如果不列出一個目錄，并將要查找的項和目錄中的每個項都轉換為一個常見的案例進行比較，則無法執行此操作。文件系統是區分大小寫的，這就是它的全部功能。def path_insensitive(path):

"""

Get a case-insensitive path for use on a case sensitive system.

>>> path_insensitive('/Home')

'/home'

>>> path_insensitive('/Home/chris')

'/home/chris'

>>> path_insensitive('/HoME/CHris/')

'/home/chris/'

>>> path_insensitive('/home/CHRIS')

'/home/chris'

>>> path_insensitive('/Home/CHRIS/.gtk-bookmarks')

'/home/chris/.gtk-bookmarks'

>>> path_insensitive('/home/chris/.GTK-bookmarks')

'/home/chris/.gtk-bookmarks'

>>> path_insensitive('/HOME/Chris/.GTK-bookmarks')

'/home/chris/.gtk-bookmarks'

>>> path_insensitive("/HOME/Chris/I HOPE this doesn't exist")

"/HOME/Chris/I HOPE this doesn't exist"

"""

return _path_insensitive(path) or path

def _path_insensitive(path):

"""

Recursive part of path_insensitive to do the work.

"""

if path == '' or os.path.exists(path):

return path

base = os.path.basename(path) # may be a directory or a file

dirname = os.path.dirname(path)

suffix = ''

if not base: # dir ends with a slash?

if len(dirname) < len(path):

suffix = path[:len(path) - len(dirname)]

base = os.path.basename(dirname)

dirname = os.path.dirname(dirname)

if not os.path.exists(dirname):

dirname = _path_insensitive(dirname)

if not dirname:

return

# at this point, the directory exists but not the file

try: # we are expecting dirname to be a directory, but it could be a file

files = os.listdir(dirname)

except OSError:

return

baselow = base.lower()

try:

basefinal = next(fl for fl in files if fl.lower() == baselow)

except StopIteration:

return

if basefinal:

return os.path.join(dirname, basefinal) + suffix

else:

return

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