Develop Reference

Python can't import WMI under special circumstance

I've created a standalone exe Windows service written in Python and built with pyInstaller. When I try to import wmi, an exception is thrown.
What's really baffling is that I can do it without a problem if running the code in a foreground exe, or a foreground python script, or a python script running as a background service via pythonservice.exe!
Why does it fail under this special circumstance of running as a service exe?
import wmi
Produces this error for me:
com_error: (-2147221020, 'Invalid syntax', None, None)
Here's the traceback:
Traceback (most recent call last):
File "<string>", line 43, in onRequest
File "C:\XXX\XXX\XXX.pyz", line 98, in XXX
File "C:\XXX\XXX\XXX.pyz", line 31, in XXX
File "C:\XXX\XXX\XXX.pyz", line 24, in XXX
File "C:\XXX\XXX\XXX.pyz", line 34, in XXX
File "C:\Program Files (x86)\PyInstaller-2.1\PyInstaller\loader\pyi_importers.py", line 270, in load_module
File "C:\XXX\XXX\out00-PYZ.pyz\wmi", line 157, in <module>
File "C:\XXX\XXX\out00-PYZ.pyz\win32com.client", line 72, in GetObject
File "C:\XXX\XXX\out00-PYZ.pyz\win32com.client", line 87, in Moniker
wmi.py line 157 has a global call to GetObject:
obj = GetObject ("winmgmts:")
win32com\client__init.py__ contains GetObject(), which ends up calling Moniker():
def GetObject(Pathname = None, Class = None, clsctx = None):
"""
Mimic VB's GetObject() function.
ob = GetObject(Class = "ProgID") or GetObject(Class = clsid) will
connect to an already running instance of the COM object.
ob = GetObject(r"c:\blah\blah\foo.xls") (aka the COM moniker syntax)
will return a ready to use Python wrapping of the required COM object.
Note: You must specifiy one or the other of these arguments. I know
this isn't pretty, but it is what VB does. Blech. If you don't
I'll throw ValueError at you. :)
This will most likely throw pythoncom.com_error if anything fails.
"""
if clsctx is None:
clsctx = pythoncom.CLSCTX_ALL
if (Pathname is None and Class is None) or \
(Pathname is not None and Class is not None):
raise ValueError("You must specify a value for Pathname or Class, but not both.")
if Class is not None:
return GetActiveObject(Class, clsctx)
else:
return Moniker(Pathname, clsctx)
The first line in Moniker(), i.e. MkParseDisplayName() is where the exception is encountered:
def Moniker(Pathname, clsctx = pythoncom.CLSCTX_ALL):
"""
Python friendly version of GetObject's moniker functionality.
"""
moniker, i, bindCtx = pythoncom.MkParseDisplayName(Pathname)
dispatch = moniker.BindToObject(bindCtx, None, pythoncom.IID_IDispatch)
return __WrapDispatch(dispatch, Pathname, clsctx=clsctx)
Note: I tried using
pythoncom.CoInitialize()
which apparently solves this import problem within a thread, but that didn't work...

I also face the same issue and I figure out this issue finally,
import pythoncom and CoInitialize pythoncom.CoInitialize (). They import wmi
import pythoncom
pythoncom.CoInitialize ()
import wmi

I tried solving this countless ways. In the end, I threw in the towel and had to just find a different means of achieving the same goals I had with wmi.
Apparently that invalid syntax error is thrown when trying to create an object with an invalid "moniker name", which can simply mean the service, application, etc. doesn't exist on the system. Under this circumstance "winmgmts" just can't be found at all it seems! And yes, I tried numerous variations on that moniker with additional specs, and I tried running the service under a different user account, etc.

Honestly I didn't dig in order to understand why this occurs.
Anyway, the below imports solved my problem - which was occurring only when ran from a Flask instance:
import os
import pythoncom
pythoncom.CoInitialize()
from win32com.client import GetObject
import wmi

The error "com_error: (-2147221020, 'Invalid syntax', None, None)" is exactly what popped up in my case so I came here after a long time of searching the web and voila:
Under this circumstance "winmgmts" just can't be found at all it
seems!
This was the correct hint for because i had just a typo , used "winmgmt:" without trailing 's'. So invalid sythax refers to the first methods parameter, not the python code itself. o_0 Unfortunately I can't find any reference which objects we can get with win32com.client.GetObject()... So if anybody has a hint to which params are "allowed" / should work, please port it here. :-)
kind regards
ChrisPHL

