在python中,假设我有一个这样的路径:

/folderA/folderB/folderC/folderD/

我怎样才能得到folderD部分?


你可以这样做

>>> import os
>>> os.path.basename('/folderA/folderB/folderC/folderD')

UPDATE1:如果你给它/folderA/folderB/folderC/folderD/xx.py,这种方法是有效的。这将xx.py作为基名。我猜这不是你想要的。所以你可以这样做-

>>> import os
>>> path = "/folderA/folderB/folderC/folderD"
>>> if os.path.isdir(path):
        dirname = os.path.basename(path)

UPDATE2:正如lars指出的那样,进行更改以适应以'/'结尾。

>>> from os.path import normpath, basename
>>> basename(normpath('/folderA/folderB/folderC/folderD/'))
'folderD'

path = "/folderA/folderB/folderC/folderD/"
last = path.split('/').pop()

str = "/folderA/folderB/folderC/folderD/"
print str.split("/")[-2]

使用os.path。Normpath,然后os.path.basename:

>>> os.path.basename(os.path.normpath('/folderA/folderB/folderC/folderD/'))
'folderD'

第一个函数去掉任何尾随的斜杠,第二个函数给出路径的最后一部分。仅使用basename给出最后一个斜杠之后的所有内容,在本例中斜杠为“。


我正在寻找一个解决方案,以获得文件所在的最后一个文件夹名,我只是使用分裂两次,以获得正确的部分。这不是问题,但谷歌把我调到了这里。

pathname = "/folderA/folderB/folderC/folderD/filename.py"
head, tail = os.path.split(os.path.split(pathname)[0])
print(head + "   "  + tail)

以下是我的方法:

>>> import os
>>> print os.path.basename(
        os.path.dirname('/folderA/folderB/folderC/folderD/test.py'))
folderD
>>> print os.path.basename(
        os.path.dirname('/folderA/folderB/folderC/folderD/'))
folderD
>>> print os.path.basename(
        os.path.dirname('/folderA/folderB/folderC/folderD'))
folderC

在python3中,你可以使用pathlib模块(pathlib. python)。例如PurePath):

>>> import pathlib

>>> path = pathlib.PurePath('/folderA/folderB/folderC/folderD/')
>>> path.name
'folderD'

如果您想要文件所在的最后一个文件夹名称:

>>> path = pathlib.PurePath('/folderA/folderB/folderC/folderD/file.py')
>>> path.parent.name
'folderD'

我喜欢Path的部分方法:

grandparent_directory, parent_directory, filename = Path(export_filename).parts[-3:]
log.info(f'{t: <30}: {num_rows: >7} Rows exported to {grandparent_directory}/{parent_directory}/{filename}')

在我目前的项目中,我经常将路径的后面部分传递给函数,因此使用path模块。为了得到第n部分的倒序,我使用:

from typing import Union
from pathlib import Path

def get_single_subpath_part(base_dir: Union[Path, str], n:int) -> str:
    if n ==0:
        return Path(base_dir).name
    for _ in range(n):
        base_dir = Path(base_dir).parent
    return getattr(base_dir, "name")

path= "/folderA/folderB/folderC/folderD/"

# for getting the last part:
print(get_single_subpath_part(path, 0))
# yields "folderD"

# for the second last
print(get_single_subpath_part(path, 1))
#yields "folderC"

此外,为了以包含剩余路径的路径的相反顺序传递第n部分,我使用:

from typing import Union
from pathlib import Path

def get_n_last_subparts_path(base_dir: Union[Path, str], n:int) -> Path:
    return Path(*Path(base_dir).parts[-n-1:])

path= "/folderA/folderB/folderC/folderD/"

# for getting the last part:
print(get_n_last_subparts_path(path, 0))
# yields a `Path` object of "folderD"

# for second last and last part together 
print(get_n_last_subparts_path(path, 1))
# yields a `Path` object of "folderc/folderD"

注意,这个函数返回一个可以很容易地转换为字符串的Pathobject(例如str(path))


如果你使用本地python包pathlib,它真的很简单。

>>> from pathlib import Path
>>> your_path = Path("/folderA/folderB/folderC/folderD/")
>>> your_path.stem
'folderD'

假设在文件夹d中有一个文件的路径。

>>> from pathlib import Path
>>> your_path = Path("/folderA/folderB/folderC/folderD/file.txt")
>>> your_path.name
'file.txt'
>>> your_path.parent
'folderD'