copy from https://jupyter.org/install Getting started with JupyterLab Installation JupyterLab can be installed using conda or pip. For more detailed instructions, consult the installation guide. conda If you use conda, you can install it with: conda
python中没有其他语言中的三元表达式,不过有类似的实现方法 其他语言中,例如java的三元表达式是这样 int a = 1; String b = ""; b = a > 1? "执行表达式1":"执行表达式2" System.out.println(b) 在python中只有类似的替代办法,如果a>b的结果为真,h="变量1",如果为假,h="变量2" a = 1 b = 2 h = &q