ipython自动补全

有利于jupyter notebook的自动补全

命令行中输入：ipython profile create

以上命令会在~/.ipython/profile_default/目录下生成ipython_config.py和ipython_kernel_config.py

我们需要修改（ipython_config.py）的以下几行，将开启补全功能：

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## Activate greedy completion PENDING DEPRECTION. this is now mostly taken care
#  of with Jedi.
#
#  This will enable completion on elements of lists, results of function calls,
#  etc., but can be unsafe because the code is actually evaluated on TAB.
c.Completer.greedy = True
## Experimental: restrict time (in milliseconds) during which Jedi can compute
#  types. Set to 0 to stop computing types. Non-zero value lower than 100ms may
#  hurt performance by preventing jedi to build its cache.
c.Completer.jedi_compute_type_timeout = 400
## Experimental: Use Jedi to generate autocompletions. Off by default.
c.Completer.use_jedi = True