Producing import graphs listing all imported names matching search
=========================================================================

findimports can produce a detailed list of all imported names

    >>> from findimports import main
    >>> exitcode = main(['findimports', '--search-import', 'box', sample_tree])
    apple:
    <BLANKLINE>
    box.__init__:
    <BLANKLINE>
    box.cat:
      box.yarn
    box.decoy:
    <BLANKLINE>
    box.yarn:
    <BLANKLINE>
    decoy:
    <BLANKLINE>
    orange:
    <BLANKLINE>

findimports can produce a detailed list of all imported names

    >>> from findimports import main
    >>> exitcode = main(['findimports', '--search-import', 'box.yarn', sample_tree])
    apple:
    <BLANKLINE>
    box.__init__:
    <BLANKLINE>
    box.cat:
      box.yarn
    box.decoy:
    <BLANKLINE>
    box.yarn:
    <BLANKLINE>
    decoy:
    <BLANKLINE>
    orange:
    <BLANKLINE>
