So MSS can be used as simply as:

from mss import mss

Or import the good one base on your operating system:

# MacOS X
from mss.darwin import MSS as mss

# GNU/Linux
from mss.linux import MSS as mss

# Microsoft Windows
from mss.windows import MSS as mss

So the module can be used as simply as:

with mss() as sct:
    # ...

sct = mss()
sct.shot()
sct.grab()
# or any attribute/method of sct

mss().shot()
mss().grab()
# or any mss().xxx or mss().xxx()

If you plan to integrate MSS inside your own module or software, pay attention to using it wisely.

This is a bad usage:

for _ in range(100):
    with mss() as sct:
        sct.shot()

This is a much better usage, memory efficient:

with mss() as sct:
    for _ in range(100):
        sct.shot()

Also, it is a good thing to save the MSS instance inside an attribute of you class and calling it when needed.

On GNU/Linux, you can specify which display to use (useful for distant screenshots via SSH):

with mss(display=":0.0") as sct:
    # ...

A more specific example to only target GNU/Linux:

.. literalinclude:: examples/linux_display_keyword.py
    :lines: 9-

You can use mss via the CLI:

mss --help

Or via direct call from Python:

python -m mss --help

.. versionadded:: 3.1.1