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How to use perform_operation method in freezegun

Best Python code snippet using freezegun

unit_tests.py

Source:unit_tests.py

...35        result = calculate_prefix("* * 1 2")36        self.assertEqual(result, 2)37class TestPerformOp(unittest.TestCase):38    def test_simple_add(self):39        result = perform_operation("+", 2, 3)40        self.assertEqual(result, 5)41    def test_simple_subtract(self):42        result = perform_operation("-", 8, 3)43        self.assertEqual(result, 5)44    def test_simple_multiply(self):45        result = perform_operation("*", 5, 1)46        self.assertEqual(result, 5)47    def test_simple_divide(self):48        result = perform_operation("/", 10, 2)49        self.assertEqual(result, 5)50    def test_negative_add(self):51        result = perform_operation("+", -2, 7)52        self.assertEqual(result, 5)53    def test_negative_subtract(self):54        result = perform_operation("-", 3, -2)55        self.assertEqual(result, 5)56    def test_negative_multiple(self):57        result = perform_operation("*", -1, -5)58        self.assertEqual(result, 5)59    def test_negative_divide(self):60        result = perform_operation("/", -10, -2)61        self.assertEqual(result, 5)62    def test_large_add(self):63        result = perform_operation("+", 2**30, 1)64        self.assertEqual(result, (2**30 + 1))65    def test_large_subtract(self):66        result = perform_operation("-", 2**30, 1)67        self.assertEqual(result, (2**30 - 1))68    def test_large_multiply(self):69        result = perform_operation("*", 2**30, 1)70        self.assertEqual(result, 2**30)71    def test_large_divide(self):72        result = perform_operation("/", 2**30, 1)73        self.assertEqual(result, 2**30)74    def test_type_error_num(self):75        self.assertRaises(TypeError, perform_operation, "+", 2, "3")76    def test_type_error_op(self):77        self.assertRaises(TypeError, perform_operation, 5, 2, 3)78    def test_value_error(self):79        self.assertRaises(ValueError, perform_operation, "(", 2, 3)80    def test_zero_add(self):81        result = perform_operation("+", 5, 0)82        self.assertEqual(result, 5)83    def test_zero_subtract(self):84        result = perform_operation("-", 5, 0)85        self.assertEqual(result, 5)86    def test_zero_multiply(self):87        result = perform_operation("*", 5, 0)88        self.assertEqual(result, 0)89    def test_zero_divide(self):90        self.assertRaises(ZeroDivisionError, perform_operation, "/", 2, 0)91class CalculateInfix(unittest.TestCase):92    def test_one_calc(self):93        result = calculate_infix("( 1 + 2 )")94        self.assertEqual(result, 3)95    def test_add_one_calc(self):96        result = calculate_infix("( 1 + ( 2 * 3 ) )")97        self.assertEqual(result, 7)98    def test_one_calc_add(self):99        result = calculate_infix("( ( 1 * 2 ) + 3 )")100        self.assertEqual(result, 5)101    def test_two_calc_divide_subtract(self):...

001.py

Source:001.py

...42    return x / 243def square(x):44    return x ** 245# The not-so-good way:46def perform_operation(x, chosen_operation="add_one"):47    if chosen_operation == "add_one":48        x = add_one(x)49    elif chosen_operation == "divide_by_two":50        x = divide_by_two(x)51    elif chosen_operation == "square":52        x = square(x)53    else:54        raise Exception("Invalid operation")55    return x56def add_one(x):57    return x + 158def divide_by_two(x):59    return x / 260def square(x):61    return x ** 262def invalid_op(x):63    raise Exception("Invalid operation")64# The better way:65def perform_operation(x, chosen_operation="add_one"):66    ops = {67        "add_one": add_one,68        "divide_by_two": divide_by_two,69        "square": square70    }71    chosen_operation_function = ops.get(chosen_operation, invalid_op)72    return chosen_operation_function(x)73perform_operation(10)74######################################################################################################################75def add(x, to=1):76    return x + to77def divide(x, by=2):78    return x / by79def square(x):80    return x ** 281def invalid_op(x):82    raise Exception("Invalid operation")83def perform_operation(x, chosen_operation, operation_args=None):84    # If operation_args wasn't provided (i.e. it is None), set it to be an empty dictionary85    operation_args = operation_args or {}86    ops = {87        "add": add,88        "divide": divide,89        "square": square90    }91    chosen_operation_function = ops.get(chosen_operation, invalid_op)92    return chosen_operation_function(x, **operation_args)93def example_usage():94    x = 195    x = perform_operation(x, "add", {"to": 4})  # Adds 496    x = perform_operation(x, "add")  # Adds 1 since that's the default for 'add'97    x = perform_operation(x, "divide", {"by": 2})  # Divides by 298    x = perform_operation(x, "square")  # Squares the number...

py_dos_and_donts.py

Source:py_dos_and_donts.py

...35    return x / 236def square(x):37    return x**238# The not-so-good way:39def perform_operation(x, chosen_operation="add_one"):40    if chosen_operation == "add_one":41        x = add_one(x)42    elif chosen_operation == "divide_by_two":43        x = divide_by_two(x)44    elif chosen_operation == "square":45        x = square(x)46    else:47        raise Exception("Invalid operation")48    return x49# the better way50def invalid_op(x):51    raise Exception("Invalid operation")52# The better way:53def perform_operation(x, chosen_operation="add_one"):54    ops = {"add_one": add_one, "divide_by_two": divide_by_two, "square": square}55    chosen_operation_function = ops.get(chosen_operation, invalid_op)56    return chosen_operation_function(x)57# Bonus: Dynamic functions with custom arguments -> dict unpacking58def user_print(user_name, user_type="regular", user_logged_in=False):59    return f"{user_name} is a(n) {user_type} user and they are {'not ' if not user_logged_in else ''}logged in."60# 1. Without dictionary unpacking:61user_print(user_name="testuser1", user_type="admin", user_logged_in=True)62# 2. With dictionary unpacking:63args = {"user_name": "testuser1", "user_type": "admin", "user_logged_in": True}64user_print(**args)65def add(x, to=1):66    return x + to67def divide(x, by=2):68    return x / by69def square(x):70    return x**271def invalid_op(x):72    raise Exception("Invalid operation")73def perform_operation(x, chosen_operation, operation_args=None):74    # If operation_args wasn't provided (i.e. it is None), set it to be an empty dictionary75    operation_args = operation_args or {}76    ops = {"add": add, "divide": divide, "square": square}77    chosen_operation_function = ops.get(chosen_operation, invalid_op)78    return chosen_operation_function(x, **operation_args)79def example_usage():80    x = 181    x = perform_operation(x, "add", {"to": 4})  # Adds 482    x = perform_operation(x, "add")  # Adds 1 since that's the default for 'add'83    x = perform_operation(x, "divide", {"by": 2})  # Divides by 2...

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