unixtest.py

from Xlib.display import Display
from Xlib import X
from Xlib.ext import record
from Xlib.protocol import rq

# True if you want to stop events from reaching other apps
capture = True

def record_callback(reply):
    data = reply.data
    while len(data):
        event, data = rq.EventField(None).parse_binary_value(data, display.display, None, None)
        print event

display = Display(':0')
root = display.screen().root

if capture:
    root.grab_pointer(True, X.ButtonPressMask | X.ButtonReleaseMask, X.GrabModeAsync, X.GrabModeAsync, 0, 0, X.CurrentTime)

ctx = display.record_create_context(
        0,
        [record.AllClients],
        [{
                'core_requests': (0, 0),
                'core_replies': (0, 0),
                'ext_requests': (0, 0, 0, 0),
                'ext_replies': (0, 0, 0, 0),
                'delivered_events': (0, 0),
                'device_events': (X.ButtonPressMask, X.ButtonReleaseMask),
                'errors': (0, 0),
                'client_started': False,
                'client_died': False,
        }])

display.record_enable_context(ctx, record_callback)