异常后继续

Question

帮我弄清楚当WMI无法连接到主机并转到列表中的下一台计算机时，脚本将如何继续运行。除了之后我应该继续使用吗？

import wmi 
MachineList = ["Computer1","Computer2","Computer3"] 
try: 
    for machines in MachineList: 
     c = wmi.WMI(machines) # <---- Go to next in the for loop when connection fail??? 
     for os in c.Win32_OperatingSystem(): 
      print os.Caption 
except: 
    pass 

Answer 1

for machine in MachineList: 
    try: 
     c = wmi.WMI(machine) 
     for os in c.Win32_OperatingSystem(): 
      print os.caption 
    except Exception: 
     print "Failed on machine %s" % machine 

Answer 2

import wmi 
MachineList = ["Computer1","Computer2","Computer3"] 
for machines in MachineList: 
    try: 
     c = wmi.WMI(machines) # <---- Go to next in the for loop when connection fail??? 
     for os in c.Win32_OperatingSystem(): 
      print os.Caption 
    except Exception: #Intended Exception should be mentioned here 
     print "Cannot Connect to {}".format(machines) 

一般来说，除非你使用控制流异常，则应该尽快合理，防止与其他混合例外抓到。你也应该明确你想要捕捉什么异常，而不是捕捉一些通用的东西。