IPython Notebook Basics (3) SciPy2013 Tutorial, Part 2 of 3

Здесь пример использования 'from IPython.nbformat import current' из текущего файла считываются содержание первых пяти ячеек в формате json, как распечатать содержание ячеек по индексу... Это начал о видеоролика IPython in Depth, SciPy2013 Tutorial, Part 2 of 3

Project directory¶

• IPython Notebooks are just files (.ipynb) on your file system
• The Notebook server is aware of Notebooks in a single directory, which we call the Notebook directory
• If you cd to a Notebook directory and type:
  

  ipython notebook

you will see the Notebooks in that directory in the dashboard

Notebook files¶

Notebook files:

• Are just that - files (.ipynb) on your file system
• Contain JSON data

In [1]:

from IPython.nbformat import current
with open('00 - Notebook Basics.ipynb') as f:
    nb = current.read(f, 'json')

In [2]:

nb.worksheets[0].cells[0:5]

Out[2]:

[{u'cell_type': u'heading',
  u'level': 1,
  u'metadata': {},
  u'source': u'IPython Notebook Basics'},
 {u'cell_type': u'heading',
  u'level': 2,
  u'metadata': {},
  u'source': u'Project directory'},
 {u'cell_type': u'markdown',
  u'metadata': {},
  u'source': u'* IPython Notebooks are just files (`.ipynb`) on your file system\n* The Notebook server is aware of Notebooks in a single directory, which we call the **Notebook directory**\n* If you cd to a Notebook directory and type:\n\n        ipython notebook\n\n  you will see the Notebooks in that directory in the dashboard'},
 {u'cell_type': u'heading',
  u'level': 2,
  u'metadata': {},
  u'source': u'Notebook files'},
 {u'cell_type': u'markdown',
  u'metadata': {},
  u'source': u'Notebook files:\n\n* Are just that - files (`.ipynb`) on your file system\n* Contain JSON data'}]

• Embed code, Markdown text, LaTeX equations, images
• Are version control friendly: post your Notebooks on GitHub
• Can be viewed online by anyone at http://nbviewer.ipython.org

IPython Notebooks can also be exported to .py files (see "File:Download As" menu item). You can tell the Notebook server to always save these .py files alongside the .ipynb files by starting the Notebook as:

ipython notebook --script

You can import Notebooks from the main Dashboard or simply by copying a Notebook into the Notebook directory.

Exercise¶

Find a Notebook on http://nbviewer.ipython.org and Download it. Then import it into your running Notebook server using the Dashboard.

Overview of the UI¶

• Dashboard
• Notebook area and cells
• Menu
• Toolbar

Cell types¶

• Code
• Markdown
• Raw text
• Heading

Exercise¶

Create a new Notebook that has at least one of each cell type. Practice the following cell operations:

• Moving up/down
• Cut/Copy/Paste
• Merge/Split

Keyboard shortcuts¶

• Shift-Enter to run a cell
• Ctrl-Enter to run a cell in place
• All other keyboard shortcuts have the form: Ctrl-m ?
• Show all keyboard shortcuts using Ctrl-m h

Exercise¶

Go back to that last Notebook and repeat some of those cell operations using keyboard shortcuts:

• Inserting cells above/below
• Delete cell
• Move cell up/down
• Cut/copy/paste cell
• Changing cell types

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