例外后繼續

Question

幫助我弄清楚當WMI無法連接到主機並轉到列表中的下一台計算機時，腳本將如何繼續運行。 除非之后我應該繼續使用嗎？

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

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)

一般而言，除非您將異常用於控制流，否則應盡快將其捕獲，以防止與其他異常混合。 另外，您應該具體說明要捕獲的異常，而不是捕獲通用的異常。

Answer 2

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