Fix minor NumPy compatibility warnings #434
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Pytest with NumPy 2.2.6 reports the following warnings:
```
recirq/hfvqe/objective_test.py:51: DeprecationWarning: Conversion of an array with ndim > 0 to a scalar is deprecated, and will error in future. Ensure you extract a single element from your array before performing this operation. (Deprecated NumPy 1.25.)
opdm_hw[p, q] = wf.conj().T @ operator @ wf
recirq/toric_code/toric_code_plaquettes.py:112: FutureWarning: DataFrame.applymap has been deprecated. Use DataFrame.map instead.
parities = data.applymap(
recirq/toric_code/toric_code_plaquettes.py:115: FutureWarning: Calling float on a single element Series is deprecated and will raise a TypeError in the future. Use float(ser.iloc[0]) instead
return float(parities.mean())
```
This PR makes some minor modifications to the code to get rid of the
warnings.
pavoljuhas
approved these changes
Sep 19, 2025
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Pytest with NumPy 2.2.6 reports the following warnings:
This PR makes some minor modifications to the code to get rid of the warnings.