{
   "question_id": 7447625,
   "question_title": "根据指定值从一个列表中查找所有匹配元素的位置，要求使用列表中的index方法进行查找。",
   "question_content": "<p><strong>题目内容&#xff1a;</strong>\n编写程序实现以下功能&#xff1a;根据指定值从一个列表中查找所有匹配元素的位置&#xff0c;要求使用列表中的index方法进行查找。\n \n<strong>输入格式:</strong>\n先输入待查找元素的值。\n再输入一个整数&#xff0c;表示列表中的元素个数。\n最后依次输入列表中的元素。\n \n<strong>输出格式&#xff1a;</strong>\n输出一个列表&#xff0c;各元素值为匹配元素的位置。如果没有匹配元素&#xff0c;则输出一个空列表。\n \n<strong>输入样例&#xff1a;</strong>\n10\n5\n5\n10\n15\n10\n20\n \n<strong>输出样例&#xff1a;</strong>\n[1, 3]\n \n<strong>输入样例&#xff1a;</strong>\n30\n5\n5\n10\n15\n10\n20\n \n<strong>输出样例&#xff1a;</strong>\n[]</p>",
   "difficulty": "简单",
   "answer_id": 53427546,
   "answer_content": "<pre>\n<code class=\"language-python\">check &#61; input()\nnum &#61; int(input())\nlist1 &#61; []\nfor i in range(num):\n    x &#61; input()\n    list1.append(x)\nindices &#61; []\nstart &#61; 0\nwhile 1:\n    try:\n        x &#61; list1.index(check,start)\n        indices.append(x)\n        start &#61; x&#43;1\n    except:\n        break\nprint(indices)</code></pre>\n\n<p style=\"text-align:center\"><img alt=\"\" src=\"https://img-ask.csdnimg.cn/upload/1623404307590.png\" /></p>\n\n<p> </p>\n",
   "tag_name": "python",
   "python": "check = input()\nnum = int(input())\nlist1 = []\nfor i in range(num):\n\tx = input()\n\tlist1.append(x)\nindices = []\nstart = 0\nwhile 1:\n\ttry:\n\t\tx = list1.index(check,start)\n\t\tindices.append(x)\n\t\tstart = x+1\n\texcept:\n\t\tbreak\nprint(indices)",
   "topic_link": "https://bbs.csdn.net/topics/600469987",
   "status": 1,
   "keywords": "散列表,散列表,算法中阶,数据结构",
   "license": "csdn.net",
   "notebook": {
      "python": "https://codechina.csdn.net/csdn/csdn-daily-code/-/jupyter/master/data/notebook/answer/ipynb/python/29.ipynb?type=file"
   },
   "notebook_enable": 1
}