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adding copy argument to QFTGate.__array__ (backport #12979) #12987

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Aug 20, 2024
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adding copy argument to QFTGate.__array__ (backport #12979) #12987

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4 changes: 3 additions & 1 deletion qiskit/circuit/library/basis_change/qft.py
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Original file line number Diff line number Diff line change
Expand Up @@ -315,8 +315,10 @@ def __init__(
"""
super().__init__(name="qft", num_qubits=num_qubits, params=[])

def __array__(self, dtype=complex):
def __array__(self, dtype=complex, copy=None):
"""Return a numpy array for the QFTGate."""
if copy is False:
raise ValueError("unable to avoid copy while creating an array as requested")
n = self.num_qubits
nums = np.arange(2**n)
outer = np.outer(nums, nums)
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