python - python在Modbusclient中使用变量

Question

我在函数中使用变量时遇到问题。

ports = ["'/dev/ttyXRUSB0'","'/dev/ttyXRUSB1'"]
for item in ports:
  print len(ports)
  #port = item
  print item 
  client = ModbusClient(method = 'rtu', port = item, baudrate = 115200, timeout = 0.2)
  print client
  client.connect()

我想看看客户端 = ModbusClient(method = 'rtu', port = '/dev/ttyXRUSB0' baudrate = 115200, timeout = 0.2)

我在哪里搞砸了？