index error with QSettingsManager

[mc3]

I’m getting
—
File "/Users/ajr/Projects/NET/zad/zad/views/settings.py", line 178, in setup
sc.add_handler("gen/ignored_nets", sd.ignoredListWidget)
File "/usr/local/py_env/zad/lib/python3.9/site-packages/pyqtconfig/config.py", line 877, in add_handler
handler.setter(self._get(key))
File "/usr/local/py_env/zad/lib/python3.9/site-packages/pyqtconfig/config.py", line 428, in _set_QListWidget
self.findItems(
IndexError: list index out of range
—
This happens if the list corresponding to the QListWidget is not empty.
I’m using pyqtconfig.QSettingsManager() and do not touch the QListWidget.
Instead I modify the settings by replacing the complete list with a modified (per GUI) one.

This is the code to access and set the list settings:

---

def getPrefs(self):
self.prefs = sc.get(self.listPrefName)
return

def addPref(self, value):
self.getPrefs()
self.prefs.append(value)
sc.set(self.listPrefName, self.prefs)
self.printSettings('End addPref')

def setPref(self, index, value):
self.prefs[index] = value
sc.set(self.listPrefName, self.prefs)

def delPref(self, value):
self.getPrefs()
self.prefs.remove(value)
sc.set(self.listPrefName, self.prefs)

---

self.prefs is the list of values.
self.listPrefName is something like ’gen/ip4_nets'
sc is the pyqtconfig.QSettingsManager instance.

[PedanticHacker]

This code

if v:
    for s in v:
        self.findItems(
            unicode(self._set_map(s)),
            Qt.MatchExactly)[0].setSelected(True)

should probably be rewritten to

try:
    for s in v:
        self.findItems(
            unicode(self._set_map(s)),
            Qt.MatchExactly
        )[0].setSelected(True)
except (KeyError, TypeError):
    return None

We must catch a KeyError to solve the problem that @mc3 encountered, and also a TypeError to anticipate that v might be None. The code is in pyqtconfig/config.py starting on line 433.