Jupyer Notebook / Lab 유용한 magic 함수들과 ShortCuts(단축키)

• Shift + Enter : 현재 셀 실행
• Ctrl + Enter  : 선택된 셀 모두 실행
• Alt + Enter  : 현재 셀 실행하고 아래에 셀 삽입
• Ctrl + S  : 저장

Shortcuts when in edit mode:

• Esc : command 실행 모드하기 전에 ESC 누르기
• Tab code completion or indent
• Shift + Tab : 도움말
• Ctrl + ] : indent 넣기
• Ctrl + [ : dedent (indent 빼기?)
• Ctrl + A : 전체 선택
• Ctrl + Z : 되돌리기 
• Ctrl + Shift + Z or Ctrl + Y : redo
• Ctrl + Home :  맨 위의 셀로 이동
• Ctrl + End : 맨 아래 셀로 이동
• Ctrl + Left : 한 단어 앞으로 이동
• Ctrl + Right :  한 단어 맨 뒤로 이동

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ESC 누르고 할 수 있는 것들

• Scroll up and down your cells with your Up and Down keys.
• Press A or B to insert a new cell above or below the active cell.
• M will transform the active cell to a Markdown cell.
• Y will set the active cell to a code cell.
• X will cut the selected cell
• C will copy the selected cell
• V will paste the cell which is being copied/cut
• Shift + V paste cells above
• S will save the notebook
• F will find/replace
• O will toggle output
• D + D (D twice) will delete the active cell.
• Z will undo cell deletion.
• For selecting multiple cells at once, hold Shift and press Up or Down
  • Shift + UP UP
  • Shift + Down Down
• Shift + Space scroll notebook up
• Space scroll notebook down

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다중 셀 처리 방법

• Shift + M : 아래 있는 셀과 합치기
• Ctrl + Shift + - : Cell 쪼개기
• You can also click and Shift + Click in the margin to the left of your cells to select them

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shell command 사용하기

앞에 !를 붙이면 됨

!pip install ~~
x = "aa"
!echo $x

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Magic Commands

%pastebin magic function to select a range of cells

%pastebin 1-3

## 'http://dpaste.com/2XNJRCR'

 

• %whos displays the variable type plus some extra info: size, contents, etc.
• %who_ls only displays the variables name

Working with external files within Jupyter Notebook:

• %pycat file.py ➡ opens script in the pager
• %load file.py ➡ inserts the script into a cell
• %run file.py ➡ runs script
• %run file.ipynb ➡ runs notebook
• %notebook filename ➡ exporting the current IPython history to a notebook file

Getting, setting or listing environment variables:

• %env ➡lists all environment variables
• %env var ➡ get value for var
• %env var val➡ set value for var

%system ➡ to use shell (mostly used to get current directory, date, etc)

Autosaving notebook to its checkpoint using %autosave :

Autosaving every 120 seconds (2 minutes)

• %%HTML ➡ to execute HTML code

• %%perl ➡ to execute Perl in a subprocess
• %%javascript or %%js ➡ to execute the block of Javascript code
• %%python3 ➡ to execute code with python3 in a subprocess
• %%ruby ➡ to execute Ruby code

Other magic commands:

• %history ➡ print input history
• %lsmagic ➡ list currently available magic functions
• %magic ➡ print information about the magic function system
• %matplotlib ➡ setting up matplotlib to work interactively
• %pwd ➡ returns current working directory
• %quickref ➡ shows a quick reference sheet
• %time ➡ time execution of a Python statement or expression (it can be used both as a line and cell magic)

https://towardsdatascience.com/optimizing-jupyter-notebook-tips-tricks-and-nbextensions-26d75d502663

Optimizing Jupyter Notebook: Tips, Tricks, and nbextensions