



'''simple docstring'''





from __future__ import annotations

from random import random
from typing import Generic, TypeVar

SCREAMING_SNAKE_CASE__      					=     TypeVar("KT")
SCREAMING_SNAKE_CASE__      					=     TypeVar("VT")


class 				snake_case (Generic[KT, VT]   ):



       def __init__(				self     ,UpperCAmelCase_ = "root"     ,UpperCAmelCase_ = None      )  ->							Optional[Any]:
           lowercase__		       =						key
           lowercase__		       =						value
           lowercase__		       =						[]



       def __repr__(				self      )  ->							Dict:
           return F'''Node({self.key}: {self.value})'''







       @property
       def 							_a      (				self      )  ->							int:
           return len(self.forward      )





class 				snake_case (Generic[KT, VT]   ):



       def __init__(				self     ,UpperCAmelCase_ = 0.5     ,UpperCAmelCase_ = 16      )  ->							Union[str, Any]:
           lowercase__		       =						Node[KT, VT]()
           lowercase__		       =						0
           lowercase__		       =						p
           lowercase__		       =						max_level



       def __str__(				self      )  ->							int:
           lowercase__		       =						list(self      )

           if len(lowerCAmelCase_      ) == 0:
               return F'''SkipList(level={self.level})'''

           lowercase__		       =						max((len(str(lowerCAmelCase_      )      ) for item in items)     ,default=4      )
           lowercase__		       =						max(lowerCAmelCase_     ,4      ) + 4

           lowercase__		       =						self.head
           lowercase__		       =						[]

           lowercase__		       =						node.forward.copy()
           lines.append(F'''[{node.key}]'''.ljust(lowerCAmelCase_     ,"-"      ) + "* " * len(lowerCAmelCase_      )      )
           lines.append(" " * label_size + "| " * len(lowerCAmelCase_      )      )

           while len(node.forward      ) != 0:
               lowercase__		       =						node.forward[0]

               lines.append(
                   F'''[{node.key}]'''.ljust(lowerCAmelCase_     ,"-"      )
                   + " ".join(str(n.key      ) if n.key == node.key else "|" for n in forwards      )      )
               lines.append(" " * label_size + "| " * len(lowerCAmelCase_      )      )
               lowercase__		       =						node.forward

           lines.append("None".ljust(lowerCAmelCase_      ) + "* " * len(lowerCAmelCase_      )      )
           return F'''SkipList(level={self.level})\n''' + "\n".join(lowerCAmelCase_      )



       def __iter__(				self      )  ->							List[str]:
           lowercase__		       =						self.head

           while len(node.forward      ) != 0:
               yield node.forward[0].key
               lowercase__		       =						node.forward[0]



       def 							_a      (				self      )  ->							Dict:
           lowercase__		       =						1
           while random() < self.p and level < self.max_level:
               level += 1

           return level



       def 							_a      (				self     ,UpperCAmelCase_      )  ->							Dict:
           lowercase__		       =						[]

           lowercase__		       =						self.head

           for i in reversed(range(self.level      )      ):
               # i < node.level - When node level is lesser than `i` decrement `i`.
               # node.forward[i].key < key - Jumping to node with key value higher
               #                             or equal to searched key would result
               #                             in skipping searched key.
               while i < node.level and node.forward[i].key < key:
                   lowercase__		       =						node.forward[i]
               # Each leftmost node (relative to searched node) will potentially have to
               # be updated.
               update_vector.append(lowerCAmelCase_      )

           update_vector.reverse()  # Note that we were inserting values in reverse order.

           # len(node.forward) != 0 - If current node doesn't contain any further
           #                          references then searched key is not present.
           # node.forward[0].key == key - Next node key should be equal to search key
           #                              if key is present.
           if len(node.forward      ) != 0 and node.forward[0].key == key:
               return node.forward[0], update_vector
           else:
               return None, update_vector



       def 							_a      (				self     ,UpperCAmelCase_      )  ->							List[Any]:
           lowercase__       ,       lowercase__		       =						self._locate_node(lowerCAmelCase_      )

           if node is not None:
               for i, update_node in enumerate(lowerCAmelCase_      ):
                   # Remove or replace all references to removed node.
                   if update_node.level > i and update_node.forward[i].key == key:
                       if node.level > i:
                           lowercase__		       =						node.forward[i]
                       else:
                           lowercase__		       =						update_node.forward[:i]



       def 							_a      (				self     ,UpperCAmelCase_     ,UpperCAmelCase_      )  ->							Optional[int]:
           lowercase__       ,       lowercase__		       =						self._locate_node(lowerCAmelCase_      )
           if node is not None:
               lowercase__		       =						value
           else:
               lowercase__		       =						self.random_level()

               if level > self.level:
                   # After level increase we have to add additional nodes to head.
                   for _ in range(self.level - 1     ,lowerCAmelCase_      ):
                       update_vector.append(self.head      )
                   lowercase__		       =						level

               lowercase__		       =						Node(lowerCAmelCase_     ,lowerCAmelCase_      )

