我假设问题更多是因为能够区分磁盘上的排序文件,而不是知道有关文件名本身的任何特定信息。
如果是这样的话,并且您正在寻找的是足够聪明的东西,可以列出如下列表:
- /path/to/file_1.png
- /path/to/file_2.png
- /path/to/file_3.png
- ...
- /path/to/file_10.png
- /path/to/image_1.png
- /path/to/image_2.png
- ...
- /path/to/image_10.png
并返回一个结果说 - 我有 2 个文件序列: /path/to/file_#.png 和 /path/to/image_#.png 你将需要 2 次通过 - 第一次通过来确定文件的有效表达式,第二遍找出所有其他文件满足该要求。
您还需要知道是否要支持间隙(是否需要连续)
- /path/to/file_1.png
- /path/to/file_2.png
- /path/to/file_3.png
- /path/to/file_5.png
- /path/to/file_6.png
- /path/to/file_7.png
这是 1 个序列 (/path/to/file_#.png) 还是 2 个序列 (/path/to/file_1-3.png, /path/to/file_5-7.png)
另外 - 你想如何处理序列中的数字文件?
- /path/to/file2_1.png
- /path/to/file2_2.png
- /path/to/file2_3.png
等等
考虑到这一点,这就是我将如何完成它:
import os.path
import projex.sorting
import re
def find_sequences( filenames ):
"""
Parse a list of filenames into a dictionary of sequences. Filenames not
part of a sequence are returned in the None key
:param filenames | [<str>, ..]
:return {<str> sequence: [<str> filename, ..], ..}
"""
local_filenames = filenames[:]
sequence_patterns = {}
sequences = {None: []}
# sort the files (by natural order) so we always generate a pattern
# based on the first potential file in a sequence
local_filenames.sort(projex.sorting.natural)
# create the expression to determine if a sequence is possible
# we are going to assume that its always going to be the
# last set of digits that makes a sequence, i.e.
#
# test2_1.png
# test2_2.png
#
# test2 will be treated as part of the name
#
# test1.png
# test2.png
#
# whereas here the 1 and 2 are part of the sequence
#
# more advanced expressions would be needed to support
#
# test_01_2.png
# test_02_2.png
# test_03_2.png
pattern_expr = re.compile('^(.*)(\d+)([^\d]*)$')
# process the inputed files for sequences
for filename in filenames:
# first, check to see if this filename matches a sequence
found = False
for key, pattern in sequence_patterns.items():
match = pattern.match(filename)
if ( not match ):
continue
sequences[key].append(filename)
found = True
break
# if we've already been matched, then continue on
if ( found ):
continue
# next, see if this filename should start a new sequence
basename = os.path.basename(filename)
pattern_match = pattern_expr.match(basename)
if ( pattern_match ):
opts = (pattern_match.group(1), pattern_match.group(3))
key = '%s#%s' % opts
# create a new pattern based on the filename
sequence_pattern = re.compile('^%s\d+%s$' % opts)
sequence_patterns[key] = sequence_pattern
sequences[key] = [filename]
continue
# otherwise, add it to the list of non-sequences
sequences[None].append(filename)
# now that we have grouped everything, we'll merge back filenames
# that were potential sequences, but only contain a single file to the
# non-sequential list
for key, filenames in sequences.items():
if ( key is None or len(filenames) > 1 ):
continue
sequences.pop(key)
sequences[None] += filenames
return sequences
以及一个示例用法:
>>> test = ['test1.png','test2.png','test3.png','test4.png','test2_1.png','test2_2.png','test2_3.png','test2_4.png']
>>> results = find_sequences(test)
>>> results.keys()
[None, 'test#.png', 'test2_#.png']
那里有一种方法是指自然排序,这是一个单独的主题。我刚刚使用了我的 projex 库中的自然排序方法。它是开源的,所以如果您想使用或查看它,请访问:http: //dev.projexsoftware.com/projects/projex
但是该主题已在论坛的其他地方有所涉及,因此仅使用了图书馆中的方法。