Added custom delimiter.

app.py

@@ -66,7 +66,7 @@ st.markdown(
     with Gephi and [Gephi Light](https://gephi.org/gephi-lite/).*"""
 )
 
-try:
+#try:
 # Print explainer.
 expl = st.expander(label="More info")
 with expl:
@@ -90,20 +90,26 @@ try:
     st.session_state["sep"] = ','
 
     # Ask for separator.
+    separators = {'comma ( , )': ',', 'semicolon ( ; )': ';', 'tab ( \u21E5 )': '\t', 'pipe (|)': '|', 'space ( )': ' ', '':''}
     sep = st.radio(
         'Separator in your files:', 
-            options=['comma ( , )', 'semicolon ( ; )', 'tab ( \u21E5 )', 'pipe (|)', 'space ( )'], 
+        options=['comma ( , )', 'semicolon ( ; )', 'tab ( \u21E5 )', 'pipe (|)', 'space ( )', 'custom'], 
         help='What are the values in your files separated with?'
         )
+    if sep == 'custom':
+        sep = st.text_input('Custom delimiter:')
+        separators[sep] = sep
     
-        separators = {'comma ( , )': ',', 'semicolon ( ; )': ';', 'tab ( \u21E5 )': '\t', 'pipe (|)': '|', 'space ( )': ' '}
     st.session_state["sep"] = separators[sep]
 
 # Preview file
 with col2: 
     preview = st.button('Preview file.')
     if preview:
-            st.dataframe(pd.read_csv(csv_edges, sep=st.session_state["sep"]))
+        try:
+            st.dataframe(pd.read_csv(csv_edges, sep=st.session_state["sep"]), use_container_width=True)
+        except pd.errors.ParserError:
+            st.markdown(':red[Have you selected a correct separator?]')
 
 
 files_uploaded = st.button('Done', 'files_uploaded')
@@ -183,5 +189,5 @@ try:
             )
             st.write('Import the file to Gephi/Gephi Light, or try [Gephisto](https://jacomyma.github.io/gephisto/) to get an idea of the network.')
 
-except:
-    st.markdown(':red[Something went wrong, please try again or [write to me](https://twitter.com/lasseedfast).]')
+# except:
+#     st.markdown(':red[Something went wrong, please try again or [write to me](https://twitter.com/lasseedfast).]')