os.walk(dir)
时间: 2023-10-26 22:07:34 浏览: 29
`os.walk(dir)` 是一个 Python 的函数,它可以遍历指定目录及其所有子目录下的所有文件和文件夹。它返回一个生成器对象,每次迭代时,会返回一个包含三个元素的元组:当前文件夹的路径、当前文件夹下的所有子文件夹的名称列表、当前文件夹下的所有文件的名称列表。可以使用 `for` 循环来遍历这个生成器对象,对每个文件和文件夹进行处理。以下是一个示例代码:
```python
import os
for dirpath, dirnames, filenames in os.walk('/path/to/folder'):
# 处理当前文件夹
print('Current folder:', dirpath)
# 处理当前文件夹下的所有子文件夹
print('Subfolders:', dirnames)
# 处理当前文件夹下的所有文件
print('Files:', filenames)
```
相关问题
os.walk os.listdir
`os.walk` and `os.listdir` are both Python functions used to traverse directories and retrieve information about the files and subdirectories within them.
`os.walk` is a generator function that returns a tuple of three values for each directory it traverses: the path of the directory, a list of the subdirectories within that directory, and a list of the files within that directory. This function is often used to recursively traverse a directory tree and perform operations on all the files and directories within it.
Here's an example of using `os.walk` to print out the names of all the files in a directory tree:
```
import os
root_dir = '/path/to/root/dir'
for dirpath, dirnames, filenames in os.walk(root_dir):
for filename in filenames:
print(os.path.join(dirpath, filename))
```
`os.listdir`, on the other hand, is a simpler function that returns a list of all the files and directories within a given directory. It does not recursively traverse subdirectories, but only returns the names of the files and directories within the specified directory.
Here's an example of using `os.listdir` to print out the names of all the files in a directory:
```
import os
dir_path = '/path/to/dir'
for filename in os.listdir(dir_path):
if os.path.isfile(os.path.join(dir_path, filename)):
print(filename)
```
python的os.walk
os.walk() 是 Python 中用于遍历目录树的函数,它返回一个三元组 (dirpath, dirnames, filenames),其中 dirpath 表示当前遍历到的目录路径,dirnames 表示该目录下的所有子目录名,filenames 表示该目录下的所有文件名。os.walk() 会自动遍历当前目录及其子目录下的所有文件和文件夹。
下面是一个简单的例子,演示如何使用 os.walk() 遍历目录树并打印出所有文件的路径:
```python
import os
root_dir = '/path/to/root/dir'
for dirpath, dirnames, filenames in os.walk(root_dir):
for filename in filenames:
file_path = os.path.join(dirpath, filename)
print(file_path)
```
在上面的代码中,我们首先指定了要遍历的根目录 root_dir,然后使用 for 循环遍历 os.walk() 返回的三元组。对于每个三元组,我们使用另一个 for 循环遍历其中的 filenames 列表,并使用 os.path.join() 函数将当前文件的路径拼接起来,最后打印出来。