{ "cells": [ { "cell_type": "markdown", "metadata": { "collapsed": true }, "source": [ "# Ipython 解释器" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "## 进入ipython" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "通常我们并不使用**Python**自带的解释器，而是使用另一个比较方便的解释器——**ipython**解释器，命令行下输入：\n", "\n", " ipython\n", "\n", "即可进入**ipython**解释器。\n", "\n", "所有在**python**解释器下可以运行的代码都可以在**ipython**解释器下运行：" ] }, { "cell_type": "code", "execution_count": 1, "metadata": { "scrolled": true }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "hello, world\n" ] } ], "source": [ "print (\"hello, world\")" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "可以进行简单赋值操作：" ] }, { "cell_type": "code", "execution_count": 2, "metadata": {}, "outputs": [], "source": [ "a = 'sss'" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "直接在解释器中输入变量名，会显示变量的值（不需要加`print`）：" ] }, { "cell_type": "code", "execution_count": 3, "metadata": {}, "outputs": [ { "data": { "text/plain": [ "'sss'" ] }, "execution_count": 3, "metadata": {}, "output_type": "execute_result" } ], "source": [ "a" ] }, { "cell_type": "code", "execution_count": 4, "metadata": {}, "outputs": [ { "data": { "text/plain": [ "str" ] }, "execution_count": 4, "metadata": {}, "output_type": "execute_result" } ], "source": [ "type(a)" ] }, { "cell_type": "code", "execution_count": 5, "metadata": {}, "outputs": [ { "data": { "text/plain": [ "2" ] }, "execution_count": 5, "metadata": {}, "output_type": "execute_result" } ], "source": [ "a=2\n", "a" ] }, { "cell_type": "code", "execution_count": 6, "metadata": {}, "outputs": [], "source": [ "b = [1, 2, 3]" ] }, { "cell_type": "code", "execution_count": 7, "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "[1, 2, 3]\n" ] }, { "data": { "text/plain": [ "list" ] }, "execution_count": 7, "metadata": {}, "output_type": "execute_result" } ], "source": [ "print(b)\n", "type(b)" ] }, { "cell_type": "code", "execution_count": 8, "metadata": { "scrolled": true }, "outputs": [ { "data": { "text/plain": [ "1" ] }, "execution_count": 8, "metadata": {}, "output_type": "execute_result" } ], "source": [ "b[0]" ] }, { "cell_type": "code", "execution_count": 9, "metadata": {}, "outputs": [ { "ename": "IndexError", "evalue": "list index out of range", "output_type": "error", "traceback": [ "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m", "\u001b[1;31mIndexError\u001b[0m Traceback (most recent call last)", "\u001b[1;32m\u001b[0m in \u001b[0;36m\u001b[1;34m\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mb\u001b[0m\u001b[1;33m[\u001b[0m\u001b[1;36m3\u001b[0m\u001b[1;33m]\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m", "\u001b[1;31mIndexError\u001b[0m: list index out of range" ] } ], "source": [ "b[3]" ] }, { "cell_type": "code", "execution_count": 10, "metadata": {}, "outputs": [ { "data": { "text/plain": [ "list" ] }, "execution_count": 10, "metadata": {}, "output_type": "execute_result" } ], "source": [ "type(b)" ] }, { "cell_type": "code", "execution_count": 11, "metadata": {}, "outputs": [ { "data": { "text/plain": [ "3" ] }, "execution_count": 11, "metadata": {}, "output_type": "execute_result" } ], "source": [ "b=3\n", "b" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "# ipython magic命令" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "# **ipython**解释器提供了很多以百分号`%`开头的`magic`命令，\n", "\n", "这些命令很像linux系统下的命令行命令（事实上有些是一样的）。