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Add IPython-specific session dump and load capability #103

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Add IPython-specific session dump and load capability #103

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Commits on May 31, 2015

  1. dump_session: add byref_{filter,discard_missing} 

    byref_filter allows the caller to supply a function that determines
whether a given name should be pickled byref. This permits white- or
black-listing of imported items.

byref_discard_missing specifies whether names marked by the byref_filter
which cannot be found should be silently discarded. This allows
dynamically-generated items to be specifically excluded.
    @abrasive
    abrasive committed May 31, 2015
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  2. add dump_ipython, load_ipython for IPython sessions 

    These use the byref filtering mechanism to avoid pickling hidden items
from the namespace. In Pylab or Matplotlib mode, this covers the
implicit "from x import *". Items that cannot be found are silently
discarded, which takes care of dynamically generated classes such as
those from GObject which get thoughtlessly plunked into __main__ by the
GTK backend.

This also restores the hidden namespace after loading, ensuring that
IPython's special handling of them in %who and so forth remains
effective.
    @abrasive
    abrasive committed May 31, 2015
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