{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# 成员测试"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Python 提供了“in” 和“not in”运算符，用于测试某对象是否为字符串、列表或元组等序列或集合中的<font color=Red>__成员__</font>，返回<font color=Red>__布尔值__</font>（True 或False）。"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "应用“in”测试时，如果该对象在指定的序列中存在，则返回True，否则返回False。应用“not in”测试时，正好相反。  \n",
    "成员测试一般用于<font color=Red>__条件运算__</font>，根据测试结果决定执行后续程序中的某个分支。"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "northeast = ['辽宁', '吉林', '黑龙江']\n",
    "province = input()\n",
    "if province in northeast:\n",
    "    print(f'{province}是东北三省之一')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [],
   "source": [
    "northeast = ['辽宁', '吉林', '黑龙江']\n",
    "province = input()\n",
    "if province not in northeast:\n",
    "    print(f'{province}不是东北三省之一')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "scrolled": true
   },
   "outputs": [],
   "source": [
    "# 输入身份证号，输出性别\n",
    "\n",
    "id_number = input()           # 测试数据是合法的18位身份证号\n",
    "if id_number[16] in '13579':  # 若第17位数字在'13579'中存在，为奇数，或if id_number[-2] in '13579':\n",
    "    gender = '男'\n",
    "else:\n",
    "    gender = '女'\n",
    "print(f'性别： {gender}')"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 实例 6.7 判断火车票座位 "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "我国高铁二等座车座席采用2+3布置，每排设有“3+2”方式排列五个座位，以“A、B、C、D、F”代表,字母“A”和“F”的座位靠窗，字母“C”和“D”靠中间过道，“B”代表三人座中间座席。  ‪‬‪‬‪‬‪‬‪‬‮‬‪‬‭‬‪‬‪‬‪‬‪‬‪‬‮‬‪‬‪‬‪‬‪‬‪‬‪‬‪‬‮‬‫‬‪‬‪‬‪‬‪‬‪‬‪‬‮‬‪‬‪‬\n",
    "用户输入一个数字和一个字母组成的合法的座位号，根据字母判断位置是窗口、过道还是中间座席。"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "seat = input()\n",
    "if seat[-1] in 'AF':\n",
    "    print(f'{seat}是{seat[:-1]}排{\"窗口\"}')\n",
    "elif seat[-1] in 'CD':\n",
    "    print(f'{seat}是{seat[:-1]}排{\"过道\"}')\n",
    "elif seat[-1] == 'B':\n",
    "    print(f'{seat}是{seat[:-1]}排{\"中间\"}')\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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