使用快捷键

熟练使用快捷键能大幅提升开发效率

查看快捷键清单：

Help->Keyboard Shortcuts

The Jupyter Notebook has two different keyboard input modes. Edit mode allows you to type code/text into a cell and is indicated by a green cell border. Command mode binds the keyboard to notebook level actions and is indicated by a grey cell border with a blue left margin.

Jupyter 有两种模式，编辑模式和命令模式，以后可以在命令模式下直接按 H 来查看快捷键清单

学习Markdown

学会 Markdown 可以边学边记

下面看看 Markdown 能干些什么

用LaTeX写公式

$J(\theta_0,\theta_1)=\frac{1}{2m}$

显示代码

print('hello python')

显示HTML

A	星期二	星期三
李强	张明	王平

问号(?)

? 显示文档
??显示源码（如果有）
用于搜索



In [1]:

    
print?
# 等同
# ?print



In [2]:

    
pwd??
# 等同
# ??pwd
# ??%pwd
# %pwd??



In [3]:

    
p*?
# 等同
# ?p*

叹号(!)

执行shell命令



In [4]:

    
!pwd









    



/Users/suconglin/Projects/GitHub/hello-python/jupter

百分号(%)

魔法命令 magic command

下面简单介绍一下

查看所有魔法命令



In [5]:

    
%magic

调试程序



In [6]:

    
def test():
    raise NotImplementedError()

test()









    



---------------------------------------------------------------------------
NotImplementedError                       Traceback (most recent call last)
<ipython-input-6-5c39f7bbfc81> in <module>()
      2     raise NotImplementedError()
      3 
----> 4 test()

<ipython-input-6-5c39f7bbfc81> in test()
      1 def test():
----> 2     raise NotImplementedError()
      3 
      4 test()

NotImplementedError:



In [7]:

    
%pdb on









    



Automatic pdb calling has been turned ON



In [8]:

    
test()









    



---------------------------------------------------------------------------
NotImplementedError                       Traceback (most recent call last)
<ipython-input-8-ea594c21b25d> in <module>()
----> 1 test()

<ipython-input-6-5c39f7bbfc81> in test()
      1 def test():
----> 2     raise NotImplementedError()
      3 
      4 test()

NotImplementedError: 





    



> <ipython-input-6-5c39f7bbfc81>(2)test()
      1 def test():
----> 2     raise NotImplementedError()
      3 
      4 test()

ipdb> exit



In [9]:

    
%pdb off









    



Automatic pdb calling has been turned OFF

计时



In [10]:

    
%timeit pass









    



100000000 loops, best of 3: 11.5 ns per loop