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Description:

ipythonautoimport 0.5

Automagically import missing modules in IPython: instead of
In [1]: plt.plot([1, 2], [3, 4])
---------------------------------------------------------------------------
NameError Traceback (most recent call last)
<ipython-input-1-994ba2bf13c0> in <module>()
----> 1 plt.plot([1, 2], [3, 4])

NameError: name 'plt' is not defined

In [2]: from matplotlib import pyplot as plt

In [3]: plt.plot([1, 2], [3, 4])
Out[3]: [<matplotlib.lines.Line2D at 0x7f73f0179198>]
do what I mean:
In [1]: plt.plot([1, 2], [3, 4])
Autoimport: from matplotlib import pyplot as plt
Out[1]: [<matplotlib.lines.Line2D at 0x7f7e253552b0>]
Inspired from @OrangeFlash81’s version, with many
improvements:

Does not rely on re-execution, but instead hooks the user namespace; thus,
safe even in the presence of side effects, and works for tab completion and
magics too.
Learns your preferred aliases from the history – plt is not hardcoded to
alias matplotlib.pyplot, just found because you previously imported
pyplot under this alias.
Suppresses irrelevant chained tracebacks.
Auto-imports submodules.
pip-installable.

To see auto imports from the current session: %autoimport -l
To clear the cache for a symbol with multiple possible imports: %autoimport -c SYMBOL

Installation
As usual, install using pip:
$ pip install ipython-autoimport # from PyPI
$ pip install git+https://github.com/anntzer/ipython-autoimport # from Github
Then, append the output of python -m ipython_autoimport to the
ipython_config.py file in the directory printed by ipython profile locate (typically ~/.ipython/profile_default/). If you don’t have such a
file at all, first create it with ipython profile create.
When using Spyder, the above registration method will not work; instead, add
%load_ext ipython_autoimport to the
Preferences → IPython console → Startup → Run code option.
Note that upon loading, ipython_autoimport will register its submodule
auto-importer to IPython’s “limited evalutation” completer policy (on IPython
versions that support it).
Run tests with pytest.

Limitations
Constructs such as
class C:
auto_imported_value
will not work, because they are run using the class locals (rather than the
patched locals); patching globals would not work because LOAD_NAME queries
globals using PyDict_GetItem exactly (note that it queries locals using
PyObject_GetItem; also, LOAD_GLOBALS queries both globals and
builtins using PyObject_GetItem so we could possibly get away with patching
the builtins dict instead, but that seems a bit too invasive…).
When using Jedi autocompletion (the default if Jedi is installed as of IPython
7.2), trying to tab-complete not-yet-imported global names to trigger an import
failure, because Jedi purposefully converts the global dict to a namespace
object and looks up attributes using getattr_static. Jedi can be disabled
by adding c.Completer.use_jedi = False to the ipython_config.py file.

Changelog
v0.5

Avoid erroring when exiting IPython≥8.15.