done pandas and numpy

Author: singhsidhukuldeep

.gitignore

@@ -129,4 +129,11 @@ dmypy.json
 .pyre/
 
 # pdf_output
-/pdf_output
+/pdf_output
+
+# Example data files
+docs/Cheat-Sheets/array.txt
+docs/Cheat-Sheets/arrays.npz
+docs/Cheat-Sheets/array.npy
+docs/Cheat-Sheets/data.csv
+docs/Cheat-Sheets/data.dat