python challenge exercise.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "def chrshift_function(num=None,list=[]):\n",
    "    num = num\n",
    "    list = list\n",
    "    Eng_list = 'abcdefghijklmnopqrstuvwxyz'\n",
    "    #做字典轉換\n",
    "    chr2num = { i:chr for chr,i in enumerate(Eng_list)}\n",
    "    num2chr = { chr:i for chr,i in enumerate(Eng_list)}\n",
    "    for i in range(num):\n",
    "        num2chr[26+int(i)]=num2chr[i]\n",
    "    \n",
    "    #將list轉成num\n",
    "    num_list = []\n",
    "    for i in list:\n",
    "        if i in chr2num:\n",
    "            num_list.append(str(chr2num.get(i)+num))\n",
    "        else :\n",
    "            num_list.append(i)\n",
    "    \n",
    "    #將num_list shift num個字再轉成answer\n",
    "    answer = []\n",
    "    for i in num_list:\n",
    "        try:\n",
    "            if int(i) in num2chr:\n",
    "                answer.append(num2chr.get(int(i)))\n",
    "            else:\n",
    "                answer.append(i)\n",
    "        except:\n",
    "            answer.append(i) \n",
    "    for j in answer:\n",
    "        print(j, end=\"\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "i hope you didnt translate it by hand. thats what computers are for. doing it in by hand is inefficient and that's why this text is so long. using string.maketrans() is recommended. now apply on the url."
     ]
    }
   ],
   "source": [
    "list = 'g fmnc wms bgblr rpylqjyrc gr zw fylb. rfyrq ufyr amknsrcpq ypc dmp. bmgle gr gl zw fylb gq glcddgagclr ylb rfyr\\'q ufw rfgq rcvr gq qm jmle. sqgle qrpgle.kyicrpylq() gq pcamkkclbcb. lmu ynnjw ml rfc spj.'\n",
    "chrshift_function(num = 2,list = list)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 2",
   "language": "python",
   "name": "python2"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 2
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython2",
   "version": "2.7.6"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 0
}