Mercurial > hg > config
annotate python/tree.py @ 644:b4dc72b7c5c3
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| author | Jeff Hammel <k0scist@gmail.com> |
|---|---|
| date | Tue, 11 Mar 2014 14:38:35 -0700 |
| parents | fbb5b143349a |
| children | 93dc0507ab3b |
| rev | line source |
|---|---|
| 382 | 1 #!/usr/bin/env python |
| 2 # -*- coding: utf-8 -*- | |
| 3 | |
| 4 """ | |
| 5 tree in python | |
| 6 """ | |
| 7 | |
| 425 | 8 # TODO: script2package |
| 9 | |
| 382 | 10 import optparse |
| 11 import os | |
| 12 import sys | |
| 13 | |
| 387 | 14 # ASCII delimeters |
| 388 | 15 ascii_delimeters = { |
| 389 | 16 'vertical_line' : '|', |
| 17 'item_marker' : '+', | |
| 18 'last_child' : '\\' | |
| 388 | 19 } |
| 387 | 20 |
| 21 # unicode delimiters | |
| 389 | 22 unicode_delimeters = { |
| 23 'vertical_line' : '│', | |
| 24 'item_marker' : '├', | |
| 25 'last_child' : '└' | |
| 26 } | |
| 382 | 27 |
| 425 | 28 |
| 382 | 29 def depth(directory): |
| 387 | 30 """returns the integer depth of a directory or path relative to '/' """ |
| 31 | |
| 382 | 32 directory = os.path.abspath(directory) |
| 33 level = 0 | |
| 34 while True: | |
| 35 directory, remainder = os.path.split(directory) | |
| 36 level += 1 | |
| 37 if not remainder: | |
| 38 break | |
| 39 return level | |
| 40 | |
| 425 | 41 |
| 42 ### stuff for tree generalization | |
| 43 | |
| 44 class Tree(object): | |
| 45 """tree structure in python""" | |
| 46 | |
| 47 def __init__(self, parent=None): | |
| 48 self.parent = parent | |
| 426 | 49 self._children = [] |
| 425 | 50 |
| 51 def children(self): | |
| 52 """returns children of the tree""" | |
| 426 | 53 return self._children # base implementation |
| 425 | 54 |
| 55 def add(self, item): | |
| 56 """add a child to the tree root""" | |
| 57 | |
| 58 def update(self, tree): | |
| 59 """add a subtree to the tree""" | |
| 60 self.add(tree) | |
| 61 tree.parent = self # XXX .add should probably do this for scary reasons | |
| 62 | |
| 63 def output(self, serializer): | |
| 64 """output the tree via the given serializer""" | |
| 65 # XXX or should this method exist at all and instead the | |
| 66 # __call__ method of serializers take a Tree object? | |
| 67 | |
| 68 class DirectoryTree(Tree): | |
| 69 """directory structure as a tree""" | |
| 70 | |
| 429 | 71 def __init__(self, directory): |
| 72 self.directory = directory | |
| 73 self._return_type = os.path.abspath | |
| 74 | |
| 75 def children(self): | |
| 76 return os.listdir(self.directory) # -> self._return_type | |
| 77 | |
| 78 ## Serializers | |
| 79 | |
| 443 | 80 def tree2html(tree): |
| 81 """ | |
| 82 . | |
| 83 ├── a8e.py | |
| 84 ├── abstract.py | |
| 85 ├── accentuate.py | |
| 86 | |
| 87 -> | |
| 88 | |
| 89 <ul> | |
| 90 <li>a8e.py</li> | |
| 91 ... | |
| 92 """ | |
| 93 | |
| 94 | |
| 429 | 95 # How to serialize a tree -> JSON? |
| 96 | |
| 425 | 97 ### |
| 98 | |
| 388 | 99 def tree(directory, |
| 389 | 100 item_marker=unicode_delimeters['item_marker'], |
| 101 vertical_line=unicode_delimeters['vertical_line'], | |
| 102 last_child=unicode_delimeters['last_child'], | |
| 388 | 103 sort_key=lambda x: x.lower()): |
| 104 """ | |
| 105 display tree directory structure for `directory` | |
| 106 """ | |
|
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107 |
| 385 | 108 retval = [] |
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109 indent = [] |
| 384 | 110 last = {} |
| 386 | 111 top = depth(directory) |
| 112 | |
| 382 | 113 for dirpath, dirnames, filenames in os.walk(directory, topdown=True): |
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114 |
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115 abspath = os.path.abspath(dirpath) |
| 384 | 116 basename = os.path.basename(abspath) |
| 117 parent = os.path.dirname(abspath) | |
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118 level = depth(abspath) - top |
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119 |
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120 # sort articles of interest |
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121 for resource in (dirnames, filenames): |
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122 resource[:] = sorted(resource, key=sort_key) |
| 382 | 123 |
| 389 | 124 files_end = item_marker |
| 125 dirpath_marker = item_marker | |
| 385 | 126 |
| 127 if level > len(indent): | |
| 389 | 128 indent.append(vertical_line) |
| 385 | 129 indent = indent[:level] |
| 130 | |
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131 if dirnames: |
| 389 | 132 files_end = item_marker |
| 385 | 133 last[abspath] = dirnames[-1] |
| 134 else: | |
| 389 | 135 files_end = last_child |
| 384 | 136 |
| 385 | 137 if last.get(parent) == os.path.basename(abspath): |
| 138 # last directory of parent | |
| 389 | 139 dirpath_mark = last_child |
| 385 | 140 indent[-1] = ' ' |
| 141 elif not indent: | |
| 142 dirpath_mark = '' | |
| 143 else: | |
| 389 | 144 dirpath_mark = item_marker |
| 385 | 145 |
| 388 | 146 # append the directory and piece of tree structure |
| 147 # if the top-level entry directory, print as passed | |
| 148 retval.append('%s%s%s'% (''.join(indent[:-1]), | |
| 149 dirpath_mark, | |
| 150 basename if retval else directory)) | |
| 151 # add the files | |
| 385 | 152 if filenames: |
| 153 last_file = filenames[-1] | |
| 387 | 154 retval.extend([('%s%s%s' % (''.join(indent), |
| 389 | 155 files_end if filename == last_file else item_marker, |
| 385 | 156 filename)) |
| 157 for index, filename in enumerate(filenames)]) | |
| 158 | |
| 382 | 159 return '\n'.join(retval) |
| 160 | |
| 161 def main(args=sys.argv[1:]): | |
| 162 | |
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163 # parse command line options |
| 382 | 164 usage = '%prog [options]' |
| 165 parser = optparse.OptionParser(usage=usage, description=__doc__) | |
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166 parser.add_option('-a', '--ascii', dest='use_ascii', |
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167 action='store_true', default=False, |
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168 help="use ascii delimeters (%s)" % ascii_delimeters) |
| 382 | 169 options, args = parser.parse_args(args) |
| 170 if not args: | |
| 171 args = ['.'] | |
| 172 | |
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173 # sanity check |
| 382 | 174 not_directory = [arg for arg in args |
| 175 if not os.path.isdir(arg)] | |
| 176 if not_directory: | |
| 177 parser.error("Not a directory: %s" % (', '.join(not_directory))) | |
| 178 | |
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179 delimeters = unicode_delimeters |
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180 if options.use_ascii: |
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181 delimeters = ascii_delimeters |
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182 |
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183 # print the tree |
| 382 | 184 for arg in args: |
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185 print (tree(arg, **delimeters)) |
| 382 | 186 |
| 187 if __name__ == '__main__': | |
| 188 main() |