Renamed to python file and some refactoring

Author: asrvd

cloning a list cloning_a_list.py

@@ -1,11 +1,17 @@
 # Python program to copy or clone a list 
 # Using the Slice Operator 
 def Cloning(li1): 
-    li_copy = li1[:] 
-    return li_copy 
+    return li1[:]
 
 # Driver Code 
-li1 = [4, 8, 2, 10, 15, 18] 
+li1 = [
+    4, 
+    8, 
+    2, 
+    10, 
+    15, 
+    18
+] 
 li2 = Cloning(li1) 
 print("Original List:", li1) 
 print("After Cloning:", li2)