Testing that a value is set.

[erinhouston at gmail.com]

I am using winGuiAuto to test a program.  I want to check that a
varible is set.

In the following code I am doing if(len(str(hwnd)) < 0) What is the
python way?

def clickNdSyncStopButton(hwnd=None):
....if(hwnd == None):
........hwnd = winGuiAuto.findTopWindow("NDSync")
....if(len(str(hwnd)) < 0):
........raise "Failed to find the NDSync Dialog"
....StopButton = winGuiAuto.findControl(hwnd, "Stop",
"WindowsForms10.BUTTON.app3")
....if(len(str(StopButton)) < 0):
........raise "Failed to find the StopButton"
....winGuiAuto.clickButton(StopButton)