human
Solve the following python programming problem given the following code:
def openSpreadsheet(self, fileName) : 
    ' openSpreadsheet(fileName: str) -> None
        Open a saved spreadsheet assuming that all VTK files must exist and have
        all the version using the saved spreadsheet

        ' 
    def parse_locator(text) : 
        locator = None 
        wrapper = XMLWrapper () 
        dom = wrapper.create_document_from_string (text) 
        root = dom.documentElement 
        version = None 
        version = root.getAttribute ('version') 
        if (version == '1.0') : 
            for element in named_elements (root, 'locator') : 
                if (str (element.getAttribute ('type')) == 'file') : 
                    locator = FileLocator.parse (element) 
else : 
                    if (str (element.getAttribute ('type')) == 'db') : 
                        locator = DBLocator.parse (element) 
return locator 
locators = { 
        
} 
    indexFile = open (fileName, 'r') 
    contents = indexFile.read () 
    self.clearTabs () 
    lidx = 0 
    lines = contents.split ('
') 
    tabCount = int (lines [lidx]) 
    lidx += 1 
    for tabIdx in xrange (tabCount) : 
        tabInfo = literal_eval (lines [lidx]) 
        lidx += 1 
        sheet = spreadsheetRegistry.getSheet (tabInfo [1]) (self) 
        sheet.setDimension (tabInfo [2], tabInfo [3]) 
        self.addTabWidget (sheet, tabInfo [0]) 
        while (lines [lidx] != '---') : 
            (r, c, vistrail, pid, cid) = literal_eval (lines [lidx]) 
            locator = vistrail ['locator'] 
            if locators.has_key (locator) : 
                vistrail ['locator'] = locators [locator] 
else : 
                locators [locator] = parse_locator (vistrail ['locator']) 
                vistrail ['locator'] = locators [locator] 
self.appendMonitoredLocations ((vistrail, pid, cid), (sheet, r, c)) 
            lidx += 1 
lidx += 1 
pipelineCount = int (lines [lidx]) 
    lidx += 1 
    self.loadingMode = True 
    progress = QtGui.QProgressDialog ('Loading spreadsheet...', '&Cancel', 0, pipelineCount, self,...

    
    

    Fix the buggy line: locator = c [serializedLocator]
assistant
#Here is Python code to fix the buggy line: locator = c [serializedLocator]
.

locator = locators [serializedLocator]