def test_table_exists(tmp_path):
ms_path = tmp_path / "test.ms"
ms_path.mkdir(parents=True, exist_ok=False)
assert table_exists(str(ms_path)) is True
ant_path = ms_path / "ANTENNA"
ant_path.mkdir(parents=True, exist_ok=False)
# Both the directory and canonical subtable access forms work
assert table_exists(str(ant_path))
assert table_exists('::'.join((str(ms_path), "ANTENNA")))
def __init__(self, table, select_cols, group_cols, index_cols, **kwargs):
if not table_exists(table):
raise ValueError("'%s' does not appear to be a CASA Table" % table)
chunks = kwargs.pop('chunks', [{'row': _DEFAULT_ROW_CHUNKS}])
# Create or promote chunks to a list of dicts
if isinstance(chunks, dict):
chunks = [chunks]
elif not isinstance(chunks, (tuple, list)):
raise TypeError("'chunks' must be a dict or sequence of dicts")
self.canonical_name = table
self.table_path = str(Path(*table_path_split(table)))
self.select_cols = select_cols
self.group_cols = [] if group_cols is None else group_cols
self.index_cols = [] if index_cols is None else index_cols
self.chunks = chunks
self.table_schema = kwargs.pop('table_schema', None)
self.taql_where = kwargs.pop('taql_where', '')
self.table_keywords = kwargs.pop('table_keywords', False)
self.column_keywords = kwargs.pop('column_keywords', False)
self.table_proxy = kwargs.pop('table_proxy', False)
if len(kwargs) > 0:
raise ValueError("Unhandled kwargs: %s" % kwargs)
def write_datasets(table,
datasets,
columns,
descriptor=None,
table_keywords=None,
column_keywords=None):
# Promote datasets to list
if isinstance(datasets, tuple):
datasets = list(datasets)
elif not isinstance(datasets, list):
datasets = [datasets]
# If ALL is requested
if columns == "ALL":
columns = list(set(ds.data_vars.keys()) for ds in datasets)
if len(columns) > 0:
columns = list(sorted(set.union(*columns)))
if not table_exists(table):
table_proxy = _create_table(table, datasets, columns, descriptor)
else:
table_proxy = _updated_table(table, datasets, columns, descriptor)
return _write_datasets(table,
table_proxy,
datasets,
columns,
descriptor=descriptor,
table_keywords=table_keywords,
column_keywords=column_keywords)