def _try_load(self):
self._initialize_reader_combo()
# pylint: disable=broad-except
if self.source == self.LOCAL_FILE:
if self.last_path() is None:
return self.Information.no_file_selected
elif not os.path.exists(self.last_path()):
return self.Error.file_not_found
else:
url = self.url_combo.currentText().strip()
if not url:
return self.Information.no_file_selected
def mark_problematic_reader():
self.reader_combo.setItemData(self.reader_combo.currentIndex(),
QBrush(Qt.red), Qt.ForegroundRole)
try:
self.reader = self._get_reader() # also sets current reader index
assert self.reader is not None
except MissingReaderException:
mark_problematic_reader()
return self.Error.missing_reader
except Exception as ex:
mark_problematic_reader()
log.exception(ex)
return lambda x=ex: self.Error.unknown(str(x))
try:
self._update_sheet_combo()
except Exception:
return self.Error.sheet_error
with log_warnings() as warnings:
try:
data = self.reader.read()
except Exception as ex:
mark_problematic_reader()
log.exception(ex)
return lambda x=ex: self.Error.unknown(str(x))
if warnings:
self.Warning.load_warning(warnings[-1].message.args[0])
self.infolabel.setText(self._describe(data))
self.loaded_file = self.last_path()
add_origin(data, self.loaded_file)
self.data = data
self.openContext(data.domain)
self.apply_domain_edit() # sends data
return None
def _try_load(self):
# pylint: disable=broad-except
if self.last_path() and not os.path.exists(self.last_path()):
return self.Error.file_not_found
try:
self.reader = self._get_reader()
assert self.reader is not None
except Exception:
return self.Error.missing_reader
if self.reader is self.NoFileSelected:
self.Outputs.data.send(None)
self.info.set_output_summary(self.info.NoOutput)
return None
try:
self._update_sheet_combo()
except Exception:
return self.Error.sheet_error
with log_warnings() as warnings:
try:
data = self.reader.read()
except Exception as ex:
log.exception(ex)
return lambda x=ex: self.Error.unknown(str(x))
if warnings:
self.Warning.load_warning(warnings[-1].message.args[0])
self.infolabel.setText(self._describe(data))
self.loaded_file = self.last_path()
add_origin(data, self.loaded_file)
self.data = data
self.openContext(data.domain)
self.apply_domain_edit() # sends data
return None