qnn.py issues with recent Cirq versions

[qlero]

Hello,

It seems that the qnn.py script in chapter 9 is broken for Cirq versions v0.11.0 and further, as per the release notes here, notably:

If you have old gate implementations with _resolve_parameter that doesn't support the recursive parameter, you will get an error message: TypeError: _resolve_parameters_() takes 2 positional arguments but 3 were given, you will need to add support for the recursive:bool parameter

Solution

The script can be solved by:

• line 36 -- adding recursive=True as an argument to def _resolve_parameters_(self, param_resolver):
• line 79 -- replacing wf = result.final_state with wf = result.final_state_vector

I can submit a pull request unless you have specified somewhere you're using a Cirq version older than the v0.11.0.

Best regards,

Quentin

[JackHidary]

yes - pls submit the pull request thx

On Mar 19, 2022, at 6:01 PM, quentin le roux @.***> wrote:

 Hello,

It seems that the qnn.py script in chapter 9 is broken for Cirq versions v0.11.0 and further, as per the release notes here, notably:

If you have old gate implementations with _resolve_parameter that doesn't support the recursive parameter, you will get an error message: TypeError: resolve_parameters() takes 2 positional arguments but 3 were given, you will need to add support for the recursive:bool parameter

Solution

The script can be solved by:

line 36 -- adding recursive=True to def resolve_parameters(self, param_resolver, recursive=True): line 79 -- and replacing wf = result.final_state with wf = result.final_state_vector I can submit a pull request unless you have specified somewhere you're using a Cirq version older than the v0.11.0.

Best regards,

Quentin

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[qlero]

Hello,

I submitted a pull request with the modifications. Of note, I also provided another modification:

With cirq v0.14, the class TwoQubitGate (and the three-qubit one) will be deprecated. This is solved by removing the cirq.ops.gate_features.TwoQubitGate as an inheritance argument from the class ZXGate (and others in different scripts) on lines 10-11, and replacing it with the following function in the class body:

def _num_qubits_(self):
        return 2

Best regards,

Quentin