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.. _integrating:
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=====================================
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Integrating your objects with IPython
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=====================================
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Tab completion
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==============
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To change the attributes displayed by tab-completing your object, define a
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``__dir__(self)`` method for it. For more details, see the documentation of the
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built-in `dir() function <http://docs.python.org/library/functions.html#dir>`_.
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Rich display
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============
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The notebook and the Qt console can display richer representations of objects.
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To use this, you can define any of a number of ``_repr_*_()`` methods. Note that
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these are surrounded by single, not double underscores.
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Both the notebook and the Qt console can display ``svg``, ``png`` and ``jpeg``
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representations. The notebook can also display ``html``, ``javascript``,
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and ``latex``. If the methods don't exist, or return ``None``, it falls
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back to a standard ``repr()``.
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For example::
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class Shout(object):
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def __init__(self, text):
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self.text = text
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def _repr_html_(self):
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return "<h1>" + self.text + "</h1>"
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Custom exception tracebacks
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===========================
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Rarely, you might want to display a different traceback with an exception -
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IPython's own parallel computing framework does this to display errors from the
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engines. To do this, define a ``_render_traceback_(self)`` method which returns
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a list of strings, each containing one line of the traceback.
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Please be conservative in using this feature; by replacing the default traceback
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you may hide important information from the user.
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