Adding new portgroups to vmware virtual switches using pysphere

I'm trying to automate the addition of new portgroups to ESXi hosts using pysphere. I'm using the following code fragment:
from pysphere import MORTypes
from pysphere import VIServer, VIProperty
from pysphere.resources import VimService_services as VI
s = VIServer()
s.connect(vcenter, user, password)
host_system = s.get_hosts().keys()[17]
prop = VIProperty(s, host_system)
propname = prop.configManager._obj.get_element_networkSystem()
vswitch = prop.configManager.networkSystem.networkInfo.vswitch[0]
network_system = VIMor(propname, MORTypes.HostServiceSystem)
def add_port_group(name, vlan_id, vswitch, network_system):
request = VI.AddPortGroupRequestMsg()
_this = request.new__this(network_system)
_this.set_attribute_type(network_system.get_attribute_type())
request.set_element__this(_this)
portgrp = request.new_portgrp()
portgrp.set_element_name(name)
portgrp.set_element_vlanId(vlan_id)
portgrp.set_element_vswitchName(vswitch)
portgrp.set_element_policy(portgrp.new_policy())
request.set_element_portgrp(portgrp)
s._proxy.AddPortGroup(request)
However, when I attempt to run it, I get the following error:
>>> add_port_group(name, vlan_id, vswitch, network_system)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 12, in add_port_group
File "/usr/lib/python2.6/site-packages/pysphere-0.1.8- py2.6.egg/pysphere/resources/VimService_services.py", line 4344, in AddPortGroup
response = self.binding.Receive(AddPortGroupResponseMsg.typecode)
File "/usr/lib/python2.6/site-packages/pysphere-0.1.8- py2.6.egg/pysphere/ZSI/client.py", line 545, in Receive
return _Binding.Receive(self, replytype, **kw)
File "/usr/lib/python2.6/site-packages/pysphere-0.1.8- py2.6.egg/pysphere/ZSI/client.py", line 464, in Receive
raise FaultException(msg)
pysphere.ZSI.FaultException: The object has already been deleted or has not been completely created
I've attempted to swap in different values for "vswitch" and "network_system", but I haven't had any success. Has anyone attempted to do something similar with pysphere successfully?
I can accomplish what I need through Powershell, which demonstrates that it isn't a vmware issue, but I don't want to use Powershell in this particular case.

I tried your code on one of our vSpheres.
It seems you are passing the object to set_element_vswitchName rather than the name. Maybe this will help:
vswitch = prop.configManager.networkSystem.networkInfo.vswitch[0].name

Where does this pywinauto exception get its list from?

If I run:
from pywinauto.findwindows import find_windows
find_windows(best_match="affafa")
I get an exception that returns
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "c:\Python27\lib\site-packages\pywinauto\findwindows.py", line 204, in find_windows
best_match, wrapped_wins)
File "c:\Python27\lib\site-packages\pywinauto\findbestmatch.py", line 497, in find_best_control_matches
raise MatchError(items = name_control_map.keys(), tofind = search_text)
pywinauto.findbestmatch.MatchError: Could not find 'affafa' in '[u'CabinetWClass', u'Inbox (1,455) - ******#gmail.com - Gmail - Google Chrome', u'Chrome_WidgetWin_1', '', u'*new 2 - Notepad++Notepad++', u'python - Where does this pywinauto exception get its list from? - Stack Overflow - Google ChromeChrome_WidgetWin_1', u'C:\\Windows\\system32\\cmd.exe - pythonConsoleWindowClass1', u'C:\\Windows\\system32\\cmd.exe - pythonConsoleWindowClass0', u'C:\\Windows\\system32\\cmd.exe - pythonConsoleWindowClass2']' # this list has been shortened for security reasons
What I want to do is,Find out where the giant list of processes is coming from and directly call that.
So far ive been messing around with
find_windows(visible_only = False)
# and some of the other options listed in findwindows.py
but all the find_windows options only return a list of numbers which from documentation, i think are process IDs...., which for some reason do NOT match up with what i have ( for example, i create a "Calculator" and its process ID is 6566, and then i run find_windows() and i cannot find the process ID in it. So that's another issue I'm having.... but i can solve this problem if i can get my giant list.
This is my first question asked on stack overflow. I hope I made you guys proud

If you want to get a list of the names for all windows, you should use the next construction.
handles = pywinauto.findwindows.find_windows()
for w_handle in handles:
wind = app.window_(handle=w_handle)
print wind.Texts()
You may filter/extend the list by the next arguments of find_windows function:
top_level_only Top level windows only (default=True)
visible_only Visible windows only (default=True)
enabled_only Enabled windows only (default=True)
active_only Active windows only (default=False)

