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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def copy(self, copy_backends=True, copy_default_backend=True, copy_cache=None, copy_history=None):
 """Copy the circuit. :params copy_backends :bool copy backends if True. copy_default_backend :bool copy default_backend if True. """

        copied = Circuit(self.n_qubits, self.ops.copy())
        if copy_backends:
            copied._backends = {k: v.copy() for k, v in self._backends.items()}
        if copy_default_backend:
            copied._default_backend = self._default_backend

        # Warn for deprecated options
        if copy_cache is not None:
            warnings.warn("copy_cache is deprecated. Use copy_backends instead.",
                          DeprecationWarning)
        if copy_history is not None:
            warnings.warn("copy_history is deprecated.", DeprecationWarning)

        return copied