require name and email

.idea/other.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="PySciProjectComponent">
+    <option name="PY_MATPLOTLIB_IN_TOOLWINDOW" value="false" />
+  </component>
+</project>

app.py

@@ -19,7 +19,7 @@ st.write("Full assignment submission instructions are here:\n"
 uploaded_file = st.file_uploader("Choose a file")
 if uploaded_file is not None:
     name = st.text_input('Please write your full name.')
-    email = st.text_input("...and your email address.")
+    email = st.text_input("...and your email address. Both are *required* to evaluate your submission.")
     projections = pd.read_csv(uploaded_file)
     st.write("The first five rows of the received file are:")
     st.write(projections.iloc[0:5, :])
@@ -29,7 +29,7 @@ if uploaded_file is not None:
         st.write(f"You were this close to MARCEL by MAE:\n{marcel_score}")
         st.write(f"MARCEL had a median absolute error of {MARCEL_ERROR}")
         st.write(f"Your own projections had a mean absolute error of {better_score}")
-        if better_score < MARCEL_ERROR:
+        if (better_score < MARCEL_ERROR) and name and email:
             st.write("Congratulations! You beat MARCEL.")
             essay = st.text_area("Write a short essay explaining how. Paste it in here and press ctrl+enter.")
             if essay: