I'm using pattern
"""
!test1/
*.txt
"""

to scan a folder, from gitingore description
(http://git-scm.com/book/en/v2/Git-Basics-Recording-Changes-to-the-Repository)

ignore all files in the build/ directory

build/

this should exclude everything under test1 folder, but the run result shows the line dose not work, the result still show all contents under test 1 folder.

[An Example Folder Structure]
d:\dev\eclipse_workspace\test_scan\src\test1\a.txt
d:\dev\eclipse_workspace\test_scan\src\test1\b.txt
d:\dev\eclipse_workspace\test_scan\src\test1\c\c1.txt
d:\dev\eclipse_workspace\test_scan\src\test2\a.txt
d:\dev\eclipse_workspace\test_scan\src\test2\b.txt
d:\dev\eclipse_workspace\test_scan\src\test2\c\c1.txt

[Code]
SCAN_PATTERN = """
!test1/
*.txt
"""

spec = pathspec.PathSpec.from_lines(pathspec.GitIgnorePattern, SCAN_PATTERN.splitlines())
spec.match_tree('d:\dev\eclipse_workspace\test_scan')

[Run Result]
d:\dev\eclipse_workspace\test_scan\src\test1\a.txt
d:\dev\eclipse_workspace\test_scan\src\test1\b.txt
d:\dev\eclipse_workspace\test_scan\src\test1\c\c1.txt
d:\dev\eclipse_workspace\test_scan\src\test2\a.txt
d:\dev\eclipse_workspace\test_scan\src\test2\b.txt
d:\dev\eclipse_workspace\test_scan\src\test2\c\c1.txt

Can you please have a look? Thanks.