return prev in order to put the head at the end
        lowercase__							:       List[str]										=   prev


def      __UpperCamelCase			(  ):
 lowercase__							:       Optional[int]										=   LinkedList()
 assert linked_list.is_empty() is True
 assert str(_UpperCAmelCase	) == ""

 try:
  linked_list.delete_head()
  raise AssertionError  # This should not happen.
 except IndexError:
  assert True  # This should happen.

 try:
  linked_list.delete_tail()
  raise AssertionError  # This should not happen.
 except IndexError:
  assert True  # This should happen.

 for i in range(10	):
  assert len(_UpperCAmelCase	) == i
  linked_list.insert_nth(_UpperCAmelCase						,	i + 1	)
 assert str(_UpperCAmelCase	) == "->".join(str(_UpperCAmelCase	) for i in range(1						,	11	)	)

 linked_list.insert_head(0	)
 linked_list.insert_tail(11	)
 assert str(_UpperCAmelCase	) == "->".join(str(_UpperCAmelCase	) for i in range(0						,	12	)	)

 assert linked_list.delete_head() == 0
 assert linked_list.delete_nth(9	) == 10
 assert linked_list.delete_tail() == 11
 assert len(_UpperCAmelCase	) == 9
 assert str(_UpperCAmelCase	) == "->".join(str(_UpperCAmelCase	) for i in range(1						,	10	)	)

 assert all(linked_list[i] == i + 1 for i in range(0						,	9	)	) is True

 for i in range(0						,	9	):
  lowercase__							:       int										=   -i
 assert all(linked_list[i] == -i for i in range(0						,	9	)	) is True

 linked_list.reverse()
 assert str(_UpperCAmelCase	) == "->".join(str(_UpperCAmelCase	) for i in range(-8						,	1	)	)
def      __UpperCamelCase			(  ):
 lowercase__							:       int										=   [
     -9,
     100,
     Node(7734_5112	),
     '''dlrow olleH''',
     7,
     5555,
     0,
     -1_9_2.5_5_5_5_5,
     '''Hello, world!''',
     7_7.9,
     Node(10	),
     None,
     None,
     1_2.2_0,
 ]
 lowercase__							:       Any										=   LinkedList()

 for i in test_input:
  linked_list.insert_tail(_UpperCAmelCase	)

 # Check if it's empty or not
 assert linked_list.is_empty() is False
 assert (
     str(_UpperCAmelCase	) == "-9->100->Node(77345112)->dlrow olleH->7->5555->0->"
     "-192.55555->Hello, world!->77.9->Node(10)->None->None->12.2"
 )

 # Delete the head
 lowercase__							:       str										=   linked_list.delete_head()
 assert result == -9
 assert (
     str(_UpperCAmelCase	) == "100->Node(77345112)->dlrow olleH->7->5555->0->-192.55555->"
     "Hello, world!->77.9->Node(10)->None->None->12.2"
 )

 # Delete the tail
 lowercase__							:       List[str]										=   linked_list.delete_tail()
 assert result == 1_2.2
 assert (
     str(_UpperCAmelCase	) == "100->Node(77345112)->dlrow olleH->7->5555->0->-192.55555->"
     "Hello, world!->77.9->Node(10)->None->None"
 )

 # Delete a node in specific location in linked list
 lowercase__							:       Optional[int]										=   linked_list.delete_nth(10	)
 assert result is None
 assert (
     str(_UpperCAmelCase	) == "100->Node(77345112)->dlrow olleH->7->5555->0->-192.55555->"
     "Hello, world!->77.9->Node(10)->None"
 )

 # Add a Node instance to its head
 linked_list.insert_head(Node('''Hello again, world!'''	)	)
 assert (
     str(_UpperCAmelCase	)
     == "Node(Hello again, world!)->100->Node(77345112)->dlrow olleH->"
     "7->5555->0->-192.55555->Hello, world!->77.9->Node(10)->None"
 )

 # Add None to its tail
 linked_list.insert_tail(_UpperCAmelCase	)
 assert (
     str(_UpperCAmelCase	)
     == "Node(Hello again, world!)->100->Node(77345112)->dlrow olleH->"
     "7->5555->0->-192.55555->Hello, world!->77.9->Node(10)->None->None"
 )

