repr(PauliString) on one qubit doesn't round-trip

[mpharrigan]

In[23]: ps = cirq.Z(q0)*1
In[24]: repr(ps)
Out[24]: 'cirq.Z.on(cirq.LineQubit(0))'
In[26]: type(ps)
Out[26]: cirq.ops.pauli_string.PauliString
In[28]: type(eval(repr(ps)))
Out[28]: cirq.ops.pauli_string.SingleQubitPauliStringGateOperation

and it is no longer a PauliString

[kevinsung]

ps == eval(repr(ps)) is True though, which is perhaps all that matters.

[mpharrigan]

If you try to include a single-qubit pauli string as part of an object for the json_serialization test it doesn't work because it compares jsonify(ps) == jsonify(eval(repr(ps)))

[cduck]

Should cirq.testing.assert_equivalent_repr also test repr(val) == repr(eval(repr(val)))?

[Ashalynd]

AFAIK Python types by themselves aren't expected to be round-trippable.

[Strilanc]

SingleQubitPauliStringGateOperation inherits from PauliString, so it is technically still a pauli string.

[95-martin-orion]

Is this still an issue?

[mpharrigan]

the behavior has not changed (I just ran the snippet provided)