def import_datasets(self, filenames, importer, progresslist=None, undolist=None):
if undolist is None:
undolist = self.journal
if isinstance(importer, basestring):
importer = ImporterRegistry.new_instance(importer)
elif not isinstance(importer, Importer):
raise TypeError("'importer' needs to be a key or a valid Importer instance.")
# To ensure a proper undo, the Datasets are imported one by one
# to a temporary dict. When finished, they are added as a whole.
new_datasets = list()
progresslist = progresslist or self.app.progresslist
pl = progresslist(filenames)
for filename in pl:
try:
tbl = importer.read_table_from_file(filename)
except ImportError, msg:
pl.fail(msg)
continue
root, ext = os.path.splitext(basename(filename))
filename = utils.encode_as_key(root)
ds = Dataset(key=filename, data=tbl)
ds.metadata['Import-Source'] = unicode(filename)
ds.metadata['Import-Filter'] = unicode(importer.blurb)
new_datasets.append(ds)
pl.succeed()
n = 0.0
N = len(filenames)
for filename in filenames:
yield ("Importing %s" % filename, n/N)
try:
tbl = importer.read_table_from_file(filename)
except ImportError, msg:
self.error_message(msg)
continue
except error.UserCancel:
self.error_message("Import aborted by user")
continue
root, ext = os.path.splitext(os.path.basename(filename))
filename = utils.encode_as_key(root)
ds = Dataset(key=filename, data=tbl)
ds.metadata['Import-Source'] = unicode(filename)
ds.metadata['Import-Filter'] = unicode(importer.blurb)
new_datasets.append(ds)
n+=1
yield (None,n/N)
yield (-1,None)
if len(new_datasets) > 0:
ul = UndoList().describe("Import Dataset(s)")
project.add_datasets(new_datasets, undolist=ul)
undolist.append(ul)
N = len(filenames)
app.progress(0.0)
for filename in filenames:
app.status_msg("Importing %s" % filename)
try:
importer = template.new_instance()
ds = importer.read_dataset_from_file(filename)
except dataio.ImportError, msg:
app.error_msg(msg)
continue
except error.UserCancel:
app.error_msg("Import aborted by user")
continue
root, ext = os.path.splitext(os.path.basename(filename))
ds.key = utils.encode_as_key(root)
new_datasets.append(ds)
n+=1
app.progress(n/N)
app.progress(1.0)
if len(new_datasets) > 0:
ul = UndoList()
if len(new_datasets) == 1:
ul.describe("Import Dataset")
else:
ul.describe("Import %d Datasets" % len(new_datasets) )
project.add_datasets(new_datasets, undolist=ul)