On 09/02/2016 11:57, c...@isbd.net wrote:
I have the following code snippet populating a wxPython grid with data
from a database. :-
#
#
# populate grid with data
#
all = self.cur.execute("SELECT * from " + table + " ORDER by id ")
for row in all:
row_num = row[0]
cells = row[1:]
for col in range(len(cells)):
if cells[col] != None and cells[col] != "null":
xx = cells[col]
if not isinstance(xx, basestring):
xx = str(xx)
print("row: ",row_num, "col: ", col, "value: ", xx)
The usual way of writing the above loop is:-
for cell in cells:
if cell != None and cell != "null":
xx = cell
if not isinstance(xx, basestring):
xx = str(xx)
self.SetCellValue(row_num, col, xx)
It works fine until it hits an invalid character in one of the
columns. The print is just a temporary diagnostic.
The output I get, when it hits an invalid character is:-
('row: ', 5814, 'col: ', 9, 'value: ', u'')
('row: ', 5814, 'col: ', 10, 'value: ', '10.5')
('row: ', 5814, 'col: ', 11, 'value: ', u'')
('row: ', 5814, 'col: ', 12, 'value: ', u' Fuel (with inter-tank tap open)
is at about 10.5 - 11cm in the sight glass before setting out.')
('row: ', 6186, 'col: ', 0, 'value: ', '0')
Traceback (most recent call last):
File "/home/chris/bin/pg.py", line 100, in <module>
grid = Grid(frame, dbCon, table)
File "/home/chris/bin/pg.py", line 52, in __init__
self.SetCellValue(row_num, col, xx)
File "/usr/lib/python2.7/dist-packages/wx-3.0-gtk2/wx/grid.py", line
2016, in SetCellValue
return _grid.Grid_SetCellValue(*args, **kwargs)
sqlite3.OperationalError: Could not decode to UTF-8 column 'dayno' with
text '�'
It's absolutely right, there is a non-UTF character in the column.
However I don't want to have to clean up the data, it would take
rather a long time. How can I trap the error and just put a Null or
zero in the datagrid?
Where do I put the try:/except: ?
The rule is always keep the try/except to the bare minimum hence.
try:
self.SetCellValue(row_num, col, xx)
except sqlite3.OperationalError:
doSomething()
--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.
Mark Lawrence
--
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