Add weight, bias, and hidden_size methods (#816)

* Add weight, bias methods to Conv(1|2)

* Add hidden_size method to Embedding

* Expose hidden_size

candle-nn/src/conv.rs

@@ -39,6 +39,14 @@ impl Conv1d {
     pub fn config(&self) -> &Conv1dConfig {
         &self.config
     }
+
+    pub fn weight(&self) -> &Tensor {
+        &self.weight
+    }
+
+    pub fn bias(&self) -> Option<&Tensor> {
+        self.bias.as_ref()
+    }
 }
 
 impl crate::Module for Conv1d {
@@ -99,6 +107,14 @@ impl Conv2d {
     pub fn config(&self) -> &Conv2dConfig {
         &self.config
     }
+
+    pub fn weight(&self) -> &Tensor {
+        &self.weight
+    }
+
+    pub fn bias(&self) -> Option<&Tensor> {
+        self.bias.as_ref()
+    }
 }
 
 impl crate::Module for Conv2d {

candle-nn/src/embedding.rs

@@ -18,6 +18,11 @@ impl Embedding {
     pub fn embeddings(&self) -> &Tensor {
         &self.embeddings
     }
+
+    /// Get the hidden size of the embedding matrix
+    pub fn hidden_size(&self) -> usize {
+        self.hidden_size
+    }
 }
 
 impl crate::Module for Embedding {