update readme with dc2

README.md

@@ -28,9 +28,8 @@ For `ind` input, if a data in one of the modalities is invalid(such as NaN) or y
  *Write the pipeline code*:
 
 ```python
+from towhee.dc2 import pipe, ops, DataCollection
 import torch
-from towhee import Entity
-import towhee
 
 torch.manual_seed(42)
 
@@ -59,8 +58,13 @@ ind = {
 }
 text = torch.randn(batch_size, 1, 37, 768).to(device)
 
-towhee.dc([Entity(experts=experts, ind=ind, text=text)]) \
-    .video_text_embedding.collaborative_experts[('experts', 'ind', 'text'), ('text_embds', 'vid_embds')](device=device).show()
+p = (
+    pipe.input('experts', 'ind', 'text') \
+        .map(('experts', 'ind', 'text'),('text_embds', 'vid_embds') , ops.video_text_embedding.collaborative_experts(device=device)) \
+        .output('experts', 'ind', 'text', 'text_embds', 'vid_embds')
+)
+
+DataCollection(p(experts, ind, text)).show()
 ```
 
 ![](img.png)