{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "值Hello world 类型<class 'str'>\n"
     ]
    }
   ],
   "source": [
    "x='Hello world'\n",
    "print('值'+x+' 类型'+str(type(x)))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "he says\" No other love but you.\"\n",
      "he says\" I'm not waking up another morning without being able to look at you next to me.\"\n",
      "If I were spelling out my favorite thing in the world, it'd be spelled 'Y-O-U'.\n",
      "I love you not because of who you are, but because of who I am when I am with you.\n"
     ]
    }
   ],
   "source": [
    "# 转义字符\n",
    "print(\"he says\\\" No other love but you.\\\"\")\n",
    "print('he says\" I\\'m not waking up another morning without being able to look at you next to me.\"')\n",
    "print(\"If I were spelling out my favorite thing in the world, it'd be spelled 'Y-O-U'.\")\n",
    "print('I love you not because of who you are, but because of who I am when I am with you.')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "看天气预报的时候 \n",
      "会先看你住的地方 \n",
      "今天好像会变暖和呢\n",
      "\n"
     ]
    }
   ],
   "source": [
    "# 跨行输入\n",
    "x= '''看天气预报的时候 \n",
    "会先看你住的地方 \n",
    "今天好像会变暖和呢\n",
    "'''\n",
    "print(x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 24,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "65\n",
      "A\n",
      "48\n",
      "32\n",
      "10\n",
      "9\n",
      "13\n",
      "92\n",
      "\\\\\\n\n",
      "29579\n",
      "王\n"
     ]
    }
   ],
   "source": [
    "print(ord('A'))\n",
    "print(chr(65))\n",
    "print(ord('0'))\n",
    "print(ord(' '))\n",
    "print(ord('\\n'))\n",
    "print(ord('\\t'))\n",
    "print(ord('\\r'))\n",
    "print(ord('\\\\'))\n",
    "# raw 字符串格式下不转义\"\\\"\n",
    "print(r'\\\\\\n')\n",
    "print (ord('王'))\n",
    "print (chr(29579))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "True\n",
      "True\n",
      "False\n"
     ]
    }
   ],
   "source": [
    "print('a'<'b')\n",
    "print('abcde'<'abdce')\n",
    "print('abcde'<'abcd')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 38,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "5\n",
      "h\n",
      "o\n",
      "l\n",
      "h\n",
      "ell\n",
      "ell\n",
      "\n",
      "\n",
      "ello\n",
      "hell\n",
      "hello\n",
      "ello\n",
      "hell\n"
     ]
    }
   ],
   "source": [
    "x='hello'\n",
    "print(len(x))\n",
    "print(x[0])\n",
    "print(x[4])\n",
    "# print(x[5])\n",
    "print(x[-3])\n",
    "print(x[-5])\n",
    "# print(x[-6])\n",
    "print(x[1:4])\n",
    "print(x[1:-1])\n",
    "print(x[2:2])\n",
    "print(x[2:1])\n",
    "print(x[1:])\n",
    "print(x[:4])\n",
    "print(x[:])\n",
    "print(x[1:100])\n",
    "print(x[-100:4])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 39,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "hello world\n"
     ]
    }
   ],
   "source": [
    "x=\"hello\"\n",
    "y=\" world\"\n",
    "z=x+y\n",
    "print(z)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 40,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "hellohellohello\n"
     ]
    }
   ],
   "source": [
    "print(\"hello\"*3)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 41,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "True\n"
     ]
    }
   ],
   "source": [
    "print('H'in 'Hello')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 42,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "False\n"
     ]
    }
   ],
   "source": [
    "print('A'in'Hello')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 43,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "True\n"
     ]
    }
   ],
   "source": [
    "print('ll'in'Hello')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 44,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "False\n"
     ]
    }
   ],
   "source": [
    "print('Ho'in'Hello')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 45,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "False\n"
     ]
    }
   ],
   "source": [
    "print('H' not in 'Hello')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 46,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "True\n"
     ]
    }
   ],
   "source": [
    "print('A' not in'Hello')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 47,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "False\n"
     ]
    }
   ],
   "source": [
    "print('ll'  not in'Hello')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 48,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "True\n"
     ]
    }
   ],
   "source": [
    "print('Ho' not in'Hello')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 49,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "True"
      ]
     },
     "execution_count": 49,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "'Hello'.startswith('He')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 50,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "True"
      ]
     },
     "execution_count": 50,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "'Hello'.startswith('H')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 51,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "False"
      ]
     },
     "execution_count": 51,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "'Hello'.startswith('o')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 52,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "True"
      ]
     },
     "execution_count": 52,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "'Hello'.endswith('o')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 53,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "2"
      ]
     },
     "execution_count": 53,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "'Hello'.count('l')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 54,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1"
      ]
     },
     "execution_count": 54,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "'Hello'.count('He')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 55,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "0"
      ]
     },
     "execution_count": 55,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "'Hello'.count('a')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 56,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'a,b,c'"
      ]
     },
     "execution_count": 56,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "','.join(['a','b','c'])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 57,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'abc'"
      ]
     },
     "execution_count": 57,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "''.join(['a','b','c'])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 58,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'6乘以7等于42'"
      ]
     },
     "execution_count": 58,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "'6乘以7等于{}'.format('42')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 59,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'2乘以3等于6'"
      ]
     },
     "execution_count": 59,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "a=2\n",
    "b=3\n",
    "c=6\n",
    "'{0}乘以{1}等于{2}'.format(a,b,c)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 61,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'2乘以3等于6'"
      ]
     },
     "execution_count": 61,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "a=2\n",
    "b=3\n",
    "c=6\n",
    "'{first}乘以{second}等于{third}'.format(first=a,second=b,third=c)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 64,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "5.6923076923076925\n",
      "5.69\n"
     ]
    }
   ],
   "source": [
    "x=74/13\n",
    "print(x)\n",
    "print('{:.2f}'.format(x))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3",
   "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": "3.7.0"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}