ImportError with tab completion

[emmanuelle]

How to reproduce:

• fresh pip env with python 3.7
• pip install ipython and jupyter
• install development version of plotly (master)
  Inside ipython, do import plotly. and hit tab

@jonmmease probably related to the import optimization PR?

In [2]: import plotly.                                                           
Traceback (most recent call last):
  File "/home/emma/sandbox/venv_new/bin/ipython3", line 10, in <module>
    sys.exit(start_ipython())
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/IPython/__init__.py", line 126, in start_ipython
    return launch_new_instance(argv=argv, **kwargs)
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/traitlets/config/application.py", line 664, in launch_instance
    app.start()
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/IPython/terminal/ipapp.py", line 356, in start
    self.shell.mainloop()
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/IPython/terminal/interactiveshell.py", line 558, in mainloop
    self.interact()
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/IPython/terminal/interactiveshell.py", line 541, in interact
    code = self.prompt_for_code()
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/IPython/terminal/interactiveshell.py", line 469, in prompt_for_code
    **self._extra_prompt_options())
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/prompt_toolkit/shortcuts/prompt.py", line 994, in prompt
    return self.app.run(set_exception_handler=set_exception_handler)
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/prompt_toolkit/application/application.py", line 812, in run
    self.run_async(pre_run=pre_run, set_exception_handler=set_exception_handler)
  File "/usr/lib/python3.7/asyncio/base_events.py", line 584, in run_until_complete
    return future.result()
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/prompt_toolkit/application/application.py", line 778, in run_async
    return await _run_async2()
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/prompt_toolkit/application/application.py", line 766, in _run_async2
    await self.cancel_and_wait_for_background_tasks()
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/prompt_toolkit/application/application.py", line 867, in cancel_and_wait_for_background_tasks
    await task
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/prompt_toolkit/buffer.py", line 1854, in new_coroutine
    await coroutine(*a, **kw)
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/prompt_toolkit/buffer.py", line 1684, in async_completer
    document, complete_event
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/prompt_toolkit/completion/base.py", line 270, in get_completions_async
    document, complete_event
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/prompt_toolkit/completion/base.py", line 196, in get_completions_async
    for item in self.get_completions(document, complete_event):
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/IPython/terminal/ptutils.py", line 92, in get_completions
    yield from self._get_completions(body, offset, cursor_position, self.ipy_completer)
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/IPython/terminal/ptutils.py", line 102, in _get_completions
    for c in completions:
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/IPython/core/completer.py", line 438, in _deduplicate_completions
    completions = list(completions)
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/IPython/core/completer.py", line 1819, in completions
    for c in self._completions(text, offset, _timeout=self.jedi_compute_type_timeout/1000):
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/IPython/core/completer.py", line 1863, in _completions
    full_text=full_text, cursor_line=cursor_line, cursor_pos=cursor_column)
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/IPython/core/completer.py", line 2060, in _complete
    custom_res = [(m, 'custom') for m in self.dispatch_custom_completer(text) or []]
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/IPython/core/completer.py", line 1747, in dispatch_custom_completer
    res = c(event)
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/IPython/core/completerlib.py", line 256, in module_completer
    return module_completion(event.line)
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/IPython/core/completerlib.py", line 233, in module_completion
    completion_list = try_import('.'.join(mod[:-1]), True)
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/IPython/core/completerlib.py", line 172, in try_import
    completions.extend( [attr for attr in dir(m) if
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/IPython/core/completerlib.py", line 173, in <listcomp>
    is_importable(m, attr, only_modules)])
  File "/home/emma/sandbox/venv_new/lib/python3.7/site-packages/IPython/core/completerlib.py", line 153, in is_importable
    return inspect.ismodule(getattr(module, attr))
  File "/home/emma/code/plotly.py/packages/python/plotly/_plotly_utils/importers.py", line 29, in __getattr__
    return importlib.import_module(rel_import, parent_name)
  File "/usr/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/emma/code/plotly.py/packages/python/plotly/plotly/express/__init__.py", line 12, in <module>
    Plotly express requires pandas to be installed."""
ImportError: Plotly express requires pandas to be installed.

If you suspect this is an IPython 7.13.0 bug, please report it at:
    https://github.com/ipython/ipython/issues
or send an email to the mailing list at [email protected]

You can print a more detailed traceback right now with "%tb", or use "%debug"
to interactively debug it.

Extra-detailed tracebacks for bug-reporting purposes can be enabled via:
    %config Application.verbose_crash=True

[jonmmease]

Thanks for reporting this @emmanuelle. I'm assuming this happened in an environment without pandas installed. Is that right?

Can you see if #2390 takes care of the issue? Thanks!

[emmanuelle]

closed by #2390.