\n", "\n", "查看所有的`magic`命令：" ] }, { "cell_type": "code", "execution_count": 9, "metadata": {}, "outputs": [ { "data": { "application/json": { "cell": { "!": "OSMagics", "HTML": "Other", "SVG": "Other", "bash": "Other", "capture": "ExecutionMagics", "cmd": "Other", "debug": "ExecutionMagics", "file": "Other", "html": "DisplayMagics", "javascript": "DisplayMagics", "js": "DisplayMagics", "latex": "DisplayMagics", "markdown": "DisplayMagics", "perl": "Other", "prun": "ExecutionMagics", "pypy": "Other", "python": "Other", "python2": "Other", "python3": "Other", "ruby": "Other", "script": "ScriptMagics", "sh": "Other", "svg": "DisplayMagics", "sx": "OSMagics", "system": "OSMagics", "time": "ExecutionMagics", "timeit": "ExecutionMagics", "writefile": "OSMagics" }, "line": { "alias": "OSMagics", "alias_magic": "BasicMagics", "autoawait": "AsyncMagics", "autocall": "AutoMagics", "automagic": "AutoMagics", "autosave": "KernelMagics", "bookmark": "OSMagics", "cd": "OSMagics", "clear": "KernelMagics", "cls": "KernelMagics", "colors": "BasicMagics", "conda": "PackagingMagics", "config": "ConfigMagics", "connect_info": "KernelMagics", "copy": "Other", "ddir": "Other", "debug": "ExecutionMagics", "dhist": "OSMagics", "dirs": "OSMagics", "doctest_mode": "BasicMagics", "echo": "Other", "ed": "Other", "edit": "KernelMagics", "env": "OSMagics", "gui": "BasicMagics", "hist": "Other", "history": "HistoryMagics", "killbgscripts": "ScriptMagics", "ldir": "Other", "less": "KernelMagics", "load": "CodeMagics", "load_ext": "ExtensionMagics", "loadpy": "CodeMagics", "logoff": "LoggingMagics", "logon": "LoggingMagics", "logstart": "LoggingMagics", "logstate": "LoggingMagics", "logstop": "LoggingMagics", "ls": "Other", "lsmagic": "BasicMagics", "macro": "ExecutionMagics", "magic": "BasicMagics", "matplotlib": "PylabMagics", "mkdir": "Other", "more": "KernelMagics", "notebook": "BasicMagics", "page": "BasicMagics", "pastebin": "CodeMagics", "pdb": "ExecutionMagics", "pdef": "NamespaceMagics", "pdoc": "NamespaceMagics", "pfile": "NamespaceMagics", "pinfo": "NamespaceMagics", "pinfo2": "NamespaceMagics", "pip": "PackagingMagics", "popd": "OSMagics", "pprint": "BasicMagics", "precision": "BasicMagics", "prun": "ExecutionMagics", "psearch": "NamespaceMagics", "psource": "NamespaceMagics", "pushd": "OSMagics", "pwd": "OSMagics", "pycat": "OSMagics", "pylab": "PylabMagics", "qtconsole": "KernelMagics", "quickref": "BasicMagics", "recall": "HistoryMagics", "rehashx": "OSMagics", "reload_ext": "ExtensionMagics", "ren": "Other", "rep": "Other", "rerun": "HistoryMagics", "reset": "NamespaceMagics", "reset_selective": "NamespaceMagics", "rmdir": "Other", "run": "ExecutionMagics", "save": "CodeMagics", "sc": "OSMagics", "set_env": "OSMagics", "store": "StoreMagics", "sx": "OSMagics", "system": "OSMagics", "tb": "ExecutionMagics", "time": "ExecutionMagics", "timeit": "ExecutionMagics", "unalias": "OSMagics", "unload_ext": "ExtensionMagics", "who": "NamespaceMagics", "who_ls": "NamespaceMagics", "whos": "NamespaceMagics", "xdel": "NamespaceMagics", "xmode": "BasicMagics" } }, "text/plain": [ "Available line magics:\n", "%alias %alias_magic %autoawait %autocall %automagic %autosave %bookmark %cd %clear %cls %colors %conda %config %connect_info %copy %ddir %debug %dhist %dirs %doctest_mode %echo %ed %edit %env %gui %hist %history %killbgscripts %ldir %less %load %load_ext %loadpy %logoff %logon %logstart %logstate %logstop %ls %lsmagic %macro %magic %matplotlib %mkdir %more %notebook %page %pastebin %pdb %pdef %pdoc %pfile %pinfo %pinfo2 %pip %popd %pprint %precision %prun %psearch %psource %pushd %pwd %pycat %pylab %qtconsole %quickref %recall %rehashx %reload_ext %ren %rep %rerun %reset %reset_selective %rmdir %run %save %sc %set_env %store %sx %system %tb %time %timeit %unalias %unload_ext %who %who_ls %whos %xdel %xmode\n", "\n", "Available cell magics:\n", "%%! %%HTML %%SVG %%bash %%capture %%cmd %%debug %%file %%html %%javascript %%js %%latex %%markdown %%perl %%prun %%pypy %%python %%python2 %%python3 %%ruby %%script %%sh %%svg %%sx %%system %%time %%timeit %%writefile\n", "\n", "Automagic is ON, % prefix IS NOT needed for line magics." ] }, "execution_count": 9, "metadata": {}, "output_type": "execute_result" } ], "source": [ "%lsmagic" ] }, { "cell_type": "raw", "metadata": {}, "source": [ "`line magic` 以一个百分号开头，作用与一行；\n", "\n", "`cell magic` 以两个百分号开头，作用于整个cell。\n", "\n", "最后一行`Automagic is ON, % prefix IS NOT needed for line magics.`说明在此时即使不加上`%`也可以使用这些命令。\n", "\n", "使用 `whos` 查看当前的变量空间：" ] }, { "cell_type": "code", "execution_count": 12, "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "Variable Type Data/Info\n", "----------------------------\n", "a int 2\n", "b int 3\n" ] } ], "source": [ "%whos" ] }, { "cell_type": "code", "execution_count": 13, "metadata": {}, "outputs": [ { "data": { "text/plain": [ "(2, 3)" ] }, "execution_count": 13, "metadata": {}, "output_type": "execute_result" } ], "source": [ "a,b" ] }, { "cell_type": "raw", "metadata": {}, "source": [ "\n", "使用 `reset` 重置当前变量空间：" ] }, { "cell_type": "code", "execution_count": 13, "metadata": {}, "outputs": [], "source": [ "%reset -f" ] }, { "cell_type": "raw", "metadata": {}, "source": [ "\n", "再查看当前变量空间：" ] }, { "cell_type": "code", "execution_count": 14, "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "Interactive namespace is empty.\n" ] } ], "source": [ "%whos" ] }, { "cell_type": "code", "execution_count": 15, "metadata": {}, "outputs": [ { "ename": "NameError", "evalue": "name 'a' is not defined", "output_type": "error", "traceback": [ "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m", "\u001b[1;31mNameError\u001b[0m Traceback (most recent call last)", "\u001b[1;32m\u001b[0m in \u001b[0;36m\u001b[1;34m\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0ma\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m", "\u001b[1;31mNameError\u001b[0m: name 'a' is not defined" ] } ], "source": [ "a" ] }, { "cell_type": "raw", "metadata": {}, "source": [ "\n", "使用 `pwd` 查看当前工作文件夹：" ] }, { "cell_type": "code", "execution_count": 16, "metadata": {}, "outputs": [ { "data": { "text/plain": [ "'d:\\\\tangH\\\\py3-master\\\\第一章python介绍'" ] }, "execution_count": 