Tab completion fails on regular imports when using InteractiveShellEmbed

[clebio]

Using IPython.terminal.embed.InteractiveShellEmbed as an embedded, interactive shell, I cannot get regular importing to tab-complete. Once a package (say netrc) is imported, I can still tab-complete the package, though.

To wit, create a test file sheller.py:

from cli.app import CommandLineApp
from IPython.terminal.embed import InteractiveShellEmbed


class Manager(CommandLineApp):

    def setup(self):
        super(Manager, self).setup()
        self.intro_message = 'Context manager running'

    def main(self):
        ipshell = InteractiveShellEmbed()
        ipshell.banner2 = self.intro_message
        ipshell(global_ns=dict(), local_ns=dict())
        logging.info("Interactive shell closed.")

if __name__ == "__main__":
    Manager().run()

Then, from Bash, run it:

$ python sheller.py
Python 2.7.2 (default, Oct 11 2012, 20:14:37)
Type "copyright", "credits" or "license" for more information.

IPython 1.1.0 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

Context manager running
In : import net<tab> # ...crickets...

In : import netrc # explicit import, not tabbing
In : netrc.<tab>
netrc.NetrcParseError  netrc.netrc            netrc.os               netrc.shlex
In : quit

$ ipython
Python 2.7.2 (default, Oct 11 2012, 20:14:37)
Type "copyright", "credits" or "license" for more information.

IPython 1.1.0 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

In : import net<tab>rc
In : import netrc

This appears to be related to the following issues:

• Autocompletion stops working after creating an InteractiveShellEmbed object
• IPythonShellEmbed fails to recognize local variables
• Names not defined in list comprehension in the IPython shell

[olaurino]

I had a similar issue with InteractiveShell and I am going to open an issue for that.

However, I tested my fix against your code, and it seems to work for your issue as well (the underlying issue is probably the same).

In main, change the way you instantiate InteractiveShellEmbed as follows:

ipshell = InteractiveShellEmbed.instance()

I tested this on Linux with different versions of IPython 1.x and 2.x.

[clebio]

Aweome sauce! That fixes it. Confirmed on OSX 10.8.5, IPython 2.3.0.