Python code to read GPIO

#!/usr/bin/python
import struct

Event_Device = "/dev/input/event0"
Event_Format = 'iihhi'

Event_File = open(Event_Device, "rb")
This_Event = Event_File.read(16)
while This_Event:
    (stamp1, stamp2, type, code, value) = struct.unpack(Event_Format, This_Event)
    if type == 1 and value == 1 and code == 275:
        print " GPIO 133 button pressed! "
    if code == 276:
        Event_File.close()
        print "exiting...."
        exit(0)
    This_Event =  Event_File.read(16)
Event_File.close()