On: Bpython is a fancy interface to the Python interpreter

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The code that generates the completions [1] and displays them [2] is fairly simple. It uses a mix of scanning for a function's docstring, Python's built-in rlcompleter module [3] to generate the possible identifiers and keywords, its own module scanner for imports [4].

[1] https://bitbucket.org/bobf/bpython/src/2b3fb2cb6500/bpython/...

[2] https://bitbucket.org/bobf/bpython/src/2b3fb2cb6500/bpython/...

[3] http://docs.python.org/library/rlcompleter.html

[4] https://bitbucket.org/bobf/bpython/src/2b3fb2cb6500/bpython/...

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That's very useful. I wish shells like bash/zsh had this instant auto-completion!