about elif event.type

hi i am reconfigure some hotkey i hope someone can help me

code modified :
elif event.type == ‘THREE’ and event.value==‘PRESS’:
bpy.context.object.modifiers[“Array”].constant_offset_displace[self.nd]+=0.01

    elif event.type == 'ONE' and event.value=='PRESS':
        bpy.context.object.modifiers["Array"].constant_offset_displace[self.nd]-=0.01

description :
i modified and change hotkey which is one and three

Question : i want to add a shift modifier and increase the value
to 1.00

so if i press shift + 1
the value slider is adding 1.00 each press

i hope someone can help me thank you