The jupyter notebook interface has a bunch of shortcuts that you can use, but they are not well documented in the webinterface.
| Shortcut | Description |
|---|---|
| Enter | Enter edit mode |
| Esc | Enter command mode (escape edit mode) |
| Tab | Autocompletion |
| Shift-Enter | Run cell, select below |
| Ctrl-Enter | Run cell |
| y | Convert to code cell |
| m | Convert to markdown cell |
| a | Insert new cell above |
| b | Insert new cell below |
| dd | Delete cell |
There are a lot more schortcuts: (https://sowingseasons.com/blog/reference/2016/01/jupyter-keyboard-shortcuts/23298516)[]
In [4]:
# Use a question mark after a command to get more info about it
a = [1, 2, 3]
a.extend?
In [5]:
# Use double question marks to get the source code if available
def myfunc(x):
""" Fancy function """
return x + 2
myfunc?
In [6]:
myfunc??
In [3]:
# Magic commands start with a % sign
%timeit print "foo"
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10000 loops, best of 3: 98 µs per loop
In [7]:
# You can add parameters to magic commands, just like you would do for commandline commands
%timeit -n 5 print "foo" # Only do 5 loops, instead of the default 10k
foo
foo
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5 loops, best of 3: 117 µs per loop
In [8]:
# You can also ask for help for magic commands using the question mark
%timeit?
In [9]:
# See a quick reference of other commands:
%quickref
In [50]:
# There are a lot more specicial commands
%ls # same as linux ls command: list files in directory
NumPy.ipynb ipython.ipynb pandas.ipynb
Pandas - Series and Dataframes.ipynb myscript.py
In [37]:
# Run an external script
%run myscript.py
This is my script
In [38]:
# If you forget to store the result of your last statement in a variable,
# you can always access it using the special underscore variable, like so:
5+3
Out[38]:
8
In [39]:
_
Out[39]:
8
In [42]:
# You can also access previous results by referencing the output number using _X
# where X is the output cell you want to reference:
_39
Out[42]:
8
In [44]:
# Or the input number using _iX
_i36
Out[44]:
u'# There are a lot more specicial commands\n%ls'
In [45]:
# You can also easily execute OS commands using !
!ls -lh
total 12088
-rw-r--r-- 1 jroovers staff 5.9M Mar 4 15:01 ipython.ipynb
-rw-r--r-- 1 jroovers staff 26B Mar 4 14:54 myscript.py
-rw-r--r-- 1 jroovers staff 11K Mar 4 10:29 pandas.ipynb
In [52]:
output = !ls -lh
output
Out[52]:
['total 12136',
'-rw-r--r-- 1 jroovers staff 12K Mar 4 15:53 NumPy.ipynb',
'-rw-r--r-- 1 jroovers staff 3.8K Mar 4 16:06 Pandas - Series and Dataframes.ipynb',
'-rw-r--r-- 1 jroovers staff 5.9M Mar 4 15:14 ipython.ipynb',
'-rw-r--r-- 1 jroovers staff 26B Mar 4 14:54 myscript.py',
'-rw-r--r-- 1 jroovers staff 11K Mar 4 10:29 pandas.ipynb']
In [48]:
# You can reference other variables by prefixing them by a dollar sign $
dirname = "/tmp"
!ls $dirname
56d550e51aab6 com.apple.launchd.y8ogE3ULyF webex
Atom Crashes commits-245-release.txt wifi-36YRZk.log
KSDownloadAction.4EhMuz1AfI getMinUserProfileResponse.xml wifi-DNh9xp.log
KSInstallAction.SSG6Lnrtww getMinUserProfilerequest.txt wifi-FUQg40.log
KSOutOfProcessFetcher.0.ppfIhqX0vjaTSb8AJYobDV7Cu68= logs wifi-JEDxLv.log
KSOutOfProcessFetcher.0.sAglCyxY5lzPoNgfmEvv-ZqGl-w= progress.log wifi-QEr3aD.log
KSOutOfProcessFetcher.501.ppfIhqX0vjaTSb8AJYobDV7Cu68= test-repo wifi-QIscKe.log
KSOutOfProcessFetcher.501.sAglCyxY5lzPoNgfmEvv-ZqGl-w= test.txt wifi-Qlomz7.log
KSOutOfProcessFetcher.6yWEj9aBUR wbxtra_03032016_170458.wbt wifi-Qq0TMR.log
ca.crt wbxtra_03032016_221211.wbt wifi-WnpGE7.log
change.txt wbxtra_03042016_093540.wbt wifi-gROB44.log
com.apple.launchd.AV9f2JeEvY wbxtra_03042016_104227_gpc.wbt wifi-sDG1Mf.log
com.apple.launchd.VENbOI7NIR wbxtra_03042016_104231.wbt
In [ ]:
Content source: jorisroovers/machinelearning-playground
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