This **`os.chdir()` method**  changes the current working directory to a specified path instance. It does not return any value.
> This descriptor `path` must refer to the open directory, not to an open file.
# 
## Syntax

The syntax is given below:

```python
os.chdir(path)
```


## Parameters
**`path`**: This is the string as a directory or a path value.
## Exception
The `chdir()` method may raise the following exceptions:
* **`OSError`**: This exception is raised when a system-related error occurs.
* **`FileNotFoundError`**: This exception is raised when a directory is requested but does not exist. 
* **`PermissionError`**: This occurs when accessing illegal memory or resources.
## Explanation
Let's discuss this method in detail:

# Demo code
import os
# Get current working directory
dirctory = os.getcwd()
print(f"Current directory: Before= {dirctory}")
# Path to chnage
path = '/usr/'
# Change current working directory 
os.chdir(path)
# Get current working directory again
dirctory = os.getcwd()
print(f"Current working directory: After= {dirctory}")

* **Line 4** : We use the `os.getcwd()` method to extract the current working directory.  
* **Line 7** : We see a temporary directory in the `path` variable as a string. 
* **Line 9** : We use the `chdir(path)` method to change the current working directory.
* **Line 11**: We again extract the current working dir to ensure change.

What is the os.chdir() method in Python?

os.chdir() changes the current working directory to a specified path, raising exceptions like OSError, FileNotFoundError, or PermissionError if errors occur.