#infinite loop
while True:
#acquire the keyboard hit if exists
x = kbfunc()
#if we got a keyboard hit
if x != False and x.decode() == 'r':
#we got the key!
#because x is a binary, we need to decode to string
#use the decode() which is part of the binary object
#by default, decodes via utf8
#concatenation auto adds a space in between
print ('dispensing')
s.dispense(200)
#break loop
if x != False and x.decode() == 'f':
#we got the key!
#because x is a binary, we need to decode to string
#use the decode() which is part of the binary object
#by default, decodes via utf8
#concatenation auto adds a space in between
print ('retracting')
s.retract(volume)
#break loop
if x != False and x.decode() == '1':
#we got the key!
#because x is a binary, we need to decode to string
#use the decode() which is part of the binary object
