fix: SupportSTDP.stdp_update keyword typo and DSRunner deprecation warning (#864)

- mixin.py: align base SupportSTDP.stdp_update placeholder keyword onn_post -> on_post.
- runners.py: DSRunner.predict emitted the inputs_are_batching deprecation via
  `raise warnings.warn(...)` (TypeError); now warns and continues.
mypy brainpy/ clean; STDP suites (91 tests) + warn-path verified.

Author: chaoming0625

brainpy/dnn/linear.py

@@ -226,7 +226,7 @@ def offline_fit(self,
             self.W.value = Wff
             self.b.value = bias[0]
 
-    def stdp_update(  # type: ignore[override]  # base SupportSTDP.stdp_update is a permissive *args/**kwargs placeholder (with an `onn_post` typo); concrete overrides declare explicit params
+    def stdp_update(  # type: ignore[override]  # base SupportSTDP.stdp_update is a permissive *args/**kwargs placeholder; concrete overrides declare explicit params
         self,
         on_pre: Optional[Dict] = None,
         on_post: Optional[Dict] = None,
@@ -334,7 +334,7 @@ def update(self, pre_val):
                 post_val = pre_val @ self.weight
         return post_val
 
-    def stdp_update(  # type: ignore[override]  # base SupportSTDP.stdp_update is a permissive *args/**kwargs placeholder (with an `onn_post` typo); concrete overrides declare explicit params
+    def stdp_update(  # type: ignore[override]  # base SupportSTDP.stdp_update is a permissive *args/**kwargs placeholder; concrete overrides declare explicit params
         self,
         on_pre: Optional[Dict] = None,
         on_post: Optional[Dict] = None,
@@ -397,7 +397,7 @@ def __init__(
     def update(self, pre_val):
         return pre_val * self.weight
 
-    def stdp_update(  # type: ignore[override]  # base SupportSTDP.stdp_update is a permissive *args/**kwargs placeholder (with an `onn_post` typo); concrete overrides declare explicit params
+    def stdp_update(  # type: ignore[override]  # base SupportSTDP.stdp_update is a permissive *args/**kwargs placeholder; concrete overrides declare explicit params
         self,
         on_pre: Optional[Dict] = None,
         on_post: Optional[Dict] = None,
@@ -484,7 +484,7 @@ def __init__(
     def update(self, x):
         return x @ self.mask_fun(self.weight * self.mask)
 
-    def stdp_update(  # type: ignore[override]  # base SupportSTDP.stdp_update is a permissive *args/**kwargs placeholder (with an `onn_post` typo); concrete overrides declare explicit params
+    def stdp_update(  # type: ignore[override]  # base SupportSTDP.stdp_update is a permissive *args/**kwargs placeholder; concrete overrides declare explicit params
         self,
         on_pre: Optional[Dict] = None,
         on_post: Optional[Dict] = None,
@@ -535,7 +535,7 @@ def __init__(
             w = bm.TrainVar(w)
         self.weight = w
 
-    def stdp_update(  # type: ignore[override]  # base SupportSTDP.stdp_update is a permissive *args/**kwargs placeholder (with an `onn_post` typo); concrete overrides declare explicit params
+    def stdp_update(  # type: ignore[override]  # base SupportSTDP.stdp_update is a permissive *args/**kwargs placeholder; concrete overrides declare explicit params
         self,
         on_pre: Optional[Dict] = None,
         on_post: Optional[Dict] = None,

brainpy/mixin.py

@@ -544,5 +544,5 @@ class SupportSTDP(MixIn):
     """Support synaptic plasticity by modifying the weights.
     """
 
-    def stdp_update(self, *args, on_pre=None, onn_post=None, **kwargs):
+    def stdp_update(self, *args, on_pre=None, on_post=None, **kwargs):
         raise NotImplementedError

brainpy/runners.py

@@ -452,9 +452,9 @@ def predict(
         """
 
         if inputs_are_batching is not None:
-            raise warnings.warn(  # type: ignore[misc]  # latent bug: warnings.warn returns None; preserved to avoid behavior change
+            warnings.warn(
                 f'''
-        `inputs_are_batching` is no longer supported. 
+        `inputs_are_batching` is no longer supported.
         The target mode of {self.target.mode} has already indicated the input should be batching.
         ''',
                 UserWarning