added exponentiate, square_root functions

calculator/__init__.py

@@ -1 +1 @@
-from .calcurator import add, subtract, divide, multiply
+from .calcurator import add, subtract, divide, multiply, exponentiate, square_root

calculator/calcurator.py

@@ -2,17 +2,30 @@ def add(x, y):
     """Returns the sum of x and y."""
     return x + y
 
+
 def multiply(x, y):
     """Returns the product of x and y."""
     return x * y
 
+
 def divide(x, y):
     """Returns the result of dividing x by y."""
     if y != 0:
         return x / y
     else:
         return "Error: Division by zero"
 
+
 def subtract(x, y):
     """Returns the difference between x and y."""
     return x - y
+
+
+def exponentiate(x, y):
+    """Returns x raised to the power of y."""
+    return x**y
+
+
+def square_root(x):
+    """Returns the square root of x."""
+    return x ** (1 / 2)

calculator/tests/unit_tests_calculator.py

@@ -1,23 +1,39 @@
 # test_calculator.py
 
-from calculator import add, multiply, divide, subtract
+from calculator import add, multiply, divide, subtract, exponentiate, square_root
+
 
 def test_addition():
     assert add(5, 3) == 8
     assert add(0, 0) == 0
     assert add(-5, 5) == 0
 
+
 def test_multiplication():
     assert multiply(4, 6) == 24
     assert multiply(0, 10) == 0
     assert multiply(-3, 7) == -21
 
+
 def test_division():
     assert divide(8, 2) == 4.0
     assert divide(10, 5) == 2.0
     assert divide(7, 0) == "Error: Division by zero"
 
+
 def test_subtraction():
     assert subtract(10, 7) == 3
     assert subtract(5, 5) == 0
     assert subtract(7, 10) == -3
+
+
+def test_exponentiation():
+    assert exponentiate(2, 3) == 8
+    assert exponentiate(5, 0) == 1
+    assert exponentiate(3, -2) == 1 / 9
+
+
+def test_square_root():
+    assert square_root(4) == 2
+    assert square_root(25) == 5
+    assert square_root(9) == 3