import numpy as np
import qiskit







def 						A__  (					__A = 8   , __A = None	):







    '''simple docstring'''
    _lowerCamelCase     :		Any 						=						np.random.default_rng(seed=__A	)

    # Roughly 25% of the qubits will contribute to the key.
    # So we take more than we need.
    _lowerCamelCase     :		Optional[int] 						=						6 * key_len
    # Measurement basis for Alice's qubits.
    _lowerCamelCase     :		Dict 						=						rng.integers(2   , size=__A	)
    # The set of states Alice will prepare.
    _lowerCamelCase     :		Optional[int] 						=						rng.integers(2   , size=__A	)
    # Measurement basis for Bob's qubits.
    _lowerCamelCase     :		Dict 						=						rng.integers(2   , size=__A	)

    # Quantum Circuit to simulate BB84
    _lowerCamelCase     :		List[Any] 						=						qiskit.QuantumCircuit(__A   , name="""BB84"""	)

    # Alice prepares her qubits according to rules above.
    for index, _ in enumerate(__A	):
        if alice_state[index] == 1:
            bbaa_circ.x(__A	)
        if alice_basis[index] == 1:
            bbaa_circ.h(__A	)
    bbaa_circ.barrier()

    # Bob measures the received qubits according to rules above.
    for index, _ in enumerate(__A	):
        if bob_basis[index] == 1:
            bbaa_circ.h(__A	)

    bbaa_circ.barrier()
    bbaa_circ.measure_all()

    # Simulate the quantum circuit.
    _lowerCamelCase     :		str 						=						qiskit.Aer.get_backend("""aer_simulator"""	)
    # We only need to run one shot because the key is unique.
    # Multiple shots will produce the same key.
    _lowerCamelCase     :		int 						=						qiskit.execute(__A   , __A   , shots=1   , seed_simulator=__A	)
    # Returns the result of measurement.
    _lowerCamelCase     :		Optional[Any] 						=						job.result().get_counts(__A	).most_frequent()

    # Extracting the generated key from the simulation results.
    # Only keep measurement results where Alice and Bob chose the same basis.
    _lowerCamelCase     :		str 						=						"""""".join(
        [
            result_bit
            for alice_basis_bit, bob_basis_bit, result_bit in zip(
                __A   , __A   , __A	)
            if alice_basis_bit == bob_basis_bit
        ]	)

    # Get final key. Pad with 0 if too short, otherwise truncate.
    _lowerCamelCase     :		Any 						=						gen_key[:key_len] if len(__A	) >= key_len else gen_key.ljust(__A   , """0"""	)
    return key


if __name__ == "__main__":
    print(F"""The generated key is : {bbaa(8, seed=0)}""")
    from doctest import testmod

    testmod()





from __future__ import annotations




class 	__snake_case	:





      '''simple docstring'''






      def __init__(					self     :				Tuple    ,  _UpperCamelCase     :				int = 0)				->str:


          """simple docstring"""


          _lowerCamelCase     :		Union[str, Any] 						=						key



      def 	_SCREAMING_SNAKE_CASE    (					self     :				Any    ,  _UpperCamelCase     :				str    ,  _UpperCamelCase     :				int)				->list[str]:


          """simple docstring"""


          assert isinstance(_UpperCamelCase    ,  _UpperCamelCase) and isinstance(_UpperCamelCase    ,  _UpperCamelCase)

          _lowerCamelCase     :		Union[str, Any] 						=						key or self.__key or 1

          # make sure key is an appropriate size
          key %= 255

          return [chr(ord(_UpperCamelCase) ^ key) for ch in content]



      def 	_SCREAMING_SNAKE_CASE    (					self     :				str    ,  _UpperCamelCase     :				str    ,  _UpperCamelCase     :				int)				->list[str]:


          """simple docstring"""


          assert isinstance(_UpperCamelCase    ,  _UpperCamelCase) and isinstance(_UpperCamelCase    ,  _UpperCamelCase)

          _lowerCamelCase     :		Optional[int] 						=						key or self.__key or 1

          # make sure key is an appropriate size
          key %= 255

          return [chr(ord(_UpperCamelCase) ^ key) for ch in content]



      def 	_SCREAMING_SNAKE_CASE    (					self     :				List[str]    ,  _UpperCamelCase     :				str    ,  _UpperCamelCase     :				int = 0)				->str:


          """simple docstring"""


          assert isinstance(_UpperCamelCase    ,  _UpperCamelCase) and isinstance(_UpperCamelCase    ,  _UpperCamelCase)

          _lowerCamelCase     :		int 						=						key or self.__key or 1

          # make sure key can be any size
          while key > 255:
              key -= 255

          # This will be returned
          _lowerCamelCase     :		Any 						=						""""""

          for ch in content:
              ans += chr(ord(_UpperCamelCase) ^ key)

          return ans



      def 	_SCREAMING_SNAKE_CASE    (					self     :				Optional[Any]    ,  _UpperCamelCase     :				str    ,  _UpperCamelCase     :				int = 0)				->str:


          """simple docstring"""


          assert isinstance(_UpperCamelCase    ,  _UpperCamelCase) and isinstance(_UpperCamelCase    ,  _UpperCamelCase)

          _lowerCamelCase     :		int 						=						key or self.__key or 1

          # make sure key can be any size
          while key > 255:
              key -= 255

          # This will be returned
          _lowerCamelCase     :		Optional[Any] 						=						""""""

          for ch in content:
              ans += chr(ord(_UpperCamelCase) ^ key)

          return ans



      def 	_SCREAMING_SNAKE_CASE    (					self     :				Optional[int]    ,  _UpperCamelCase     :				str    ,  _UpperCamelCase     :				int = 0)				->bool:


          """simple docstring"""


          assert isinstance(_UpperCamelCase    ,  _UpperCamelCase) and isinstance(_UpperCamelCase    ,  _UpperCamelCase)

          try:
              with open(_UpperCamelCase) as fin, open("""encrypt.out"""    ,  """w+""") as fout:
                  # actual encrypt-process
                  for line in fin:
                      fout.write(self.encrypt_string(_UpperCamelCase    ,  _UpperCamelCase))

          except OSError:
              return False

          return True




      def 	_SCREAMING_SNAKE_CASE    (					self     :				List[Any]    ,  _UpperCamelCase     :				str    ,  _UpperCamelCase     :				int)				->bool:


          """simple docstring"""


          assert isinstance(_UpperCamelCase    ,  _UpperCamelCase) and isinstance(_UpperCamelCase    ,  _UpperCamelCase)

          try:
              with open(_UpperCamelCase) as fin, open("""decrypt.out"""    ,  """w+""") as fout:
                  # actual encrypt-process
                  for line in fin:
                      fout.write(self.decrypt_string(_UpperCamelCase    ,  _UpperCamelCase))

          except OSError:
              return False

          return True


# Tests
# crypt = XORCipher()
# key = 67

# # test encrypt
# print(crypt.encrypt("hallo welt",key))
# # test decrypt
# print(crypt.decrypt(crypt.encrypt("hallo welt",key), key))

# # test encrypt_string
# print(crypt.encrypt_string("hallo welt",key))

# # test decrypt_string
# print(crypt.decrypt_string(crypt.encrypt_string("hallo welt",key),key))

# if (crypt.encrypt_file("test.txt",key)):
#       print("encrypt successful")
# else:
#       print("encrypt unsuccessful")

# if (crypt.decrypt_file("encrypt.out",key)):
#       print("decrypt successful")
# else:
#       print("decrypt unsuccessful")




