SWITCH = 2
KEY = 3
+class VendingException(Exception): pass
+
class VendingMachine:
def __init__(self, rfh, wfh):
self.events = []
self.wfh.write('PING\n')
code = ''
while code != '000':
- (code, _) = self.get_response()
+ code = self.get_response()[0]
self.get_switches()
def await_prompt(self):
prefix = ''
s = ''
while True:
- s = self.rfh.read(1)
- if s == '': raise Exception('nothing read!')
+ try:
+ s = self.rfh.read(1)
+ except socket.error:
+ print "Blah, seems DEC server has fallen over"
+ raise VendingException('failed to read input from vending machine')
+ if s == '': raise VendingException('nothing read!')
if s == '\n' or s == '\r':
state = 1
prefix = ''