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- # -*- coding: utf-8 -*-
-
- # Copyright (c) 2008/2013 Andrey Vlasovskikh
- #
- # Permission is hereby granted, free of charge, to any person obtaining
- # a copy of this software and associated documentation files (the
- # "Software"), to deal in the Software without restriction, including
- # without limitation the rights to use, copy, modify, merge, publish,
- # distribute, sublicense, and/or sell copies of the Software, and to
- # permit persons to whom the Software is furnished to do so, subject to
- # the following conditions:
- #
- # The above copyright notice and this permission notice shall be included
- # in all copies or substantial portions of the Software.
- #
- # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- # IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
- # CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
- # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
- # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-
- def pretty_tree(x, kids, show):
- """(a, (a -> list(a)), (a -> str)) -> str
-
- Returns a pseudographic tree representation of x similar to the tree command
- in Unix.
- """
- (MID, END, CONT, LAST, ROOT) = ('|-- ', '`-- ', '| ', ' ', '')
-
- def rec(x, indent, sym):
- line = indent + sym + show(x)
- xs = kids(x)
- if len(xs) == 0:
- return line
- else:
- if sym == MID:
- next_indent = indent + CONT
- elif sym == ROOT:
- next_indent = indent + ROOT
- else:
- next_indent = indent + LAST
- syms = [MID] * (len(xs) - 1) + [END]
- lines = [rec(x, next_indent, sym) for x, sym in zip(xs, syms)]
- return '\n'.join([line] + lines)
-
- return rec(x, '', ROOT)
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