Python cluelessness with lists

Question

Hi, I'm trying to transition from VBScript to Python and having some trouble understanding lists in Python. What I'm trying to do is find all the comboboxes in a dialog and add them to a list. Once they are in the list I iterate through the list setting the indexes of the comboboxes. Unfortunately it's not working.

Here is a simplified version of the code omitting the iteration through the list with a 'for' statement:

dlg = some_dialog

combos = [(dlg.FindAllChildren(QtClassName,"OnOneComboBox",7))]

combos[0].QComboBox_setCurrentIndex(1)

When I run the code I get this error:

AttributeError: 'SafeArrayWrapper' object has no attribute 'QComboBox_setCurrentIndex'

What is this "SafeArrayWrapper" business?

Many thanks, John

john_or · Accepted Answer

It looks like I figured it out.&nbsp; I changed :combos = [(dlg.FindAllChildren(QtClassName,"OnOneComboBox",7))]&nbsp;to&nbsp;combos = list(dlg.FindAllChildren(QtClassName,"OnOneComboBox",7))&nbsp;Removing the brackets per your suggestion and adding "list" did the trick.&nbsp; Now&nbsp;setting the index&nbsp;is working and I'm able to append to the list.&nbsp;&nbsp;&nbsp;

baxatob · Answer

Hi,
&nbsp;
Try to remove square brackets from your statement:
&nbsp;
combos = dlg.FindAllChildren(QtClassName,"OnOneComboBox",7)
Otherwise you will receive array in array, something like:
&nbsp;
[[obj1, obj2, obj3]]

baxatob · Answer

FindAllChildren()&nbsp;returns list anyway. You can omit adding a list():
&nbsp;
combos = dlg.FindAllChildren(QtClassName,"OnOneComboBox",7)
&nbsp;

nishera · Answer

You said you are creating a list ...So what do you suppose to do with&nbsp;combos[0].QComboBox_setCurrentIndex(1) ?what the message saying is there is no attribute call "QComboBox_setCurrentIndex(1)" in lists class/object&nbsp;what index are you going to set?&nbsp; &nbsp;&nbsp;for Iterate you can use&nbsp;combos[i] in for loop which iterate from 0 to len(combos)&nbsp;to understand python lists read&nbsp;this&nbsp;and&nbsp;this&nbsp;&nbsp;

john_or · Answer

Hi, thanks for the reply.&nbsp; I'm expecting combos[0] to return the combobox object at index zero in the combos list.&nbsp; Provided that happens&nbsp;QComboBox_setCurrentIndex(1)&nbsp;will select the second item in the combobox.&nbsp;&nbsp;&nbsp;The problem is I'm not getting an object back with combos[0].&nbsp; Instead of&nbsp;the combobox object I'm getting a "SafeArrayWrapper".&nbsp; If I don't get the combobox back then&nbsp;QComboBox_setCurrentIndex(1)&nbsp;will obviously fail. &nbsp;Also, I can't find any information in Python documentation regarding a "SafeArrayWrapper" object.&nbsp; My assumption is SafeArrayWrapper is a SmartBear/TestComplete&nbsp;construct that doesn't exist natively&nbsp;in Python.&nbsp; I could be wrong about that though.&nbsp;&nbsp;

john_or · Answer

Hi, thanks for the tip.&nbsp; Removing the brackets works&nbsp;but later when I want to append to the combos list/array it's not working.&nbsp; Following on from my example I tried something like this:combos.append (some_other_combo_here)&nbsp;That gives me the familiar error:&nbsp; "AttributeError" 'SafeArrayWrapper' object has no attribute 'append'.&nbsp;Any idea how I can successfully append to combos?&nbsp;Thanks,John

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Python cluelessness with lists

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