os.getcwdb()
时间: 2023-12-03 07:04:25 浏览: 12
`os.getcwdb()` 是 Python 的一个内置函数,用于获取当前工作目录的字节字符串形式。
与 `os.getcwd()` 不同的是,`os.getcwdb()` 返回的是字节字符串而不是普通字符串。这在处理某些特殊字符或编码时可能会更有用。
例如,在 Python 解释器中输入以下代码:
```python
import os
print(os.getcwdb())
```
它将返回当前工作目录的字节字符串形式的路径。请注意,这里的返回值是一个字节字符串,而不是普通字符串。
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)
```
os.path.realpath(os.path.join(os.path.split(os.path.realpath(__file__))[0], os.pardir))
这段代码的作用是获取当前脚本所在目录的上一级目录的绝对路径。具体解释如下:
1. `os.path.realpath(__file__)` 获取当前脚本的绝对路径,`__file__` 是 Python 内置的一个变量,表示当前脚本的文件名。
2. `os.path.split()` 将路径分割成目录和文件名,返回一个元组。
3. `os.path.realpath()` 获取目录的绝对路径。
4. `os.path.join()` 将两个路径合并成一个路径。
5. `os.pardir` 代表父级目录。
因此,`os.path.realpath(os.path.join(os.path.split(os.path.realpath(__file__)), os.pardir))` 就是将当前脚本所在目录和上一级目录合并成一个路径,再获取它的绝对路径。
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