Python PyQt - QTableWidget, JSON, and emitSignal causing blank cells

Question

I am using PyQt for a simple application that reads from a log file with JSON formatted strings, and outputs them nicely in a table.

Everything is working as expected e

Answer 1

I've been working on something similar, but was not setting up a sort. I tried both ways, and both worked for me.

My list, is a list of dictionaries, so slightly different from yours.

I have created a tabledialog class, that contains my table widget, and this function, is called from my main window:

def setuptable(self, alist):

    # setup variables
    rows = len(alist)
    cols = len(alist[0])
    keys = ['number', 'name', 'phone', 'address'] # for dictonary order

    # setup cols, rows
    self.tableWidget.setRowCount(rows)
    self.tableWidget.setColumnCount(cols)

    # insert data
    for row in range(rows):
        for col in range(cols):
            item = QtGui.QTableWidgetItem()
            item.setText(alist[row][keys[col]] or '') # or '' for any None values
            table.setItem(row, col, item)

    keys = [item.title() for item in keys]  # capitalize
    self.tableWidget.setHorizontalHeaderLabels(keys) # add header names
    self.tableWidget.horizontalHeader().setDefaultAlignment(QtCore.Qt.AlignLeft) # set alignment
    self.tableWidget.resizeColumnsToContents() # call this after all items have been inserted

    self.tableWidget.sortItems(1,QtCore.Qt.AscendingOrder)

Also tried using, at the end of my tablesetup function:

self.emit(QtCore.SIGNAL("loadingDone"))

and setup the slot in my main window, in the init section:

# setup the dialog
import dialogtable
self.tabledialog = dialogtable.dialogtable()

# signal from table dialog
self.tabledialog.connect(self.tabledialog,QtCore.SIGNAL("loadingDone"),self.tableSort)

And the function called:

def tableSort(self):
    self.tabledialog.tableWidget.sortItems(1,QtCore.Qt.AscendingOrder)

My tablewidget setup functions:

    # set table widget attributes
    self.tableWidget.setEditTriggers(QtGui.QAbstractItemView.DoubleClicked) # use NoEditTriggers to disable editing
    self.tableWidget.setAlternatingRowColors(True)
    self.tableWidget.setSelectionMode(QtGui.QAbstractItemView.NoSelection)
    self.tableWidget.verticalHeader().setDefaultSectionSize(18) # tighten up the row size
    self.tableWidget.horizontalHeader().setStretchLastSection(True) # stretch last column to edge
    self.tableWidget.setSortingEnabled(True) # allow sorting

I don't bother ever set sorting to false, as the answer above mine recommends.