clarified description

Author: fbaptiste

Part 2/Section 09 - Project 4/project_4_description/Project - Description.ipynb

@@ -48,11 +48,10 @@
     "Create a single iterable that combines all the columns from all the iterators.\n",
     "\n",
     "The iterable should yield named tuples containing all the columns.\n",
-    "Make sure that the SSN's across the files match!\n",
     "\n",
-    "All the files are guaranteed to be in SSN sort order, and every SSN is unique, and every SSN appears in every file.\n",
+    "Normally you should ensure that the SSN's match across all the files (i.e. identical row numbers in each file refer to the same SSN). However, in this case you do not need to do so as the data is already \"aligned\" - all the files are guaranteed to be in SSN sort order, every SSN is unique, and every SSN appears in every file.\n",
     "\n",
-    "Make sure the SSN is not repeated 4 times - one time per row is enough!"
+    "Just make sure that in your iterable the SSN is not repeated 4 times - one time per row is enough!"
    ]
   },
   {
@@ -154,7 +153,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "Python 3 (ipykernel)",
    "language": "python",
    "name": "python3"
   },
@@ -168,7 +167,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.2"
+   "version": "3.9.10"
   }
  },
  "nbformat": 4,