# import sys

**[import sys](https://docs.python.org/3/library/sys.html)** is a Python import that provides access to interpreter state and command-line arguments: `argv`, `exit()`, stdin/stdout, and module paths. Use this for CLI scripts that need to read arguments or exit with a status code.

## Example

```python
# Python
# description: read command-line arguments, print to stderr

import sys

# Access command-line arguments (argv[0] is script name)
if len(sys.argv) < 2:
    print("Usage: script.py <name>", file=sys.stderr)
    sys.exit(1)

name = sys.argv[1]
print(f"Hello, {name}")

# Print Python version
print(f"Python {sys.version}")

sys.exit(0)  # exit with status 0 (success)
```

## Common attributes and functions

- `sys.argv`: list of command-line arguments
- `sys.exit(code)`: exit script with status code
- `sys.stderr`: standard error stream
- `sys.stdout`: standard output stream
- `sys.stdin`: standard input stream
- `sys.version`: Python version string
- `sys.platform`: platform identifier (e.g., 'linux', 'darwin')
- `sys.path`: list of directories to search for modules
- `sys.modules`: dictionary of loaded modules
- `sys.maxsize`: maximum size of containers