fix syntax on the dataframe

app.py

@@ -114,5 +114,5 @@ st.write(str(nx.laplacian_centrality(G)))
 d_lc = nx.laplacian_centrality(G)
 #st.write(d_lc[0])
 #df_lc = pd.DataFrame.from_dict(nx.laplacian_centrality(G))
-df_lc = pd.DataFrame(np.transpose([d_lc.keys(),d_lc.values()]),columns=['node','laplacian centrality'])
+df_lc = pd.DataFrame(np.transpose([list(d_lc.keys()),list(d_lc.values())]),columns=['node','laplacian centrality'])
 st.bar_chart(df_lc)