25-Functions and Methods Homework.ipynb

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 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Functions and Methods Homework \n",
    "\n",
    "Complete the following questions:\n",
    "____\n",
    "**Write a function that computes the volume of a sphere given its radius.**\n",
    "<p>The volume of a sphere is given as $$\\frac{4}{3} πr^3$$</p>"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [],
   "source": [
    "import math\n",
    "\n",
    "def vol(rad):\n",
    "    return 4 / 3 * math.pi * rad ** 3"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "33.510321638291124"
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Check\n",
    "vol(2)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "___\n",
    "**Write a function that checks whether a number is in a given range (inclusive of high and low)**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {},
   "outputs": [],
   "source": [
    "def ran_check(num,low,high):\n",
    "    if num >= low and num <= high:\n",
    "        return str(num) + \" is in the range between \" + str(low) + \" and \" + str(high)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 21,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'5 is in the range between 2 and 7'"
      ]
     },
     "execution_count": 21,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Check\n",
    "ran_check(5,2,7)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "If you only wanted to return a boolean:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [],
   "source": [
    "def ran_bool(num,low,high):\n",
    "    return num >= low and num <= high"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "True"
      ]
     },
     "execution_count": 15,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "ran_bool(3,1,10)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "____\n",
    "**Write a Python function that accepts a string and calculates the number of upper case letters and lower case letters.**\n",
    "\n",
    "    Sample String : 'Hello Mr. Rogers, how are you this fine Tuesday?'\n",
    "    Expected Output : \n",
    "    No. of Upper case characters : 4\n",
    "    No. of Lower case Characters : 33\n",
    "\n",
    "HINT: Two string methods that might prove useful: **.isupper()** and **.islower()**\n",
    "\n",
    "If you feel ambitious, explore the Collections module to solve this problem!"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "metadata": {},
   "outputs": [],
   "source": [
    "def up_low(s):\n",
    "    up_chars = 0\n",
    "    low_chars = 0\n",
    "    for c in s:\n",
    "        if c.isupper():\n",
    "            up_chars += 1\n",
    "        elif c.islower():\n",
    "            low_chars += 1\n",
    "    print(f\"Original String : {s}\", s)\n",
    "    print(f\"No. of Upper case characters :  {up_chars}\")\n",
    "    print(f\"No. of Lower case Characters :  {low_chars}\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Original String : Hello Mr. Rogers, how are you this fine Tuesday? Hello Mr. Rogers, how are you this fine Tuesday?\n",
      "No. of Upper case characters :  4\n",
      "No. of Lower case Characters :  33\n"
     ]
    }
   ],
   "source": [
    "s = 'Hello Mr. Rogers, how are you this fine Tuesday?'\n",
    "up_low(s)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "____\n",
    "**Write a Python function that takes a list and returns a new list with unique elements of the first list.**\n",
    "\n",
    "    Sample List : [1,1,1,1,2,2,3,3,3,3,4,5]\n",
    "    Unique List : [1, 2, 3, 4, 5]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 30,
   "metadata": {},
   "outputs": [],
   "source": [
    "def unique_list(lst):\n",
    "    return list(set(lst))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 31,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[1, 2, 3, 4, 5]"
      ]
     },
     "execution_count": 31,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "unique_list([1,1,1,1,2,2,3,3,3,3,4,5])"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "____\n",
    "**Write a Python function to multiply all the numbers in a list.**\n",
    "\n",
    "    Sample List : [1, 2, 3, -4]\n",
    "    Expected Output : -24"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 40,
   "metadata": {},
   "outputs": [],
   "source": [
    "def multiply(numbers):  \n",
    "    if len(numbers) == 1:\n",
    "        print(numbers[0])\n",
    "    else:\n",
    "        numbers[0] *= numbers.pop()\n",
    "        multiply(numbers)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 41,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "-24\n"
     ]
    }
   ],
   "source": [
    "multiply([1,2,3,-4])"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "____\n",
    "**Write a Python function that checks whether a passed in string is palindrome or not.**\n",
    "\n",
    "Note: A palindrome is word, phrase, or sequence that reads the same backward as forward, e.g., madam or nurses run."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 42,
   "metadata": {},
   "outputs": [],
   "source": [
    "def palindrome(s):\n",
    "    return s == s[::-1]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 45,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "True"
      ]
     },
     "execution_count": 45,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "palindrome('helleh')"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "____\n",
    "#### Hard:\n",
    "\n",
    "**Write a Python function to check whether a string is pangram or not.**\n",
    "\n",
    "    Note : Pangrams are words or sentences containing every letter of the alphabet at least once.\n",
    "    For example : \"The quick brown fox jumps over the lazy dog\"\n",
    "\n",
    "Hint: Look at the string module"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 46,
   "metadata": {},
   "outputs": [],
   "source": [
    "import string\n",
    "\n",
    "def ispangram(str1, alphabet=string.ascii_lowercase):\n",
    "    pangram = True\n",
    "    for letter in alphabet:\n",
    "        if letter not in str1:\n",
    "            return False\n",
    "    return True"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 49,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "True"
      ]
     },
     "execution_count": 49,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "ispangram(\"The quick brown fox jumps over the lazy dog\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'abcdefghijklmnopqrstuvwxyz'"
      ]
     },
     "execution_count": 17,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "string.ascii_lowercase"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "collapsed": true
   },
   "source": [
    "#### Great Job!"
   ]
  }
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