utils/io.py: Fix issue in "_create_dir()" with empty directory path

Signed-off-by: Aaron LI <aly@aaronly.me>

1 files changed, 3 insertions, 1 deletions

diff --git a/fg21sim/utils/io.py b/fg21sim/utils/io.py
index c19ef47..1d30b23 100644
--- a/fg21sim/utils/io.py
+++ b/fg21sim/utils/io.py
@@ -19,9 +19,11 @@ logger = logging.getLogger(__name__)
 def _create_dir(filepath):
     """
     Check the existence of the target directory, and create it if necessary.
+
     """
     dirname = os.path.dirname(filepath)
-    if not os.path.exists(dirname):
+    # ``dirname == ""`` if ``filepath`` does not contain directory path
+    if dirname and not os.path.exists(dirname):
         os.makedirs(dirname)
         logger.info("Created output directory: {0}".format(dirname))