16, "metadata": {}, "output_type": "execute_result" } ], "source": [ "%pwd" ] }, { "cell_type": "raw", "metadata": {}, "source": [ "\n", "使用 `mkdir` 产生新文件夹：" ] }, { "cell_type": "code", "execution_count": 17, "metadata": {}, "outputs": [], "source": [ "%mkdir demo_test" ] }, { "cell_type": "raw", "metadata": {}, "source": [ "\n", "使用 `cd` 改变工作文件夹：" ] }, { "cell_type": "code", "execution_count": 18, "metadata": { "scrolled": true }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "d:\\tangH\\py3-master\\第一章python介绍\\demo_test\n" ] } ], "source": [ "%cd demo_test/" ] }, { "cell_type": "raw", "metadata": {}, "source": [ "\n", "使用 `writefile` 将cell中的内容写入文件：" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "## writefile hello_world.py" ] }, { "cell_type": "code", "execution_count": 19, "metadata": { "scrolled": true }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "Writing hello_world.py\n" ] } ], "source": [ "%%writefile hello_world.py\n", "print( \"hello world\")" ] }, { "cell_type": "code", "execution_count": 20, "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "hello world\n" ] } ], "source": [ "%run hello_world.py" ] }, { "cell_type": "raw", "metadata": {}, "source": [ "\n", "使用 `ls` 查看当前工作文件夹的文件：" ] }, { "cell_type": "code", "execution_count": 21, "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ " 驱动器 D 中的卷没有标签。\n", " 卷的序列号是 A5EB-573A\n", "\n", " d:\\tangH\\py3-master\\第一章python介绍\\demo_test 的目录\n", "\n", "2025/04/21 17:39 .\n", "2025/04/21 17:39 ..\n", "2025/04/21 17:39 23 hello_world.py\n", " 1 个文件 23 字节\n", " 2 个目录 86,275,854,336 可用字节\n" ] } ], "source": [ "%ls" ] }, { "cell_type": "raw", "metadata": {}, "source": [ "\n", "使用 `run` 命令来运行这个代码：" ] }, { "cell_type": "code", "execution_count": 22, "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "hello world\n" ] } ], "source": [ "%run hello_world.py" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "\n", "删除这个文件：" ] }, { "cell_type": "code", "execution_count": 23, "metadata": {}, "outputs": [], "source": [ "import os\n", "os.remove('hello_world.py')" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "\n", "查看当前文件夹，`hello_world.py` 已被删除：" ] }, { "cell_type": "code", "execution_count": 24, "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ " 驱动器 D 中的卷没有标签。\n", " 卷的序列号是 A5EB-573A\n", "\n", " d:\\tangH\\py3-master\\第一章python介绍\\demo_test 的目录\n", "\n", "2025/04/21 17:42 .\n", "2025/04/21 17:42 ..\n", " 0 个文件 0 字节\n", " 2 个目录 86,275,829,760 可用字节\n" ] } ], "source": [ "%ls" ] }, { "cell_type": "raw", "metadata": {}, "source": [ "\n", "返回上一层文件夹：" ] }, { "cell_type": "code", "execution_count": 25, "metadata": { "scrolled": true }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "d:\\tangH\\py3-master\\第一章python介绍\n" ] } ], "source": [ "%cd .." ] }, { "cell_type": "raw", "metadata": {}, "source": [ "\n", "使用 `rmdir` 删除文件夹：" ] }, { "cell_type": "code", "execution_count": 26, "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "[WinError 2] 系统找不到指定的文件。: '第一章python介绍'\n", "d:\\tangH\\py3-master\\第一章python介绍\n" ] } ], "source": [ "%cd 第一章python介绍" ] }, { "cell_type": "code", "execution_count": 27, "metadata": {}, "outputs": [], "source": [ "%rmdir demo_test" ] }, { "cell_type": "code", "execution_count": 28, "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ " 驱动器 D 中的卷没有标签。