 # Reverse the linked list
 linked_list.reverse()
 assert (
     str(_UpperCAmelCase	)
     == "None->None->Node(10)->77.9->Hello, world!->-192.55555->0->5555->"
     "7->dlrow olleH->Node(77345112)->100->Node(Hello again, world!)"
 )
def      __UpperCamelCase			(  ):
 from doctest import testmod

 testmod()

 lowercase__							:       int										=   LinkedList()
 linked_list.insert_head(input('''Inserting 1st at head '''	).strip()	)
 linked_list.insert_head(input('''Inserting 2nd at head '''	).strip()	)
 print('''\nPrint list:'''	)
 linked_list.print_list()
 linked_list.insert_tail(input('''\nInserting 1st at tail '''	).strip()	)
 linked_list.insert_tail(input('''Inserting 2nd at tail '''	).strip()	)
 print('''\nPrint list:'''	)
 linked_list.print_list()
 print('''\nDelete head'''	)
 linked_list.delete_head()
 print('''Delete tail'''	)
 linked_list.delete_tail()
 print('''\nPrint list:'''	)
 linked_list.print_list()
 print('''\nReverse linked list'''	)
 linked_list.reverse()
 print('''\nPrint list:'''	)
 linked_list.print_list()
 print('''\nString representation of linked list:'''	)
 print(_UpperCAmelCase	)
 print('''\nReading/changing Node data using indexing:'''	)
 print(F"""Element at Position 1: {linked_list[1]}"""	)
 lowercase__							:       Union[str, Any]										=   input('''Enter New Value: '''	).strip()
 print('''New list:'''	)
 print(_UpperCAmelCase	)
 print(F"""length of linked_list is : {len(_UpperCAmelCase	)}"""	)


if __name__ == "__main__":
  main()








"""simple docstring"""
import os
import tempfile
from functools import partial
from unittest import TestCase
from unittest.mock import patch

import numpy as np
import pytest

from datasets.arrow_dataset import Dataset
from datasets.search import ElasticSearchIndex, FaissIndex, MissingIndex

from .utils import require_elasticsearch, require_faiss


__UpperCamelCase     :						Optional[int]						       =  pytest.mark.integration







@require_faiss
class       a							(   a__  ):



 def    UpperCamelCase__  (     self     ):







  """simple docstring"""






  lowerCAmelCase    				= Dataset.from_dict({'filename': ['my_name-train' + '_' + str(_snake_case     ) for x in np.arange(30     ).tolist()]}     )
  return dset



 def    UpperCamelCase__  (     self     ):







  """simple docstring"""






  import faiss

  lowerCAmelCase    				= self._create_dummy_dataset()
  lowerCAmelCase    				= dset.map(
      lambda _snake_case				,       _snake_case     : {"vecs": i * np.ones(5				,       dtype=np.floataa     )}				,       with_indices=_snake_case				,       keep_in_memory=_snake_case     )
  lowerCAmelCase    				= dset.add_faiss_index('vecs'				,       batch_size=1_00				,       metric_type=faiss.METRIC_INNER_PRODUCT     )
  lowerCAmelCase				,lowerCAmelCase    				= dset.get_nearest_examples('vecs'				,       np.ones(5				,       dtype=np.floataa     )     )
  self.assertEqual(examples['filename'][0]				,       'my_name-train_29'     )
  dset.drop_index('vecs'     )



 def    UpperCamelCase__  (     self     ):







  """simple docstring"""






  import faiss

  lowerCAmelCase    				= self._create_dummy_dataset()
  dset.add_faiss_index_from_external_arrays(
      external_arrays=np.ones((30, 5)     ) * np.arange(30     ).reshape(-1				,       1     )				,       index_name='vecs'				,       batch_size=1_00				,       metric_type=faiss.METRIC_INNER_PRODUCT				,       )
  lowerCAmelCase				,lowerCAmelCase    				= dset.get_nearest_examples('vecs'				,       np.ones(5				,       dtype=np.floataa     )     )
  self.assertEqual(examples['filename'][0]				,       'my_name-train_29'     )



 def    UpperCamelCase__  (     self     ):







  """simple docstring"""






  import faiss

  lowerCAmelCase    				= self._create_dummy_dataset()
  dset.add_faiss_index_from_external_arrays(
      external_arrays=np.ones((30, 5)     ) * np.arange(30     ).reshape(-1				,       1     )				,       index_name='vecs'				,       metric_type=faiss.METRIC_INNER_PRODUCT				,       )

  # Setting delete=False and unlinking manually is not pretty... but it is required on Windows to
  # ensure somewhat stable behaviour. If we don't, we get PermissionErrors. This is an age-old issue.
  # see https://bugs.python.org/issue14243 and
  # https://stackoverflow.com/questions/23212435/permission-denied-to-write-to-my-temporary-file/23212515
  with tempfile.NamedTemporaryFile(delete=_snake_case     ) as tmp_file:
   dset.save_faiss_index('vecs'				,       tmp_file.name     )
   dset.load_faiss_index('vecs2'				,       tmp_file.name     )
  os.unlink(tmp_file.name     )

  lowerCAmelCase				,lowerCAmelCase    				= dset.get_nearest_examples('vecs2'				,       np.ones(5				,       dtype=np.floataa     )     )
  self.assertEqual(examples['filename'][0]				,       'my_name-train_29'     )



 def    UpperCamelCase__  (     self     ):







