add model

app.py

@@ -12,7 +12,8 @@ def df2code(df):
 {rows}
 ])'''
 
-def predict(input, append, num_samples):
+def predict(input, model, append, num_samples):
+  assert model == 'macavaney/doc2query-t5-base-msmarco'
   doc2query.append = append
   doc2query.num_samples = num_samples
   code = f'''
@@ -21,7 +22,7 @@ def predict(input, append, num_samples):
 ```python
 import pandas as pd
 from pyterrier_doc2query import Doc2Query
-doc2query = Doc2Query(append={append}, num_samples={num_samples})
+doc2query = Doc2Query({repr(model)}, append={append}, num_samples={num_samples})
 doc2query({df2code(input)})
 ```
 '''
@@ -37,6 +38,11 @@ gr.Interface(
       wrap=True,
       label='Pipeline Input',
       value=[['0', 'The presence of communication amid scientific minds was equally important to the success of the Manhattan Project as scientific intellect was. The only cloud hanging over the impressive achievement of the atomic researchers and engineers is what their success truly meant; hundreds of thousands of innocent lives obliterated.']],
+    ), gr.Dropdown(
+      choices=['macavaney/doc2query-t5-base-msmarco'],
+      value='macavaney/doc2query-t5-base-msmarco',
+      label='Model',
+      interactive=False,
     ), gr.Checkbox(
       value=False,
       label="Append",