\n", " 卷的序列号是 A5EB-573A\n", "\n", " d:\\tangH\\py3-master\\第一章python介绍 的目录\n", "\n", "2025/04/21 17:43 .\n", "2025/04/21 17:43 ..\n", "2022/03/02 17:19 .ipynb_checkpoints\n", "2024/10/09 15:11 14,563 01为什么要学习python.ipynb\n", "2025/04/21 17:27 16,408 02python的历史.ipynb\n", "2025/04/21 17:40 28,299 03 ipython interpreter常用命令.ipynb\n", "2024/03/08 11:03 20,279 04 use anaconda.ipynb\n", "2024/03/22 11:25 53,304 05a tour of python简单入门.ipynb\n", "2024/03/22 11:37 12,952 06python基础小结.ipynb\n", "2019/02/26 00:24 117,510 2009排行.jpg\n", "2019/02/26 00:30 69,282 2010排行.jpg\n", "2019/02/26 00:34 81,070 2011排行.jpg\n", "2019/02/25 23:54 98,621 2012排行.jpg\n", "2019/02/26 00:38 84,395 2013排行.jpg\n", "2019/02/26 00:39 88,638 2014排行.jpg\n", "2019/02/25 23:56 57,730 2015排行.jpg\n", "2019/02/25 23:56 85,214 2016排行.png\n", "2019/02/25 23:09 18,475 2018排行.jpg\n", "2019/02/26 01:41 110,065 python精美图形1.png\n", "2019/02/26 01:35 82,129 py画图2.png\n", "2019/02/26 01:36 10,867 py画图3.png\n", "2017/10/23 23:19 443,641 为什么1.png\n", "2019/02/26 01:26 344,721 颜值评估.png\n", "2019/02/26 01:18 15,336 语言功能.jpg\n", " 21 个文件 1,853,499 字节\n", " 3 个目录 86,275,829,760 可用字节\n" ] } ], "source": [ "%ls" ] }, { "cell_type": "raw", "metadata": {}, "source": [ "\n", "使用 `hist` 查看历史命令：" ] }, { "cell_type": "code", "execution_count": 29, "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "print (\"hello, world\")\n", "a = 'sss'\n", "a\n", "type(a)\n", "a=2\n", "a\n", "b = [1, 2, 3]\n", "print(b)\n", "type(b)\n", "b[0]\n", "b[3]\n", "type(b)\n", "b=3\n", "b\n", "%whos\n", "%reset -f\n", "%whos\n", "a\n", "%pwd\n", "%mkdir demo_test\n", "%cd demo_test/\n", "%%writefile hello_world.py\n", "print( \"hello world\")\n", "%run hello_world.py\n", "%ls\n", "%run hello_world.py\n", "import os\n", "os.remove('hello_world.py')\n", "%ls\n", "%cd ..\n", "%cd 第一章python介绍\n", "%rmdir demo_test\n", "%ls\n", "%hist\n" ] } ], "source": [ "%hist" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "# ipython 使用" ] }, { "cell_type": "raw", "metadata": {}, "source": [ "\n", "使用 `?` 查看函数的帮助：" ] }, { "cell_type": "code", "execution_count": 30, "metadata": {}, "outputs": [ { "data": { "text/plain": [ "6" ] }, "execution_count": 30, "metadata": {}, "output_type": "execute_result" } ], "source": [ "sum([1,2,3])" ] }, { "cell_type": "code", "execution_count": 31, "metadata": {}, "outputs": [], "source": [ "sum?" ] }, { "cell_type": "code", "execution_count": 32, "metadata": {}, "outputs": [], "source": [ "sum??" ] }, { "cell_type": "raw", "metadata": {}, "source": [ "\n", "使用 `??` 查看函数帮助和函数源代码（如果是用**python**实现的）：" ] }, { "cell_type": "code", "execution_count": 33, "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "Using matplotlib backend: TkAgg\n", "Populating the interactive namespace from numpy and matplotlib\n" ] } ], "source": [ "# 导入numpy和matplotlib两个包\n", "%pylab\n", "# 查看其中sort函数的帮助\n", "sort??" