How to populate wxpython LIstCtrl with OnClick event - python-2.7

Question

I want to design a wxpython ListCtrl. So when the Search button is clicked i am getting list like this
[(7, u'GLUOCOSE', u'C6H1206'), (8, u'SUCROSE', u'C12H22O11')]
I want to populate the listctrl with the above output. I am InsertStringItem method, which will return me the index of current row and rest of the columns are filled by SetStringItem() method.But that gives me TypeError: String or Unicode type required.How do i accomplish this?
def OnSearch(self, event):
placeholder = '?'
placeholders = ','.join(placeholder for unused in self.molecule_list)
query = 'SELECT * FROM MOLECULE WHERE MOL_NUMBER IN (%s)' % placeholders
cursor = self.conn.execute(query, self.molecule_list)
final = cursor.fetchall()
print final
for j in final:
index = self.list.InsertStringItem(sys.maxint, j[0])
self.list.SetStringItem(index, 1, j[1])
self.list.SetStringItem(index, 2, j[2])

Answer 1

You are iterating over the cursor, rather than the data which was returned in the variable final. Swap over to iterate using final
index = 0
for j in final:
index = self.list.InsertStringItem(index, str(j[0]))
self.list.SetStringItem(index, 1, j[1])
self.list.SetStringItem(index, 2, j[2])
index +=1
The easiest way, is to ensure that the ListCtrl has a style=wx.LC_REPORT and then use Append.
for j in final:
self.list.Append((j[0],j[1],j[2],j[3]))
Where j[n] is each item you require from the data for the number of items in the ListCtrl. I hope that makes sense.
Here is an example showing both methods
import wx
class MyForm(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, None, wx.ID_ANY, "Molecules")
panel = wx.Panel(self, wx.ID_ANY)
self.index = 0
self.list_ctrl = wx.ListCtrl(panel, size=(-1,100),
style=wx.LC_REPORT
)
self.list_ctrl.InsertColumn(0, 'Number')
self.list_ctrl.InsertColumn(1, 'Element')
self.list_ctrl.InsertColumn(2, 'Make up')
btn = wx.Button(panel, label="Add data")
btn.Bind(wx.EVT_BUTTON, self.add_lines)
btn2 = wx.Button(panel, label="Append data")
btn2.Bind(wx.EVT_BUTTON, self.app_lines)
sizer = wx.BoxSizer(wx.VERTICAL)
sizer.Add(self.list_ctrl, 0, wx.ALL|wx.EXPAND, 5)
sizer.Add(btn, 0, wx.ALL|wx.CENTER, 5)
sizer.Add(btn2, 0, wx.ALL|wx.CENTER, 5)
panel.SetSizer(sizer)
def add_lines(self, event):
data = [[7, 'GLUCOSE', 'C6H1206'],[8,'SUCROSE', 'C12H22O11']]
index = 0
for j in data:
self.list_ctrl.InsertStringItem(index, str(j[0]))
self.list_ctrl.SetStringItem(index, 1, j[1])
self.list_ctrl.SetStringItem(index, 2, j[2])
index += 1
def app_lines(self, event):
data = [[7, 'GLUCOSE', 'C6H1206'],[8,'SUCROSE', 'C12H22O11']]
for j in data:
self.list_ctrl.Append((j[0],j[1],j[2]))
if __name__ == "__main__":
app = wx.App(False)
frame = MyForm()
frame.Show()
app.MainLoop()