Python NoneType _getitem_ error

I'm working with a pice of software written in python from US CERT to do some fuzzing. Included in the software is a minimizer.py tool which is designed to be ran against certain test cases that cause crashes in order to determine exactly which byte mutations are causing the crash.
However when attempting to run the tool it's spitting an error at me. Google searches for both the tool and the error are drawing a blank. Attempting to troubleshoot it myself with limited python experience is not helping either. Any ideas on whats causing the error so I can fix it and get the tool working?
command line options being used are: minimizer.py --stringmode
The error output is as follows:
Traceback (most recent call last):
File "C:\FOE2\tools\minimize.py", line 234, in <module>
main()
File "C:\FOE2\tools\minimize.py", line 183, in main
config = Config(cfg_file).config
File "C:\FOE2\certfuzz\campaign\config\__init__.py", line 76, in __init__
self._set_derived_options()
File "C:\FOE2\certfuzz\campaign\config\foe_config.py", line 93, in _set_derived_options
t = Template(self.config['target']['cmdline_template'])
TypeError: 'NoneType' object has no attribute '__getitem__'
Segments of code from both of the files in last two lines of error are:
__init__.py:
def __init__(self, config_file):
self.file = config_file
self.config = None
self.load()
self._set_derived_options()
self.validations = []
self._add_validations()
self.validate()
def _set_derived_options(self):
pass
And then from foe_config_.py (added the preceding lines of code just in case they are relevant.):
class Config(ConfigBase):
def _add_validations(self):
self.validations.append(self._validate_debugger_timeout_exceeds_runner)
def _set_derived_options(self):
# interpolate program name
# add quotes around $SEEDFILE
t = Template(self.config['target']['cmdline_template'])
#self.config['target']['cmdline_template'] = t.safe_substitute(PROGRAM=self.config['target']['program'])
self.config['target']['cmdline_template'] = t.safe_substitute(PROGRAM=quoted(self.config['target']['program']), SEEDFILE=quoted('$SEEDFILE'))

It's hard to tell from the code you posted, but it looks like __init__ sets self.config to None. Then it calls _set_derived_options which uses self.config here:
t = Template(self.config['target']['cmdline_template'])
But self.config hasn't changed from being None. You wouldn't expect None['target'] to give you anything (other than an Exception), but I think that is essentially what you're doing here.

Error Handling in Python with SUDS

I have been trying to control a camera through a wsdl file using SUDS. I have got the code working but I want to place error handling into the script. I have tried different exceptions but am unable to get the script working. When I enter an invalid coordinate I get an error. The code I am using is below followed by the error I am recieving.
#!/home/build/Python-2.6.4/python
import suds
from suds.client import Client
####################################################################
#
# Python SUDS Script that controls movement of Camera
#
####################################################################
#
# Absolute Move Function
#
####################################################################
def absoluteMove():
# connects to WSDL file and stores location in variable 'client'
client = Client('http://file.wsdl')
# Create 'token' object to pass as an argument using the 'factory' namespace
token = client.factory.create('ns4:ReferenceToken')
print token
# Create 'dest' object to pass as an argument and values passed to this object
dest = client.factory.create('ns4:PTZVector')
dest.PanTilt._x=400
dest.PanTilt._y=0
dest.Zoom._x=1
print dest
# Create 'speed' object to pass as an argument and values passed to this object
speed = client.factory.create('ns4:PTZSpeed')
speed.PanTilt._x=0
speed.PanTilt._y=0
speed.Zoom._x=1
print speed
# 'AbsoluteMove' method invoked passing in the new values entered in the above objects
try:
result = client.service.AbsoluteMove(token, dest, speed)
except RuntimeError as detail:
print 'Handling run-time error:', detail
print "absoluteMove result ", result
result = absoluteMove()
The error is below:
No handlers could be found for logger "suds.client"
Traceback (most recent call last):
File "ptztest.py", line 48, in <module>
if __name__ == '__main__': result = absoluteMove()
File "ptztest.py", line 42, in absoluteMove
result = client.service.AbsoluteMove(token, dest, speed)
File "build/bdist.linux-i686/egg/suds/client.py", line 537, in __call__
File "build/bdist.linux-i686/egg/suds/client.py", line 597, in invoke
File "build/bdist.linux-i686/egg/suds/client.py", line 632, in send
File "build/bdist.linux-i686/egg/suds/client.py", line 683, in failed
File "build/bdist.linux-i686/egg/suds/bindings/binding.py", line 235, in get_fault
suds.WebFault: Server raised fault: 'Error setting requested pan'
I am not sure which exception I should be using here. Does anyone know how to catch this error. The x coordinate with the value 400 is in degree's that is why the error happens.
Thanks
Okay I have found the solution. In SUDS if you enter:
faults=False
into the client definition, this catches faults and gives the reason why the fault happened. The line should read:
client = Client('http://file.wsdl', faults=False)
The post that I have marked as the correct answer also is able to catch that a problem has happened.
Thanks all

If you handled all exceptions and errors in your code and your code is working fine but still you are getting below message with your correct output.
Msg : "No handlers could be found for logger suds.client "
Then a simple solution is to add this line
logging.getLogger('suds.client').setLevel(logging.CRITICAL)
in yourclient.py file just after all import statement.

If you want to catch that exception you should put
try:
result = client.service.AbsoluteMove(token, dest, speed)
except suds.WebFault as detail:
...

You need to catch suds.WebFault by the looks of that traceback. The error itself seems legitimate, IE, your requests are being executed correctly, but perhaps your parameters are wrong in the given context.

I believe you refer to a harmless diagnostic message in your comment. I could suppress messages from suds calling logging.error() by assigning logging.INFO to basicConfig and logging.CRITICAL to suds.client.
https://fedorahosted.org/suds/wiki/Documentation