使用Python中的pywinauto保存Firefox网页时出错

SaveFromFirefox.py程序的源代码(在上面的URL中给出)是：

from pywinauto.application import Application
import sys
import time
import os.path

if len(sys.argv) < 2:
    print "please specify a web address to download"
    sys.exit()

web_addresss = sys.argv[1]

if len(sys.argv) > 2:
    outputfilename = sys.argv[2]
else:
    outputfilename = web_addresss
    outputfilename = outputfilename.replace('/','')
    outputfilename = outputfilename.replace('','')
    outputfilename = outputfilename.replace(':','')


# start IE with a start URL of what was passed in
app = Application().start_(
    r"c:program filesMozilla FirefoxFirefox.exe %s"% web_addresss)

# some pages are slow to open - so wait some seconds
time.sleep(4)

# mozilla is one of thos applications that use existing windows
# if they exist (at least on my machine!)
# so if we cannot find any window for that process
#  - find the actual process
#  - connect to it
if app.windows_():
    mozilla =  app.window_(title_re = ".*Mozilla Firefox")

else:
    app = Application().connect_(title_re = ".*Mozilla Firefox")
    mozilla = app.window_(title_re = ".*Mozilla Firefox")

# ie doesn't define it's menus as Menu's but actually as a toolbar!
print "No Menu's in FireFox:",mozilla.MenuItems()

# File -> Save As
mozilla.TypeKeys("%FA")
#ie.Toolbar3.PressButton("File")
app.SaveAs.FileNameEdit.SetEditText(outputfilename)

app.SaveAs.Save.CloseClick()

# if asked to overwrite say yes
if app.SaveAs.Yes.Exists():
    app.SaveAs.Yes.CloseClick()

print "saved:",outputfilename

# File close tab or close
#(Firefox makes it easy for us having the same shortcut for both!
mozilla.TypeKeys("%FC")

当我尝试在命令提示符下执行该文件时,它会打开firefox浏览器,然后打开“另存为”对话框,但不按“保存”按钮.

相反,它给出以下错误消息：

C:Usersarun_mDesktop>python2 SaveFromFirefox.py www.google.com
No Menu's in FireFox: []
Traceback (most recent call last):
  File "SaveFromFirefox.py",line 51,in <module>
    app.SaveAs.FileNameEdit.SetEditText(outputfilename)
  File "C:Python27libsite-packagespywinautoapplication.py",line 229,in __getattr__
    ctrls = _resolve_control(self.criteria)
  File "C:Python27libsite-packagespywinautoapplication.py",line 795,in _resolve_control
    raise e.original_exception
pywinauto.findbestmatch.MatchError: Could not find 'FileNameEdit' in '['',u'ShellView',u'Address: D:My_Dox_backupWorkAutomation FactorySeleniumSikuli',u'DUIViewWndClas
sName','Toolbar4',u'ShellViewSHELLDLL_DefView',u'Namespace Tree Control',u'Breadcrumb Parent',u'Address Band Root',u'Tree ViewTreeView',u'UniversalSearchBand',u'SearchEditB
oxWrapperClass','ComboBox2','Progress','ComboBox0','ComboBox1','Toolbar2',u'CtrlNotifySink',u'ScrollBar','20','21','22','23',u'FloatNotifySink0','ComboBox',u'FloatNot
ifySink2',u'TravelBand',u'WorkerW','1','0','3','2','5','4','7','6',u'NamespaceTreeControl','8','12','TreeView','Toolbar1',u'CancelButton','Toolbar','11',u'Search
 Box','ReBar','Edit','Button',u'CtrlNotifySink0',u'CtrlNotifySink1',u'CtrlNotifySink2','Toolbar3','9','Button1','Button0',u'FloatNotifySink',u'DirectUIHWND3',u'&SaveBu
tton',u'DirectUIHWND','10','13',u'CancelScrollBar','15','14','17','Button2','19','18',u'Tree View','16',u'SHELLDLL_DefView',u'Namespace Tree ControlNamespaceTreeContr
ol',u'&Save',u'Address: D:My_Dox_backupWorkAutomation FactorySeleniumSikuliToolbar','Toolbar0',u'FloatNotifySink1',u'DirectUIHWND1',u'DirectUIHWND0',u'Cancel',u'D
irectUIHWND2']'

出了什么问题？