Update app.py

app.py

@@ -104,7 +104,28 @@ with st.expander("Home bar"):
     # st.button(label='Reset', on_click=reset_bar)
 
 with st.expander("Find similar recipes"):
-    st.selectbox("Select a recipe:", recipes['name'].unique())
+    default = '< PICK A VALUE >'
+    st.selectbox("Select a recipe:", recipes['name'].unique(), default=default)
+
+    def similarity(ratings, kind='user', epsilon=1e-9):
+        if kind == 'user':
+            sim = ratings.dot(ratings.T) + epsilon
+        elif kind == 'item':
+            sim = ratings.T.dot(ratings) + epsilon
+        norms = np.array([np.sqrt(np.diagonal(sim))])
+        return (sim / norms / norms.T)
+
+    pivot = ingredients[['name', 'ingredients']].copy()
+    pivot['count'] = 1
+    pivot = pivot.set_index(['name', 'ingredients'])['count'].unstack().reset_index()
+    pivot.rename_axis(None, axis=1, inplace=True)
+    pivot.fillna(0, inplace=True)
+    pivot_names = pivot.columns
+    pivot_np = np.array(pivot.set_index('name'))
+    recipe_similarity = pd.DataFrame(similarity(pivot_np, kind='user'))
+    recipe_similarity.columns = pivot['name'].values
+    recipe_similarity.index = pivot['name'].values
+    #recipe_similarity
 
 st.header("Recipes")
 filter_all = list(set(filter_name) & set(filter_ingredient) & set(filter_source) & set(filter_type) & set(st.session_state.filter_bar))