[TVM FFI] Always return pointer in __c_dlpack_exchange_api__ to avoid import torch when loading paddle (PaddlePaddle#77533)

Author: SigureMo

python/paddle/base/dygraph/tensor_patch_methods.py

@@ -1624,34 +1624,6 @@ def __tvm_ffi_env_stream__(self) -> int:
                 "Currently, the __tvm_ffi_env_stream__ method is only supported for GPU tensors."
             )
 
-    def _get_c_dlpack_exchange_api():
-        """
-        Returns the C DLPack exchange API pointer for the current tensor.
-        This is used for interoperability with other libraries that support DLPack.
-
-        In tvm ffi 0.1.3 or below, this API returns the pointer directly.
-        In newer versions, it returns a python capsule containing the pointer.
-        """
-        try:
-            import tvm_ffi
-
-            tvm_ffi_version = tuple(
-                int(x) for x in tvm_ffi.__version__.split(".")
-            )
-            # We assume version format is like '0.1.3'.
-            # All supported releases are '0.1.0', '0.1.1', '0.1.2', '0.1.3'.
-            # We simply assume user will not use beta/rc versions here.
-            # TODO(dev): We should cleanup this after tvm ffi 0.1.3 is not supported.
-            if tvm_ffi_version <= (0, 1, 3):
-                return core.dlpack_exchange_api_ptr()
-        except Exception:
-            pass
-        # For tvm ffi 0.1.4 only, in tvm ffi 0.1.5+, replaced by `__dlpack_c_exchange_api__`
-        return core.dlpack_exchange_api_pycapsule()
-
-    if not hasattr(core, "eager"):
-        return
-
     for method_name, method in (
         ("__bool__", __bool__),
         ("__nonzero__", __nonzero__),
@@ -1698,8 +1670,9 @@ def _get_c_dlpack_exchange_api():
         ("__dlpack_device__", __dlpack_device__),
         ("get_device", get_device),
         ("__tvm_ffi_env_stream__", __tvm_ffi_env_stream__),
-        # For TVM FFI 0.1.0-0.1.4, replaced by `__dlpack_c_exchange_api__` in TVM FFI 0.1.5+
-        ("__c_dlpack_exchange_api__", _get_c_dlpack_exchange_api()),
+        # For TVM FFI 0.1.0-0.1.4
+        ("__c_dlpack_exchange_api__", core.dlpack_exchange_api_ptr()),
+        # For TVM FFI 0.1.5+
         ("__dlpack_c_exchange_api__", core.dlpack_exchange_api_pycapsule()),
         ("device", device),
     ):