Fix RUF015

Author: Armavica

pymc/backends/mcbackend.py

@@ -169,7 +169,7 @@ def get_sampler_stats(
                 is_ragged = True
                 continue
             else:
-                stats_arrays.append(tuple(sd.values())[0])
+                stats_arrays.append(next(iter(sd.values())))
 
         if is_ragged:
             _log.debug("Stat '%s' was not recorded by all samplers.", stat_name)

pymc/distributions/truncated.py

@@ -247,7 +247,7 @@ def loop_fn(truncated_rv, reject_draws, lower, upper, rng, *rv_inputs):
         return TruncatedRV(
             base_rv_op=dist.owner.op,
             inputs=graph_inputs_,
-            outputs=[tuple(updates.values())[0], truncated_rv_],
+            outputs=[next(iter(updates.values())), truncated_rv_],
             ndim_supp=0,
             max_n_steps=max_n_steps,
         )(*graph_inputs)

tests/logprob/test_basic.py

@@ -71,7 +71,7 @@ def test_factorized_joint_logprob_basic():
     a_value_var = a.clone()
 
     a_logp = conditional_logp({a: a_value_var})
-    a_logp_comb = tuple(a_logp.values())[0]
+    a_logp_comb = next(iter(a_logp.values()))
     a_logp_exp = logp(a, a_value_var)
 
     assert equal_computations([a_logp_comb], [a_logp_exp])

tests/test_pytensorf.py

@@ -583,7 +583,7 @@ def step_wo_update(x, rng):
             n_steps=10,
         )
 
-        assert collect_default_updates([ys]) == {rng: tuple(next_rng.values())[0]}
+        assert collect_default_updates([ys]) == {rng: next(iter(next_rng.values()))}
 
         fn = compile_pymc([], ys, random_seed=1)
         assert not (set(fn()) & set(fn()))