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "**ipython** 支持使用 `` 键自动补全命令。" ] }, { "cell_type": "code", "execution_count": null, "metadata": {}, "outputs": [], "source": [ "import" ] }, { "cell_type": "raw", "metadata": {}, "source": [ "\n", "使用 `_` 使用上个cell的输出结果：" ] }, { "cell_type": "code", "execution_count": 35, "metadata": {}, "outputs": [ { "data": { "text/plain": [ "12" ] }, "execution_count": 35, "metadata": {}, "output_type": "execute_result" } ], "source": [ "a = 12\n", "a" ] }, { "cell_type": "code", "execution_count": 36, "metadata": {}, "outputs": [ { "data": { "text/plain": [ "12" ] }, "execution_count": 36, "metadata": {}, "output_type": "execute_result" } ], "source": [ "_" ] }, { "cell_type": "code", "execution_count": 37, "metadata": {}, "outputs": [ { "data": { "text/plain": [ "25" ] }, "execution_count": 37, "metadata": {}, "output_type": "execute_result" } ], "source": [ "_ + 13" ] }, { "cell_type": "code", "execution_count": 38, "metadata": {}, "outputs": [ { "data": { "text/plain": [ "25" ] }, "execution_count": 38, "metadata": {}, "output_type": "execute_result" } ], "source": [ "_" ] }, { "cell_type": "code", "execution_count": 39, "metadata": {}, "outputs": [ { "data": { "text/plain": [ "5" ] }, "execution_count": 39, "metadata": {}, "output_type": "execute_result" } ], "source": [ "2+3" ] }, { "cell_type": "code", "execution_count": 40, "metadata": {}, "outputs": [ { "data": { "text/plain": [ "5" ] }, "execution_count": 40, "metadata": {}, "output_type": "execute_result" } ], "source": [ "_" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "# 可以使用 `!` 来执行一些系统命令。" ] }, { "cell_type": "code", "execution_count": 41, "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "\n", "正在 Ping baidu.com [39.156.66.10] 具有 32 字节的数据:\n", "来自 39.156.66.10 的回复: 字节=32 时间=31ms TTL=48\n", "来自 39.156.66.10 的回复: 字节=32 时间=30ms TTL=48\n", "来自 39.156.66.10 的回复: 字节=32 时间=30ms TTL=48\n", "来自 39.156.66.10 的回复: 字节=32 时间=166ms TTL=48\n", "\n", "39.156.66.10 的 Ping 统计信息:\n", " 数据包: 已发送 = 4，已接收 = 4，丢失 = 0 (0% 丢失)，\n", "往返行程的估计时间(以毫秒为单位):\n", " 最短 = 30ms，最长 = 166ms，平均 = 64ms\n" ] } ], "source": [ "!ping baidu.com" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "当输入出现错误时，**ipython**会指出出错的位置和原因：" ] }, { "cell_type": "code", "execution_count": 42, "metadata": {}, "outputs": [ { "ename": "TypeError", "evalue": "unsupported operand type(s) for +: 'int' and 'str'", "output_type": "error", "traceback": [ "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m", "\u001b[1;31mTypeError\u001b[0m Traceback (most recent call last)", "\u001b[1;32m\u001b[0m in \u001b[0;36m\u001b[1;34m\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[1;36m1\u001b[0m \u001b[1;33m+\u001b[0m \u001b[1;34m\"hello\"\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m", "\u001b[1;31mTypeError\u001b[0m: unsupported operand type(s) for +: 'int' and 'str'" ] } ], "source": [ "1 + \"hello\"" ] }, { "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": "3.8.0" }, "toc": { "base_numbering": 1, "nav_menu": {}, "number_sections": true, "sideBar": true, "skip_h1_title": false, "title_cell": "Table of Contents", "title_sidebar": "Contents", "toc_cell": false, "toc_position": { "height": "calc(100% - 180px)", "left": "10px", "top": "150px", "width": "256px" }, "toc_section_display": true, "toc_window_display": true } }, "nbformat": 4, "nbformat_minor": 1 }