


from typing import TYPE_CHECKING

from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_torch_available


A							:					Dict     						=     {
    '''configuration_bigbird_pegasus''': [
        '''BIGBIRD_PEGASUS_PRETRAINED_CONFIG_ARCHIVE_MAP''',
        '''BigBirdPegasusConfig''',
        '''BigBirdPegasusOnnxConfig''',
    ],
}

try:
	if not is_torch_available():
		raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
	pass
else:
	A							:					List[Any]     						=     [
	    '''BIGBIRD_PEGASUS_PRETRAINED_MODEL_ARCHIVE_LIST''',
	    '''BigBirdPegasusForCausalLM''',
	    '''BigBirdPegasusForConditionalGeneration''',
	    '''BigBirdPegasusForQuestionAnswering''',
	    '''BigBirdPegasusForSequenceClassification''',
	    '''BigBirdPegasusModel''',
	    '''BigBirdPegasusPreTrainedModel''',
	]


if TYPE_CHECKING:
	from .configuration_bigbird_pegasus import (
	    BIGBIRD_PEGASUS_PRETRAINED_CONFIG_ARCHIVE_MAP,
	    BigBirdPegasusConfig,
	    BigBirdPegasusOnnxConfig,
	)

	try:
		if not is_torch_available():
			raise OptionalDependencyNotAvailable()
	except OptionalDependencyNotAvailable:
		pass
	else:
		from .modeling_bigbird_pegasus import (
		    BIGBIRD_PEGASUS_PRETRAINED_MODEL_ARCHIVE_LIST,
		    BigBirdPegasusForCausalLM,
		    BigBirdPegasusForConditionalGeneration,
		    BigBirdPegasusForQuestionAnswering,
		    BigBirdPegasusForSequenceClassification,
		    BigBirdPegasusModel,
		    BigBirdPegasusPreTrainedModel,
		)


else:
	import sys

	A							:					int     						=     _LazyModule(__name__, globals()['__file__'], _import_structure, module_spec=__spec__)









import itertools
import string
from collections.abc import Generator, Iterable





def 	_lowerCAmelCase       (    _lowerCAmelCase      ,	_lowerCAmelCase )						->	Generator[tuple[str, ...], None, None]:


						'''simple docstring'''






						__snake_case				=		iter(_lowerCAmelCase )
						while True:
												__snake_case				=		tuple(itertools.islice(_lowerCAmelCase      ,	_lowerCAmelCase ) )
												if not chunk:
																		return
												yield chunk





def 	_lowerCAmelCase       (    _lowerCAmelCase )						->	str:


						'''simple docstring'''






						__snake_case				=		"".join([c.upper() for c in dirty if c in string.ascii_letters] )
						__snake_case				=		""

						if len(_lowerCAmelCase ) < 2:
												return dirty

						for i in range(len(_lowerCAmelCase ) - 1 ):
												clean += dirty[i]

												if dirty[i] == dirty[i + 1]:
																		clean += "X"

						clean += dirty[-1]

						if len(_lowerCAmelCase ) & 1:
												clean += "X"

						return clean





def 	_lowerCAmelCase       (    _lowerCAmelCase )						->	list[str]:


						'''simple docstring'''






						__snake_case				=		"ABCDEFGHIKLMNOPQRSTUVWXYZ"
						# we're using a list instead of a '2d' array because it makes the math
						# for setting up the table and doing the actual encoding/decoding simpler
						__snake_case				=		[]

						# copy key chars into the table if they are in `alphabet` ignoring duplicates
						for char in key.upper():
												if char not in table and char in alphabet:
																		table.append(_lowerCAmelCase )

    # fill the rest of the table in with the remaining alphabet chars
						for char in alphabet:
												if char not in table:
																		table.append(_lowerCAmelCase )

						return table





def 	_lowerCAmelCase       (    _lowerCAmelCase      ,	_lowerCAmelCase )						->	str:


						'''simple docstring'''






						__snake_case				=		generate_table(_lowerCAmelCase )
						__snake_case				=		prepare_input(_lowerCAmelCase )
						__snake_case				=		""

						# https://en.wikipedia.org/wiki/Playfair_cipher#Description
						for chara, chara in chunker(_lowerCAmelCase      ,	2 ):
												__snake_case		,					__snake_case				=		divmod(table.index(_lowerCAmelCase )      ,	5 )
												__snake_case		,					__snake_case				=		divmod(table.index(_lowerCAmelCase )      ,	5 )

												if rowa == rowa:
																		ciphertext += table[rowa * 5 + (cola + 1) % 5]
																		ciphertext += table[rowa * 5 + (cola + 1) % 5]
												elif cola == cola:
																		ciphertext += table[((rowa + 1) % 5) * 5 + cola]
																		ciphertext += table[((rowa + 1) % 5) * 5 + cola]
												else:  # rectangle
																		ciphertext += table[rowa * 5 + cola]
																		ciphertext += table[rowa * 5 + cola]

						return ciphertext





def 	_lowerCAmelCase       (    _lowerCAmelCase      ,	_lowerCAmelCase )						->	str:


						'''simple docstring'''






						__snake_case				=		generate_table(_lowerCAmelCase )
						__snake_case				=		""

						# https://en.wikipedia.org/wiki/Playfair_cipher#Description
						for chara, chara in chunker(_lowerCAmelCase      ,	2 ):
												__snake_case		,					__snake_case				=		divmod(table.index(_lowerCAmelCase )      ,	5 )
												__snake_case		,					__snake_case				=		divmod(table.index(_lowerCAmelCase )      ,	5 )

												if rowa == rowa:
																		plaintext += table[rowa * 5 + (cola - 1) % 5]
																		plaintext += table[rowa * 5 + (cola - 1) % 5]
												elif cola == cola:
																		plaintext += table[((rowa - 1) % 5) * 5 + cola]
																		plaintext += table[((rowa - 1) % 5) * 5 + cola]
												else:  # rectangle
																		plaintext += table[rowa * 5 + cola]
																		plaintext += table[rowa * 5 + cola]

						return plaintext





