hello world; list comprehension; higher order functions

airlab-unsri · Aug 12, 2024 · cc3f912 · cc3f912
1 parent ed2ddd4
commit cc3f912
Show file tree

Hide file tree

Showing 9 changed files with 862 additions and 23 deletions.
diff --git a/docs/_toc.yml b/docs/_toc.yml
@@ -21,6 +21,7 @@ parts:
     chapters:
       - file: python/python_fundamentals_1/index
         sections:
+          - file: python/python_fundamentals_1/hello_world
           - file: python/python_fundamentals_1/variables
           - file: python/python_fundamentals_1/data_types
             sections:
@@ -36,7 +37,8 @@ parts:
           - file: python/python_fundamentals_1/modules_packages
       - file: python/python_fundamentals_2/index
         sections:
-          - file: python/python_fundamentals_2/list_comprehensions
+          - file: python/python_fundamentals_2/list_comprehension
+          - file: python/python_fundamentals_2/higher_order_functions
       - file: python/oop/index
         sections:
           - file: python/oop/classes

diff --git a/docs/images/hello_world.png b/docs/images/hello_world.png
diff --git a/docs/python/python_fundamentals_1/functions.ipynb b/docs/python/python_fundamentals_1/functions.ipynb
@@ -323,7 +323,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 12,
+   "execution_count": 10,
    "id": "4f7ff307-e254-433d-ac3d-0533c2515bd3",
    "metadata": {},
    "outputs": [
@@ -347,15 +347,15 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 13,
+   "execution_count": 11,
    "id": "9fb7913b-edbd-47b4-be82-025026f248f6",
    "metadata": {},
    "outputs": [
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "Sum of two numbers:  10\n"
+      "Sum of two numbers: 10\n"
      ]
     }
    ],
@@ -370,15 +370,15 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 16,
+   "execution_count": 12,
    "id": "ff631115-e80a-4858-b34c-3cde3b6fd639",
    "metadata": {},
    "outputs": [
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "Age:  20\n"
+      "Age: 20\n"
      ]
     }
    ],
@@ -393,7 +393,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 17,
+   "execution_count": 13,
    "id": "9b0d6091-1de9-426d-89ab-06b65d7648d3",
    "metadata": {},
    "outputs": [
@@ -436,7 +436,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 19,
+   "execution_count": 14,
    "id": "140dc909-43f7-4fec-bf28-ee29ed61550e",
    "metadata": {},
    "outputs": [
@@ -459,7 +459,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 20,
+   "execution_count": 15,
    "id": "5f38fb72-2a22-4395-b296-d7af538c5bba",
    "metadata": {},
    "outputs": [
@@ -494,7 +494,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 21,
+   "execution_count": 16,
    "id": "ef091fc0-66ef-4992-ba9c-d35564d5ba43",
    "metadata": {},
    "outputs": [
@@ -504,7 +504,7 @@
        "'Aurora Luna'"
       ]
      },
-     "execution_count": 21,
+     "execution_count": 16,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -529,7 +529,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 22,
+   "execution_count": 17,
    "id": "2cf06818-b4b9-4e9c-aeb8-ed84d47224cb",
    "metadata": {},
    "outputs": [
@@ -560,7 +560,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 24,
+   "execution_count": 18,
    "id": "e804c860-c7f6-471a-b5ef-e8efa42e6297",
    "metadata": {},
    "outputs": [
@@ -592,7 +592,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 25,
+   "execution_count": 19,
    "id": "7483d320-0db0-4d86-bb1b-dd87c8e8f263",
    "metadata": {},
    "outputs": [
@@ -639,7 +639,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 26,
+   "execution_count": 20,
    "id": "02d30759-c089-4b83-a6c0-d2c14660644c",
    "metadata": {},
    "outputs": [
@@ -664,7 +664,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 27,
+   "execution_count": 21,
    "id": "61f7e7e1-472f-4090-9366-3fb8ee194e42",
    "metadata": {},
    "outputs": [
@@ -690,7 +690,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 29,
+   "execution_count": 22,
    "id": "7e13ffbc-fa4b-498f-b27b-84b6256864f8",
    "metadata": {},
    "outputs": [
@@ -713,7 +713,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 31,
