fix: 🐛 Logic Error (#51)

1. Logic Error in DataProto.print_size() Method
2. Missing README_android.md file

Co-authored-by: 莫岳恒 <moyueheng@52tt.com>

Author: moyueheng

setup.py

@@ -65,7 +65,7 @@
 
 
 this_directory = Path(__file__).parent
-long_description = (this_directory / "README_android.md").read_text()
+long_description = (this_directory / "README.md").read_text()
 
 setup(
     name="rl_factory",

verl/protocol.py

@@ -290,7 +290,7 @@ def load_from_disk(filepath) -> "DataProto":
 
     def print_size(self, prefix=""):
         size_of_tensordict = 0
-        if self.batch is None:
+        if self.batch is not None:
             for key, tensor in self.batch.items():
                 size_of_tensordict += tensor.element_size() * tensor.numel()
         size_of_numpy_array = 0