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