Zoom Jupyter tips
Zoom session 3, part 2
Topic: Tips while working in Jupyter, some of which specific to fastai.
Summary
Jupyter comes with a couple of convenient functionalities.
The fastai library adds a few more to that.
Here, I am using the fastai convenience function untar_data (which downloads and extract datasets from urls) as example.
If you want to run these snippets, make sure that you have already loaded that function, for instance by running:
from fastai.vision.all import *Help (also in Python shell)
help is a Python built-in function (it is a wrapper around pydoc.help) which provides some help on code elements (functions, etc.). While other tips presented here only work on Jupyter, this also works in the Python shell:
help(untar_data)Autocompletion
Pressing Tab after a few characters of code autocompletes or displays available options.
Function arguments
Pressing Shift+Tab inside the parentheses of a function opens a popup showing all the function arguments and their default values (if any).
Information
In Jupyter, you can access information on a Python element by prepending or appending a question mark to it:
?untar_data
untar_data?Source code
By using two question marks, you can see the source code:
??untar_data
untar_data??High-level description & link to online documentation (fastai only)
A convenient way to access the online documentation page of any fastai code element is to use the fastai function doc:
doc(untar_data)