在这段代码如何停止后发现或使用python

Question

import win32com.client 
objSWbemServices = win32com.client.Dispatch(
    "WbemScripting.SWbemLocator").ConnectServer(".","root\cimv2") 
for item in objSWbemServices.ExecQuery(
     "SELECT * FROM Win32_PnPEntity "): 
    found=False 
    for name in ('Caption','Capabilities '): 
     a = getattr(item, name, None) 
     if a is not None: 
      b=('%s,' %a) 
      if "Item" in b: 
       print "found" 
       found = True 

      else: 
       print "Not found" 
       break 

我只想要一次显示“发现”找不到串别的“未找到”

Answer 1

你后面添加“破发”，“如果”情况是这样的：

for name in ('Caption','Capabilities '): 
    a = getattr(item, name, None) 
    if a is not None: 
     b=('%s,' %a) 
     if "Item" in b: 
      print "found" 
      found = True 

      #added here 
      break 

     else: 
      print "Not found" 
      break 

这将爆发迭代过的 “（ '标题'， '能力'）”

Answer 2

移动break一个压痕电平向上：

for name in ('Caption','Capabilities '): 
    a = getattr(item, name, None) 
    if a is not None: 
     b=('%s,' %a) 
     if "Item" in b: 
      print "found" 
      found = True 
     else: 
      print "Not found" 

     break 

Answer 3

显示？你的意思是执行，我想。 只要把它放在else语句的外部（如果a不是None的话）。以这种方式，如果a不是none，那么只要“Item”在b中，循环就会停止。

for name in ('Caption','Capabilities '): 
    a = getattr(item, name, None) 
    if a is not None: 
     b=('%s,' %a) 
     if "Item" in b: 
      print "found" 
      found = True 

     else: 
      print "Not found" 
     break 

编辑：见warwaruk雁

Answer 4

另一种方式做，这是使用功能和替代的回报，你必须打印。您可以利用python中的函数在返回时停止执行的事实。

def finder(): 
    objSWbemServices = win32com.client.Dispatch(
     "WbemScripting.SWbemLocator").ConnectServer(".","root\cimv2") 
    for item in objSWbemServices.ExecQuery(
     "SELECT * FROM Win32_PnPEntity "): 
     for name in ('Caption','Capabilities '): 
      a = getattr(item, name, None) 
      if a is not None: 
       b=('%s,' %a) 
       if "Item" in b: 
        return True # or return "Found" if you prefer 
       else: 
        return False # or return "Not Found" if you prefer 

found = finder() 
print found 
# or 
print finder()