               for i, update_node in enumerate(update_vector[:level]      ):
                   # Change references to pass through new node.
                   if update_node.level > i:
                       new_node.forward.append(update_node.forward[i]      )

                   if update_node.level < i + 1:
                       update_node.forward.append(lowerCAmelCase_      )
                   else:
                       lowercase__		       =						new_node







       def 							_a      (				self     ,UpperCAmelCase_      )  ->							List[str]:
           lowercase__       ,       lowercase__		       =						self._locate_node(lowerCAmelCase_      )

           if node is not None:
               return node.value

           return None





def        lowerCamelCase  (				):
    lowercase__		       =						SkipList()
    skip_list.insert("Key1"     ,3       )
    skip_list.insert("Key2"     ,12       )
    skip_list.insert("Key3"     ,41       )
    skip_list.insert("Key4"     ,-19       )

    lowercase__		       =						skip_list.head
    lowercase__		       =						{}
    while node.level != 0:
        lowercase__		       =						node.forward[0]
        lowercase__		       =						node.value

    assert len(__lowerCAmelCase       ) == 4
    assert all_values["Key1"] == 3
    assert all_values["Key2"] == 12
    assert all_values["Key3"] == 41
    assert all_values["Key4"] == -19




def        lowerCamelCase  (				):
    lowercase__		       =						SkipList()
    skip_list.insert("Key1"     ,10       )
    skip_list.insert("Key1"     ,12       )

    skip_list.insert("Key5"     ,7       )
    skip_list.insert("Key7"     ,10       )
    skip_list.insert("Key10"     ,5       )

    skip_list.insert("Key7"     ,7       )
    skip_list.insert("Key5"     ,5       )
    skip_list.insert("Key10"     ,10       )

    lowercase__		       =						skip_list.head
    lowercase__		       =						{}
    while node.level != 0:
        lowercase__		       =						node.forward[0]
        lowercase__		       =						node.value

    if len(__lowerCAmelCase       ) != 4:
        print()
    assert len(__lowerCAmelCase       ) == 4
    assert all_values["Key1"] == 12
    assert all_values["Key7"] == 7
    assert all_values["Key5"] == 5
    assert all_values["Key10"] == 10




def        lowerCamelCase  (				):
    lowercase__		       =						SkipList()
    assert skip_list.find("Some key"       ) is None




def        lowerCamelCase  (				):
    lowercase__		       =						SkipList()

    skip_list.insert("Key2"     ,20       )
    assert skip_list.find("Key2"       ) == 20

    skip_list.insert("Some Key"     ,10       )
    skip_list.insert("Key2"     ,8       )
    skip_list.insert("V"     ,13       )

    assert skip_list.find("Y"       ) is None
    assert skip_list.find("Key2"       ) == 8
    assert skip_list.find("Some Key"       ) == 10
    assert skip_list.find("V"       ) == 13




def        lowerCamelCase  (				):
    lowercase__		       =						SkipList()
    skip_list.delete("Some key"       )

    assert len(skip_list.head.forward       ) == 0




def        lowerCamelCase  (				):
    lowercase__		       =						SkipList()

    skip_list.insert("Key1"     ,12       )
    skip_list.insert("V"     ,13       )
    skip_list.insert("X"     ,14       )
    skip_list.insert("Key2"     ,15       )

    skip_list.delete("V"       )
    skip_list.delete("Key2"       )

    assert skip_list.find("V"       ) is None
    assert skip_list.find("Key2"       ) is None




def        lowerCamelCase  (				):
    lowercase__		       =						SkipList()

    skip_list.insert("Key1"     ,12       )
    skip_list.insert("V"     ,13       )
    skip_list.insert("X"     ,14       )
    skip_list.insert("Key2"     ,15       )

    skip_list.delete("V"       )
    assert skip_list.find("V"       ) is None
    assert skip_list.find("X"       ) == 14
    assert skip_list.find("Key1"       ) == 12
    assert skip_list.find("Key2"       ) == 15

    skip_list.delete("X"       )
    assert skip_list.find("V"       ) is None
    assert skip_list.find("X"       ) is None
    assert skip_list.find("Key1"       ) == 12
    assert skip_list.find("Key2"       ) == 15

    skip_list.delete("Key1"       )
    assert skip_list.find("V"       ) is None
    assert skip_list.find("X"       ) is None
    assert skip_list.find("Key1"       ) is None
    assert skip_list.find("Key2"       ) == 15

    skip_list.delete("Key2"       )
    assert skip_list.find("V"       ) is None
    assert skip_list.find("X"       ) is None
    assert skip_list.find("Key1"       ) is None
    assert skip_list.find("Key2"       ) is None




def        lowerCamelCase  (				):
    lowercase__		       =						SkipList()

    skip_list.insert("Key1"     ,12       )
    skip_list.insert("V"     ,13       )
    skip_list.insert("X"     ,142       )
    skip_list.insert("Key2"     ,15       )

    skip_list.delete("X"       )

