Update pages/3_NumpyBasics.py

pages/3_NumpyBasics.py

@@ -5,8 +5,7 @@ import numpy as np
 def example1():
     explanation = "Importing the NumPy library."
     code = "import numpy as np"
-    exec(code)
-    return explanation, code
+    return explanation, code, None
 
 def example2():
     explanation = "Creating a simple NumPy array."
@@ -170,4 +169,5 @@ for title, func in examples:
     st.write(explanation)
     st.code(code)
     if st.button(f"Run {title.split(':')[0]}"):
-        st.write("Output:", result)
+        if result is not None:
+            st.write("Output:", result)