  """simple docstring"""






  lowerCAmelCase    				= self._create_dummy_dataset()
  dset.add_faiss_index_from_external_arrays(
      external_arrays=np.ones((30, 5)     ) * np.arange(30     ).reshape(-1				,       1     )				,       index_name='vecs'     )
  dset.drop_index('vecs'     )
  self.assertRaises(_snake_case				,       partial(dset.get_nearest_examples				,       'vecs2'				,       np.ones(5				,       dtype=np.floataa     )     )     )



 def    UpperCamelCase__  (     self     ):







  """simple docstring"""






  from elasticsearch import Elasticsearch

  lowerCAmelCase    				= self._create_dummy_dataset()
  with patch('elasticsearch.Elasticsearch.search'     ) as mocked_search, patch(
      'elasticsearch.client.IndicesClient.create'     ) as mocked_index_create, patch('elasticsearch.helpers.streaming_bulk'     ) as mocked_bulk:
   lowerCAmelCase    				= {'acknowledged': True}
   mocked_bulk.return_value([(True, None)] * 30     )
   lowerCAmelCase    				= {'hits': {'hits': [{'_score': 1, '_id': 29}]}}
   lowerCAmelCase    				= Elasticsearch()

   dset.add_elasticsearch_index('filename'				,       es_client=_snake_case     )
   lowerCAmelCase				,lowerCAmelCase    				= dset.get_nearest_examples('filename'				,       'my_name-train_29'     )
   self.assertEqual(examples['filename'][0]				,       'my_name-train_29'     )







@require_faiss
class       a							(   a__  ):



 def    UpperCamelCase__  (     self     ):







  """simple docstring"""






  import faiss

  lowerCAmelCase    				= FaissIndex(metric_type=faiss.METRIC_INNER_PRODUCT     )

  # add vectors
  index.add_vectors(np.eye(5				,       dtype=np.floataa     )     )
  self.assertIsNotNone(index.faiss_index     )
  self.assertEqual(index.faiss_index.ntotal				,       5     )
  index.add_vectors(np.zeros((5, 5)				,       dtype=np.floataa     )     )
  self.assertEqual(index.faiss_index.ntotal				,       10     )

  # single query
  lowerCAmelCase    				= np.zeros(5				,       dtype=np.floataa     )
  lowerCAmelCase    				= 1
  lowerCAmelCase				,lowerCAmelCase    				= index.search(_snake_case     )
  self.assertRaises(_snake_case				,       index.search				,       query.reshape(-1				,       1     )     )
  self.assertGreater(scores[0]				,       0     )
  self.assertEqual(indices[0]				,       1     )

  # batched queries
  lowerCAmelCase    				= np.eye(5				,       dtype=np.floataa     )[::-1]
  lowerCAmelCase				,lowerCAmelCase    				= index.search_batch(_snake_case     )
  self.assertRaises(_snake_case				,       index.search_batch				,       queries[0]     )
  lowerCAmelCase    				= [scores[0] for scores in total_scores]
  lowerCAmelCase    				= [indices[0] for indices in total_indices]
  self.assertGreater(np.min(_snake_case     )				,       0     )
  self.assertListEqual([4, 3, 2, 1, 0]				,       _snake_case     )



 def    UpperCamelCase__  (     self     ):







  """simple docstring"""






  import faiss

  lowerCAmelCase    				= FaissIndex(string_factory='Flat'     )
  index.add_vectors(np.eye(5				,       dtype=np.floataa     )     )
  self.assertIsInstance(index.faiss_index				,       faiss.IndexFlat     )
  lowerCAmelCase    				= FaissIndex(string_factory='LSH'     )
  index.add_vectors(np.eye(5				,       dtype=np.floataa     )     )
  self.assertIsInstance(index.faiss_index				,       faiss.IndexLSH     )
  with self.assertRaises(_snake_case     ):
   lowerCAmelCase    				= FaissIndex(string_factory='Flat'				,       custom_index=faiss.IndexFlat(5     )     )



 def    UpperCamelCase__  (     self     ):







  """simple docstring"""






  import faiss

  lowerCAmelCase    				= faiss.IndexFlat(5     )
  lowerCAmelCase    				= FaissIndex(custom_index=_snake_case     )
  index.add_vectors(np.eye(5				,       dtype=np.floataa     )     )
  self.assertIsInstance(index.faiss_index				,       faiss.IndexFlat     )



 def    UpperCamelCase__  (     self     ):







  """simple docstring"""






  import faiss

  lowerCAmelCase    				= FaissIndex(metric_type=faiss.METRIC_INNER_PRODUCT     )
  index.add_vectors(np.eye(5				,       dtype=np.floataa     )     )

