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-rw-r--r--fg21sim/utils/io.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/fg21sim/utils/io.py b/fg21sim/utils/io.py
index 1d30b23..4f05e96 100644
--- a/fg21sim/utils/io.py
+++ b/fg21sim/utils/io.py
@@ -20,6 +20,10 @@ def _create_dir(filepath):
"""
Check the existence of the target directory, and create it if necessary.
+ NOTE
+ ----
+ If the given ``filepath`` is simply the filename without any directory
+ path, then just returns.
"""
dirname = os.path.dirname(filepath)
# ``dirname == ""`` if ``filepath`` does not contain directory path