fix(pt): use eval mode in the Python interface

Same as deepmodeling#4402

Signed-off-by: Jinzhe Zeng <[email protected]>

deepmd/pt/infer/deep_eval.py

@@ -143,6 +143,7 @@ def __init__(
                 self.model_def_script = {}
         else:
             raise ValueError("Unknown model file format!")
+        self.dp.eval()
         self.rcut = self.dp.model["Default"].get_rcut()
         self.type_map = self.dp.model["Default"].get_type_map()
         if isinstance(auto_batch_size, bool):