  # Setting delete=False and unlinking manually is not pretty... but it is required on Windows to
  # ensure somewhat stable behaviour. If we don't, we get PermissionErrors. This is an age-old issue.
  # see https://bugs.python.org/issue14243 and
  # https://stackoverflow.com/questions/23212435/permission-denied-to-write-to-my-temporary-file/23212515
  with tempfile.NamedTemporaryFile(delete=_snake_case     ) as tmp_file:
   index.save(tmp_file.name     )
   lowerCAmelCase    				= FaissIndex.load(tmp_file.name     )
  os.unlink(tmp_file.name     )

  lowerCAmelCase    				= np.zeros(5				,       dtype=np.floataa     )
  lowerCAmelCase    				= 1
  lowerCAmelCase				,lowerCAmelCase    				= index.search(_snake_case     )
  self.assertGreater(scores[0]				,       0     )
  self.assertEqual(indices[0]				,       1     )


@require_faiss
def 		_SCREAMING_SNAKE_CASE			(_UpperCAmelCase					:    Dict			):
 import faiss

 lowerCAmelCase    				= FaissIndex(metric_type=faiss.METRIC_INNER_PRODUCT			)
 index.add_vectors(np.eye(5  ,     dtype=np.floataa			)			)

 lowerCAmelCase    				= 'index.faiss'
 lowerCAmelCase    				= F'mock://{index_name}'
 index.save(_UpperCAmelCase  ,     storage_options=mockfs.storage_options			)
 lowerCAmelCase    				= FaissIndex.load(_UpperCAmelCase  ,     storage_options=mockfs.storage_options			)

 lowerCAmelCase    				= np.zeros(5  ,     dtype=np.floataa			)
 lowerCAmelCase    				= 1
 lowerCAmelCase				,lowerCAmelCase    				= index.search(_UpperCAmelCase			)
 assert scores[0] > 0
 assert indices[0] == 1







@require_elasticsearch
class       a							(   a__  ):



 def    UpperCamelCase__  (     self     ):







  """simple docstring"""






  from elasticsearch import Elasticsearch

  with patch('elasticsearch.Elasticsearch.search'     ) as mocked_search, patch(
      'elasticsearch.client.IndicesClient.create'     ) as mocked_index_create, patch('elasticsearch.helpers.streaming_bulk'     ) as mocked_bulk:
   lowerCAmelCase    				= Elasticsearch()
   lowerCAmelCase    				= {'acknowledged': True}
   lowerCAmelCase    				= ElasticSearchIndex(es_client=_snake_case     )
   mocked_bulk.return_value([(True, None)] * 3     )
   index.add_documents(['foo', 'bar', 'foobar']     )

   # single query
   lowerCAmelCase    				= 'foo'
   lowerCAmelCase    				= {'hits': {'hits': [{'_score': 1, '_id': 0}]}}
   lowerCAmelCase				,lowerCAmelCase    				= index.search(_snake_case     )
   self.assertEqual(scores[0]				,       1     )
   self.assertEqual(indices[0]				,       0     )

   # single query with timeout
   lowerCAmelCase    				= 'foo'
   lowerCAmelCase    				= {'hits': {'hits': [{'_score': 1, '_id': 0}]}}
   lowerCAmelCase				,lowerCAmelCase    				= index.search(_snake_case				,       request_timeout=30     )
   self.assertEqual(scores[0]				,       1     )
   self.assertEqual(indices[0]				,       0     )

   # batched queries
   lowerCAmelCase    				= ['foo', 'bar', 'foobar']
   lowerCAmelCase    				= {'hits': {'hits': [{'_score': 1, '_id': 1}]}}
   lowerCAmelCase				,lowerCAmelCase    				= index.search_batch(_snake_case     )
   lowerCAmelCase    				= [scores[0] for scores in total_scores]
   lowerCAmelCase    				= [indices[0] for indices in total_indices]
   self.assertGreater(np.min(_snake_case     )				,       0     )
   self.assertListEqual([1, 1, 1]				,       _snake_case     )

   # batched queries with timeout
   lowerCAmelCase    				= ['foo', 'bar', 'foobar']
   lowerCAmelCase    				= {'hits': {'hits': [{'_score': 1, '_id': 1}]}}
   lowerCAmelCase				,lowerCAmelCase    				= index.search_batch(_snake_case				,       request_timeout=30     )
   lowerCAmelCase    				= [scores[0] for scores in total_scores]
   lowerCAmelCase    				= [indices[0] for indices in total_indices]
   self.assertGreater(np.min(_snake_case     )				,       0     )
   self.assertListEqual([1, 1, 1]				,       _snake_case     )





