类型错误：“浮动对象不可调用的”

Question

为什么一个简单的time.sleep(1)声明引起：

Type error : 'float' object not callable? 

代码如下：

try: 
    while True 
     time.sleep(10) 
     current_state = GPIO.input(pir_sensor) 
     if current_state ==1: 
      print "PIR Activated" 
except KeyboardInterrupt: 
    GPIO.cleanup() 

Answer 1

它可能不是因为time.sleep(10) 论第二行while循环缺少冒号：

try: 
    while True: # <-- Added colon here 
     time.sleep(10) 
     current_state = GPIO.input(pir_sensor) 
     if current_state == 1: 
      print "PIR Activated" 
except KeyboardInterrupt: 
    GPIO.cleanup()