help with command?

[messense]

i.e. <command>? translates to help <command> like what IPython does:

In [1]: import os

In [2]: os.mkdir?
Signature: os.mkdir(path, mode=511, *, dir_fd=None)
Docstring:
Create a directory.

If dir_fd is not None, it should be a file descriptor open to a directory,
  and path should be relative; path will then be relative to that directory.
dir_fd may not be implemented on your platform.
  If it is unavailable, using it will raise a NotImplementedError.

The mode argument is ignored on Windows.
Type:      builtin_function_or_method

[laixintao]

make sense, since the iredis and ipython shares the same "project name" pattern.

I will give it a try.