    def traverse_keys(_snake_case  :						List[Any]       ):
        yield node.key
        for forward_node in node.forward:
            yield from traverse_keys(__lowerCAmelCase       )

    assert len(set(traverse_keys(skip_list.head       )       )       ) == 4




def        lowerCamelCase  (				):


    def is_sorted(_snake_case  :						str       ):
        return all(next_item >= item for item, next_item in zip(__lowerCAmelCase     ,lst[1:]       )       )

    lowercase__		       =						SkipList()
    for i in range(10       ):
        skip_list.insert(__lowerCAmelCase     ,__lowerCAmelCase       )
    assert is_sorted(list(__lowerCAmelCase       )       )
    skip_list.delete(5       )
    skip_list.delete(8       )
    skip_list.delete(2       )
    assert is_sorted(list(__lowerCAmelCase       )       )
    skip_list.insert(-12     ,-12       )
    skip_list.insert(77     ,77       )
    assert is_sorted(list(__lowerCAmelCase       )       )




def        lowerCamelCase  (				):


    for _ in range(100       ):
        # Repeat test 100 times due to the probabilistic nature of skip list
        # random values == random bugs
        test_insert()
        test_insert_overrides_existing_value()

        test_searching_empty_list_returns_none()
        test_search()

        test_deleting_item_from_empty_list_do_nothing()
        test_deleted_items_are_not_founded_by_find_method()
        test_delete_removes_only_given_key()
        test_delete_doesnt_leave_dead_nodes()

        test_iter_always_yields_sorted_values()




def        lowerCamelCase  (				):
    lowercase__		       =						SkipList()
    skip_list.insert(2     ,"2"       )
    skip_list.insert(4     ,"4"       )
    skip_list.insert(6     ,"4"       )
    skip_list.insert(4     ,"5"       )
    skip_list.insert(8     ,"4"       )
    skip_list.insert(9     ,"4"       )

    skip_list.delete(4       )

    print(__lowerCAmelCase       )


if __name__ == "__main__":
 import doctest

 doctest.testmod()
 main()









'''simple docstring'''





import os
from typing import Dict, List, Union

import tensorflow as tf
from keras_nlp.tokenizers import BytePairTokenizer
from tensorflow_text import pad_model_inputs

from .tokenization_gpta import GPTaTokenizer


class 				snake_case (tf.keras.layers.Layer   ):



       def __init__(				self     ,UpperCAmelCase_     ,UpperCAmelCase_     ,UpperCAmelCase_ = None     ,UpperCAmelCase_ = None      )  ->							List[Any]:
           super().__init__()
           lowercase__		       =						pad_token_id
           lowercase__		       =						max_length
           lowercase__		       =						vocab
           lowercase__		       =						merges
           lowercase__		       =						BytePairTokenizer(UpperCAmelCase_     ,UpperCAmelCase_     ,sequence_length=UpperCAmelCase_      )



       @classmethod
       def 							_a      (				cls     ,UpperCAmelCase_     ,*UpperCAmelCase_     ,**UpperCAmelCase_      )  ->							List[str]:
           lowercase__		       =						[" ".join(UpperCAmelCase_      ) for m in tokenizer.bpe_ranks.keys()]
           lowercase__		       =						tokenizer.get_vocab()
           return cls(UpperCAmelCase_     ,UpperCAmelCase_     ,*UpperCAmelCase_     ,**UpperCAmelCase_      )



       @classmethod
       def 							_a      (				cls     ,UpperCAmelCase_     ,*UpperCAmelCase_     ,**UpperCAmelCase_      )  ->							Optional[Any]:
           lowercase__		       =						GPTaTokenizer.from_pretrained(UpperCAmelCase_     ,*UpperCAmelCase_     ,**UpperCAmelCase_      )
           return cls.from_tokenizer(UpperCAmelCase_     ,*UpperCAmelCase_     ,**UpperCAmelCase_      )



       @classmethod
       def 							_a      (				cls     ,UpperCAmelCase_      )  ->							Optional[Any]:
           return cls(**UpperCAmelCase_      )



       def 							_a      (				self      )  ->							Tuple:
           return {
               "vocab": self.vocab,
               "merges": self.merges,
               "max_length": self.max_length,
               "pad_token_id": self.pad_token_id,
           }







       def 							_a      (				self     ,UpperCAmelCase_     ,UpperCAmelCase_ = None      )  ->							Tuple:
           lowercase__		       =						self.tf_tokenizer(UpperCAmelCase_      )
           lowercase__		       =						tf.ones_like(UpperCAmelCase_      )

           if self.pad_token_id is not None:
               # pad the tokens up to max length
               lowercase__		       =						max_length if max_length is not None else self.max_length

               if max_length is not None:
                   lowercase__       ,       lowercase__		       =						pad_model_inputs(
                       UpperCAmelCase_     ,max_seq_length=UpperCAmelCase_     ,pad_value=self.pad_token_id      )

           return {"attention_mask": attention_mask, "input_ids": input_ids}




