Created on Cognitive Class Labs

Python Lab2-2.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['Michael Jackson', 10.1, 1982]"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Create a list\n",
    "\n",
    "L = [\"Michael Jackson\", 10.1, 1982]\n",
    "L"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "the same element using negative and positive indexing:\n",
      " Postive: Michael Jackson \n",
      " Negative: Michael Jackson\n",
      "the same element using negative and positive indexing:\n",
      " Postive: 10.1 \n",
      " Negative: 10.1\n",
      "the same element using negative and positive indexing:\n",
      " Postive: 1982 \n",
      " Negative: 1982\n"
     ]
    }
   ],
   "source": [
    "# Print the elements on each index\n",
    "\n",
    "print('the same element using negative and positive indexing:\\n Postive:',L[0],\n",
    "'\\n Negative:' , L[-3]  )\n",
    "print('the same element using negative and positive indexing:\\n Postive:',L[1],\n",
    "'\\n Negative:' , L[-2]  )\n",
    "print('the same element using negative and positive indexing:\\n Postive:',L[2],\n",
    "'\\n Negative:' , L[-1]  )"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['Michael Jackson', 10.1, 1982]"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Create a list\n",
    "\n",
    "L = [\"Michael Jackson\", 10.1, 1982]\n",
    "L"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'L' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[0;32m<ipython-input-1-d7bfeec8d475>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[1;32m      1\u001b[0m \u001b[0;31m# Print the elements on each index\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      2\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 3\u001b[0;31m print('the same element using negative and positive indexing:\\n Postive:',L[0],\n\u001b[0m\u001b[1;32m      4\u001b[0m '\\n Negative:' , L[-3]  )\n\u001b[1;32m      5\u001b[0m print('the same element using negative and positive indexing:\\n Postive:',L[1],\n",
      "\u001b[0;31mNameError\u001b[0m: name 'L' is not defined"
     ]
    }
   ],
   "source": [
    "# Print the elements on each index\n",
    "\n",
    "print('the same element using negative and positive indexing:\\n Postive:',L[0],\n",
    "'\\n Negative:' , L[-3]  )\n",
    "print('the same element using negative and positive indexing:\\n Postive:',L[1],\n",
    "'\\n Negative:' , L[-2]  )\n",
    "print('the same element using negative and positive indexing:\\n Postive:',L[2],\n",
    "'\\n Negative:' , L[-1]  )"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['Michael Jackson', 10.1, 1982, [1, 2], ('A', 1)]"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Sample List\n",
    "\n",
    "[\"Michael Jackson\", 10.1, 1982, [1, 2], (\"A\", 1)]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['Michael Jackson', 10.1, 1982, 'MJ', 1]"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Sample List\n",
    "\n",
    "L = [\"Michael Jackson\", 10.1,1982,\"MJ\",1]\n",
    "L"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['MJ', 1]"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# List slicing\n",
    "\n",
    "L[3:5]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['Michael Jackson', 10.2, 'pop', 10]"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Use extend to add elements to list\n",
    "\n",
    "L = [ \"Michael Jackson\", 10.2]\n",
    "L.extend(['pop', 10])\n",
    "L"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['Michael Jackson', 10.2, ['pop', 10]]"
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Use append to add elements to list\n",
    "\n",
    "L = [ \"Michael Jackson\", 10.2]\n",
    "L.append(['pop', 10])\n",
    "L"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['Michael Jackson', 10.2, ['pop', 10], ['a', 'b']]"
      ]
     },
     "execution_count": 7,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Use append to add elements to list\n",
    "\n",
    "L.append(['a','b'])\n",
    "L"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Before change: ['disco', 10, 1.2]\n",
      "After change: ['hard rock', 10, 1.2]\n"
     ]
    }
   ],
   "source": [
    "# Change the element based on the index\n",
    "\n",
    "A = [\"disco\", 10, 1.2]\n",
    "print('Before change:', A)\n",
    "A[0] = 'hard rock'\n",
    "print('After change:', A)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Before change: ['hard rock', 10, 1.2]\n",
      "After change: [10, 1.2]\n"
     ]
    }
   ],
   "source": [
    "# Delete the element based on the index\n",
    "\n",
    "print('Before change:', A)\n",
    "del(A[0])\n",
    "print('After change:', A)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['hard', 'rock']"
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Split the string, default is by space\n",
    "\n",
    "'hard rock'.split()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['A', 'B', 'C', 'D']"
      ]
     },
     "execution_count": 11,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Split the string by comma\n",
    "\n",
    "'A,B,C,D'.split(',')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "A: ['hard rock', 10, 1.2]\n",
      "B: ['hard rock', 10, 1.2]\n"
     ]
    }
   ],
   "source": [
    "# Copy (copy by reference) the list A\n",
    "\n",
    "A = [\"hard rock\", 10, 1.2]\n",
    "B = A\n",
    "print('A:', A)\n",
    "print('B:', B)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "B[0]: hard rock\n",
      "B[0]: banana\n"
     ]
    }
   ],
   "source": [
    "# Examine the copy by reference\n",
    "\n",
    "print('B[0]:', B[0])\n",
    "A[0] = \"banana\"\n",
    "print('B[0]:', B[0])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['banana', 10, 1.2]"
      ]
     },
     "execution_count": 14,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Clone (clone by value) the list A\n",
    "\n",
    "B = A[:]\n",
    "B\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "B[0]: banana\n",
      "B[0]: banana\n"
     ]
    }
   ],
   "source": [
    "print('B[0]:', B[0])\n",
    "A[0] = \"hard rock\"\n",
    "print('B[0]:', B[0])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[1, 'hello', [1, 2, 3], True]"
      ]
     },
     "execution_count": 16,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Write your code below and press Shift+Enter to execute\n",
    "\n",
    "a_list = [1, 'hello', [1, 2, 3] , True]\n",
    "a_list"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'hello'"
      ]
     },
     "execution_count": 17,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Write your code below and press Shift+Enter to execute\n",
    "\n",
    "a_list[1]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['hello', [1, 2, 3], True]"
      ]
     },
     "execution_count": 18,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Write your code below and press Shift+Enter to execute\n",
    "\n",
    "a_list[1:4]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[1, 'a', 2, 1, 'd']"
      ]
     },
     "execution_count": 20,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Write your code below and press Shift+Enter to execute\n",
    "\n",
    "A = [1, 'a'] \n",
    "B = [2, 1, 'd']\n",
    "A + B"
   ]
  }
 ],
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