@vimh.export()
def cmdline_complete(arglead, cmdline, cursorpos):
    sources_and_options = list(option.format_options(option.default_options.keys())) + sources.__all__
    return filter(lambda x: x.startswith(arglead), sources_and_options)
:h :command-completion-customlist
dataset/ETHPy150Open azure-satellite/pyunite/pyunite/core.py/cmdline_complete