+   "execution_count": 23,
    "id": "aeb734ac-4a50-4939-8281-169ce669a31b",
    "metadata": {},
    "outputs": [
@@ -753,7 +753,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 35,
+   "execution_count": 24,
    "id": "a792361e-256e-4983-b79b-aea2cdc573fa",
    "metadata": {},
    "outputs": [
@@ -802,7 +802,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 37,
+   "execution_count": 25,
    "id": "3ca2a1c0-1352-4906-80d7-0879ca705b29",
    "metadata": {},
    "outputs": [
@@ -846,7 +846,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 38,
+   "execution_count": 26,
    "id": "00706906-f108-47fb-b497-7de24731b769",
    "metadata": {},
    "outputs": [
@@ -923,7 +923,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 39,
+   "execution_count": 27,
    "id": "900748c0-c413-465d-9a3b-ff9a7e62a90b",
    "metadata": {},
    "outputs": [
@@ -949,6 +949,165 @@
     "\n",
     "print(do_something(square_number, 3))  # 27"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "cab7e9e2-3380-47ca-aa7b-416590b2a857",
+   "metadata": {},
+   "source": [
+    "## Lambda Function\n",
+    "\n",
+    "Lambda function is a small anonymous function without a name. It can take any number of arguments, but can only have one expression. Lambda function is similar to anonymous functions in JavaScript. We need it when we want to write an anonymous function inside another function.\n",
+    "\n",
+    "To create a lambda function we use lambda keyword followed by a parameter(s), followed by an expression. See the syntax and the example below. Lambda function does not use return but it explicitly returns the expression.\n",
+    "\n",
+    "```\n",
+    "x = lambda param1, param2, param3: param1 + param2 + param2\n",
+    "```"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 28,
+   "id": "3f5425b4-4619-4ba3-8758-1a208d4d7435",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "5\n",
+      "5\n"
+     ]
+    }
+   ],
+   "source": [
+    "# Named function\n",
+    "def add_two_nums(a, b):\n",
+    "    return a + b\n",
+    "\n",
+    "\n",
+    "print(add_two_nums(2, 3))\n",
+    "\n",
+    "# Lets change the above function to a lambda function\n",
+    "add_two_nums = lambda a, b: a + b\n",
+    "print(add_two_nums(2, 3))  # 5"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 29,
+   "id": "0c42d51d-e83d-4968-8654-801ee40d1e6c",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "5"
+      ]
+     },
+     "execution_count": 29,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Self invoking lambda function\n",
+    "(lambda a, b: a + b)(2, 3)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 30,
+   "id": "85950214-44ba-43c8-8cfa-c5599e86ebd9",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "9\n"
+     ]
+    }
+   ],
+   "source": [
+    "square = lambda x: x**2\n",
+    "print(square(3))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 31,
+   "id": "10732191-0fbe-44fb-b8c6-51993e40d064",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "27\n"
+     ]
+    }
+   ],
+   "source": [
+    "cube = lambda x: x**3\n",
+    "print(cube(3))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 32,
+   "id": "2f1761e2-daa6-4c91-904d-3322b736a24f",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "22\n"
+     ]
+    }
+   ],
+   "source": [
+    "multiple_variable = lambda a, b, c: a**2 - 3 * b + 4 * c\n",
+    "print(multiple_variable(5, 5, 3))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "446c7b17-577b-4e5f-ab96-d012bb9587d2",
+   "metadata": {},
+   "source": [
+    "### Lambda Function Inside Another Function"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 33,
+   "id": "2b23841f-1d3e-41b4-9884-56d091ec7d7f",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "8\n",
+      "32\n"
+     ]
+    }
+   ],
+   "source": [
+    "def power(x):\n",
+    "    return lambda n: x**n\n",
+    "\n",
+    "\n",
+    "# function power now need 2 arguments to run, in separate rounded brackets\n",
+    "cube = power(2)(3)\n",
+    "print(cube)\n",
+    "\n",
+    "two_power_of_five = power(2)(5)\n",
+    "print(two_power_of_five)"
+   ]
   }
  ],
  "metadata": {