ipython

超详细的Python变量的基本使用

南笙酒味 提交于 2020-08-10 09:51:20
文章目录 写在开头的话 变量的基本使用 目标 01.变量的定义 1)变量演练1 —— iPython 2)变量演练2 —— PyCharm 3)变量演练3 —— 超市买苹果 思考题 提问 02.变量的类型 2.1 变量类型的演练 —— 个人信息 2.2变量的类型 2.4变量的输入 1)关于函数 2) input函数实现键盘输入 3)类型转换函数 2.5变量的格式化输出 写在最后的话: 这里是一段防爬虫文本,请读者忽略。 本文原创首发于CSDN,作者IDYS 博客首页:https://blog.csdn.net/weixin_41633902/ 本文链接:https://blog.csdn.net/weixin_41633902/article/details/107327478 未经授权,禁止转载!恶意转载,后果自负!尊重原创,远离剽窃! 写在开头的话 请记住:实践是掌握知识的最快方法 如果你只是怀着看看的态度去快速浏览文章,而不去认认真真的把文章里面讲的任何一个知识点去实践一遍,那么你永远也掌握不了它 生命不息,折腾不止! 变量的基本使用 程序就是用来处理数据的,而变量就是用来存储数据的 目标 变量的定义 变量的类型 变量的命名 01.变量的定义 在Python中,每个变量 在使用前都必须赋值 ,变量 赋值以后 该变量 才会被创建 等号( = )用来给变量赋值 =左边是一个变量名

Notebooks: Passing string variables as arguments to python script via command line(!), using quotes And $, eg -arg1 '$varible1'

两盒软妹~` 提交于 2020-08-10 05:35:12
问题 In using variables in the command line from a notebook cell, I saw that we can use put a $ in front of the variable, or surround the variable using {} , for example !command {variable} or !command $variable But when I was running a python script using the command line from a notebook cell, I would get errors variable1 = '/path/to/directory' variable2 = 7 !Script.py -arg1 $variable1 -arg2 $variable2 and !Script.py -arg1 {variable1} -arg2 {variable2} did not work. After experimenting a little

Python笔记:在 jupyter notebook中渲染网页

我的未来我决定 提交于 2020-08-10 03:56:59
渲染有三种方式:分别是 渲染文本、渲染变量、代理页面。 一、渲染文本 将htm网页内容到%%html后面,示例如下: %%html <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>chenqionghe</title> <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css"> <script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script> <script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script> </head> <body> <div class="page-header"> <h1>chenqionghe <small>yeah buddy! light weight bay!</small> </h1> </div> <p>geting muscle is not easy</p> </body> </html> 渲染效果: 二、渲染变量

Import Error: No module named arch

三世轮回 提交于 2020-08-10 01:01:10
问题 I am facing this error in iPython notebook even after installing running pip install arch command and successfully installing it. Any help would be highly appreciated. 回答1: Restart the Kernel To isolate the problem, try importing it in a normal python environment you start in the command line. 来源: https://stackoverflow.com/questions/48542243/import-error-no-module-named-arch

深入 Python —— == 和 is 的区别

落爺英雄遲暮 提交于 2020-08-08 06:33:15
== 和 is 的区别这个问题对于使用过 Python 一段时间开发人员的来说相信不是一个困难的问题。 本文将剖析 Python3.6 源码,旨在从实现细节层面把这个问题说清楚。 从字节码看起 我们先来看看 == 和 is 编译后字节码的区别: In [1]: def test(): ...: a = 1 ...: b = 1 ...: a == b ...: a is b ...: In [2]: import dis In [3]: dis.dis(test) 2 0 LOAD_CONST 1 (1) 2 STORE_FAST 0 (a) 3 4 LOAD_CONST 1 (1) 6 STORE_FAST 1 (b) 4 8 LOAD_FAST 0 (a) 10 LOAD_FAST 1 (b) 12 COMPARE_OP 2 (==) 14 POP_TOP 5 16 LOAD_FAST 0 (a) 18 LOAD_FAST 1 (b) 20 COMPARE_OP 8 (is) 22 POP_TOP 24 LOAD_CONST 0 (None) 26 RETURN_VALUE 从字节码可以看出来,is 和 == 都是交给 COMPARE_OP 来执行的,通过 oparg(== 是 2,is 是 8) 参数执行不同的处理,顺藤摸瓜,我们来到 COMPARE_OP: TARGET

关于字典的应用

百般思念 提交于 2020-08-07 19:01:55
1.字典排序 利用key排序 d = {'d1':2, 'd2':4, 'd4':1,'d3':3,} for k in sorted(d): print(k,d[k]) d1 2 d2 4 d3 3 d4 1 利用value排序: __getitem__ d = {'d1':2, 'd2':4, 'd4':1,'d3':3,} for k in sorted(d,key=d.__getitem__): print(k,d[k]) d4 1 d1 2 d3 3 d2 4 反序: reverse=True d = {'d1':2, 'd2':4, 'd4':1,'d3':3,} for k in sorted(d,key=d.__getitem__,reverse=True): print(k,d[k]) d2 4 d3 3 d1 2 d4 1 对dict_items进行排序 d = {'d1':2, 'd2':4, 'd4':1,'d3':3,} res = sorted(d.items(),key=lambda d:d[1],reverse=True) print(res) 结果: [('d2', 4), ('d3', 3), ('d1', 2), ('d4', 1)] 2.两个字典(dict)合并 dict1 = { "name":"owen", "age": 18 }

jupyter-notebook, ImportError: cannot import name 'Type'

可紊 提交于 2020-08-07 05:53:38
问题 I am a Windows user, and I have installed Python 3.6 on my computer. In order to use Jupyter notebooks, I downloaded atom. I already installed ipython and pandas. After entering the command jupyter notebook on the command-line, my browser doesn't open jupyter notebook, instead I get the follow error message: [C:\Users\ELIDAD>jupyter notebook Traceback (most recent call last): File "c:\users\elidad\appdata\local\programs\python\python35\lib\runpy.py", line 170, in _run_module_as_main "__main__

How can I display a <IPython.core.display.HTML object> in spyder IPython console?

青春壹個敷衍的年華 提交于 2020-08-04 09:10:07
问题 I am trying to run the code: perm = PermutationImportance(clf).fit(X_test, y_test) eli5.show_weights(perm) to get an idea of which features are the most important in a model, but the output is <IPython.core.display.HTML object> Any solutions or workarounds to this problem? Thank you for your suggestions! 回答1: ( Spyder maintainer here ) There are no workarounds nor solutions available at the moment (February 2019) to display web content in our consoles, sorry. Note : We are considering how to

Python Jupyter - Change default font

北城余情 提交于 2020-08-01 09:52:49
问题 I want to change the default font (to Gill sans) that displays in Jupyter, but am having problems knowing where I go to edit it. I have looked in the .ipython folder and I have no Static folder, and I have looked in the .jupyter folder and it is empty. Does anyone know? 回答1: You can modify the styles of Jupyter notebook by adding values to the file in; .jupyter\custom\custom.css If the custom dir isn't in .jupyter just make it and add custom.css in it. In your new blank custom.css file you

IPython Notebook: how to display() multiple objects without newline

北战南征 提交于 2020-08-01 09:44:45
问题 Currently when I use display() function in the IPython notebook I get newlines inserted between objects: >>> display('first line', 'second line') first line second line But I would like the print() function's behaviour where everything is kept on the same line, e.g.: >>> print("all on", "one line") all on one line Is there a method of changing display behaviour to do this? 回答1: No, display cannot prevent newlines, in part because there are no newlines to prevent. Each displayed object gets