1) Basic of Python.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "c44a306b",
   "metadata": {},
   "outputs": [],
   "source": [
    "s = \"PWskills\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "e5f3c03b",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'P'"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "s[0]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "f897a390",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'P'"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "s[-8]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "8659cc8f",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'i'"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "s[-4]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "id": "8196cd5d",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'sW'"
      ]
     },
     "execution_count": 11,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "s[2:-8:-1]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "id": "cf8e12b7",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'slliksWP'"
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "s[::-1] #reverse of the string"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "id": "68bb3510",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "''"
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "s[8:0]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "id": "a729b36d",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'PWskills'"
      ]
     },
     "execution_count": 13,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "s[::1]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "id": "bb5821d5",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'slliksWP'"
      ]
     },
     "execution_count": 14,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "s[::-1]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "id": "3fbde70e",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'PWskills'"
      ]
     },
     "execution_count": 17,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "s[:89:1] # upper limit not matters,in slicing"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "id": "daf6c9ed",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'slliksWP'"
      ]
     },
     "execution_count": 18,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "s[:-89:-1] # upper limit not matters, it can be -ve or +ve in slicing"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "id": "d8e70238",
   "metadata": {},
   "outputs": [
    {
     "ename": "TypeError",
     "evalue": "'int' object is not subscriptable",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m~\\AppData\\Local\\Temp/ipykernel_6208/1640395988.py\u001b[0m in \u001b[0;36m<module>\u001b[1;34m\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[0mc\u001b[0m \u001b[1;33m=\u001b[0m \u001b[1;36m200\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 2\u001b[1;33m \u001b[0mc\u001b[0m\u001b[1;33m[\u001b[0m\u001b[1;36m1\u001b[0m\u001b[1;33m]\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m: 'int' object is not subscriptable"
     ]
    }
   ],
   "source": [
    "c = 200\n",
    "c[1]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "id": "49a19a0f",
   "metadata": {},
   "outputs": [],
   "source": [
    "s1 = \"This is my first python class\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 21,
   "id": "58c56ced",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "2"
      ]
     },
     "execution_count": 21,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "s1.find(\"is\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "id": "364378f1",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "-1"
      ]
     },
     "execution_count": 22,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "s1.find(\"im\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 24,
   "id": "f18f53d5",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'THIS IS MY FIRST PYTHON CLASS'"
      ]
     },
     "execution_count": 24,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "s1.upper()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "daa77d25",
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3 (ipykernel)",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.9.7"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 5
}