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Fix error and add test for mutable pauli string #5213

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merged 3 commits into from
Apr 7, 2022
Merged

Fix error and add test for mutable pauli string #5213

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8ee4617
Fix error and add test for mutable pauli string
dabacon Apr 6, 2022
2d5ea01
Fix format
dabacon Apr 6, 2022
5676b97
Merge branch 'master' into paulierror
CirqBot Apr 7, 2022
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2 changes: 1 addition & 1 deletion cirq-core/cirq/ops/pauli_string.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1546,6 +1546,6 @@ def _pauli_like_to_pauli_int(key: Any, pauli_gate_like: PAULI_GATE_LIKE):
f'Expected {key!r}: {pauli_gate_like!r} to have a '
f'cirq.PAULI_GATE_LIKE value. '
f"But the value isn't in "
f"{list(PAULI_GATE_LIKE_TO_INDEX_MAP.values())!r}"
f"{set(PAULI_GATE_LIKE_TO_INDEX_MAP.keys())!r}"
)
return cast(int, pauli_int)
16 changes: 16 additions & 0 deletions cirq-core/cirq/ops/pauli_string_test.py
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Expand Up @@ -1873,6 +1873,22 @@ def test_mutable_pauli_string_dict_functionality():
assert b not in p


@pytest.mark.parametrize(
'pauli', (cirq.X, cirq.Y, cirq.Z, cirq.I, "I", "X", "Y", "Z", "i", "x", "y", "z", 0, 1, 2, 3)
)
def test_mutable_pauli_string_dict_pauli_like(pauli):
p = cirq.MutablePauliString()
# Check that is successfully converts.
p[0] = pauli


def test_mutable_pauli_string_dict_pauli_like_not_pauli_like():
p = cirq.MutablePauliString()
# Check error string includes terms like "X" in error message.
with pytest.raises(TypeError, match="PAULI_GATE_LIKE.*X"):
p[0] = 1.2


def test_mutable_pauli_string_text():
p = cirq.MutablePauliString(cirq.X(cirq.LineQubit(0)) * cirq.Y(cirq.LineQubit(1)))
assert str(cirq.MutablePauliString()) == "mutable I"
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