字典.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 51,
   "outputs": [],
   "source": [
    "language = {\n",
    "    'one' : 'python',\n",
    "    'two' : 'java',\n",
    "    'three' : 'c', \n",
    "    'four' : 'javascript',\n",
    "}"
   ],
   "metadata": {
    "collapsed": false,
    "pycharm": {
     "name": "#%%\n",
     "is_executing": false
    }
   }
  },
  {
   "cell_type": "markdown",
   "source": [
    "访问字典"
   ],
   "metadata": {
    "collapsed": false,
    "pycharm": {
     "name": "#%% md\n"
    }
   }
  },
  {
   "cell_type": "code",
   "execution_count": 52,
   "outputs": [
    {
     "name": "stdout",
     "text": [
      "python\n",
      "python\n"
     ],
     "output_type": "stream"
    }
   ],
   "source": [
    "print(language['one'])\n",
    "\n",
    "print(language.get('one'))"
   ],
   "metadata": {
    "collapsed": false,
    "pycharm": {
     "name": "#%%\n",
     "is_executing": false
    }
   }
  },
  {
   "cell_type": "markdown",
   "source": [
    "删除key:value"
   ],
   "metadata": {
    "collapsed": false,
    "pycharm": {
     "name": "#%% md\n"
    }
   }
  },
  {
   "cell_type": "code",
   "execution_count": 46,
   "outputs": [
    {
     "name": "stdout",
     "text": [
      "{'one': 'python', 'two': 'java', 'three': 'c', 'four': 'javascript'}\n",
      "{'one': 'python', 'two': 'java', 'three': 'c'}\n"
     ],
     "output_type": "stream"
    }
   ],
   "source": [
    "print(language)\n",
    "del language['four']\n",
    "print(language)"
   ],
   "metadata": {
    "collapsed": false,
    "pycharm": {
     "name": "#%% \n",
     "is_executing": false
    }
   }
  },
  {
   "cell_type": "markdown",
   "source": [
    "遍历字典key,value"
   ],
   "metadata": {
    "collapsed": false,
    "pycharm": {
     "name": "#%% md\n"
    }
   }
  },
  {
   "cell_type": "code",
   "execution_count": 47,
   "outputs": [
    {
     "name": "stdout",
     "text": [
      "one : python\n",
      "two : java\n",
      "three : c\n"
     ],
     "output_type": "stream"
    }
   ],
   "source": [
    "for k,v in language.items():\n",
    "    print(k,':',v)"
   ],
   "metadata": {
    "collapsed": false,
    "pycharm": {
     "name": "#%%\n",
     "is_executing": false
    }
   }
  },
  {
   "cell_type": "markdown",
   "source": [
    "遍历字典所有key"
   ],
   "metadata": {
    "collapsed": false,
    "pycharm": {
     "name": "#%% md\n"
    }
   }
  },
  {
   "cell_type": "code",
   "execution_count": 48,
   "outputs": [
    {
     "name": "stdout",
     "text": [
      "one\n",
      "two\n",
      "three\n",
      "one\n",
      "two\n",
      "three\n"
     ],
     "output_type": "stream"
    }
   ],
   "source": [
    "for key in language.keys():\n",
    "    print(key)\n",
    "\n",
    "for key in language:\n",
    "    print(key)"
   ],
   "metadata": {
    "collapsed": false,
    "pycharm": {
     "name": "#%%\n",
     "is_executing": false
    }
   }
  },
  {
   "cell_type": "markdown",
   "source": [
    "遍历字典所有value"
   ],
   "metadata": {
    "collapsed": false,
    "pycharm": {
     "name": "#%% md\n"
    }
   }
  },
  {
   "cell_type": "code",
   "execution_count": 49,
   "outputs": [
    {
     "name": "stdout",
     "text": [
      "python\n",
      "java\n",
      "c\n"
     ],
     "output_type": "stream"
    }
   ],
   "source": [
    "for value in language.values():\n",
    "    print(value)\n",
    "    "
   ],
   "metadata": {
    "collapsed": false,
    "pycharm": {
     "name": "#%%\n",
     "is_executing": false
    }
   }
  },
  {
   "cell_type": "markdown",
   "source": [
    "字典排序"
   ],
   "metadata": {
    "collapsed": false,
    "pycharm": {
     "name": "#%% md\n"
    }
   }
  },
  {
   "cell_type": "code",
   "execution_count": 50,
   "outputs": [
    {
     "name": "stdout",
     "text": [
      "{'one': 'python', 'two': 'java', 'three': 'c'}\n",
      "['one', 'three', 'two']\n"
     ],
     "output_type": "stream"
    }
   ],
   "source": [
    "print(language)\n",
    "dic = sorted(language)\n",
    "print(dic)\n"
   ],
   "metadata": {
    "collapsed": false,
    "pycharm": {
     "name": "#%%\n",
     "is_executing": false
    }
   }
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
  },
  "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"
  },
  "pycharm": {
   "stem_cell": {
    "cell_type": "raw",
    "source": [],
    "metadata": {
     "collapsed": false
    }
   }
  }
 },
 "nbformat": 4,
 "nbformat_minor": 0
}