22103962

2.7 Exercises.py

@@ -3,6 +3,21 @@ def rotateR(val):
     return val[-1] + val[:-1] if len(val) > 0 else None
 
 
+# question 2
+def rotateL(val):
+    return val[:-1] + val[0] if len(val) > 0 else None
+
+
+# question 3
+"""
+The provided functions rotateR and rotateL are designed to work with both strings and lists. 
+There's no issue with their functionality for either data type.
+example rotateR using strings and lists  -- rotateR("abc") == "cab" and rotateR([1,2,3,4]) == [4,1,2,3]
+example rotateL using strings and lists  -- rotateL("abc") == "bca" and rotateL([1,2,3,4 ]) == [2,3,4,1]
+
+"""
+
+
 # question 4
 def rotateRx(val):
     val[:] = [val[-1]] + val[:-1]
@@ -16,9 +31,8 @@ def rotateRx_modified(val):
     # So the only way to achieve this would be to return a value and assign it back.
     pass
 
-# question 6
-
 
+# question 6
 def rotateR2(val):
     return rotateR(rotateR(val))
 

4_9_Exercises/Question 1.py

+def reverse_list_or_string(input_list_or_string):
+    if len(input_list_or_string) == 0:
+        return input_list_or_string
+    else:
+        return reverse_list_or_string(input_list_or_string[1:]) + [input_list_or_string[0]]
+
+# Example usage for reversing a list
+my_list = [1, 2, 3, 4, 5]
+print(reverse_list_or_string(my_list))  # Output: [5, 4, 3, 2, 1]
+
+# Example usage for reversing a string
+my_string = "Hello, World!"
+print(''.join(reverse_list_or_string(list(my_string))))  # Output: "!dlroW ,olleH"