Add docstring to tmv

1 files changed, 8 insertions, 0 deletions

diff --git a/patternutils/commands/tmv.py b/patternutils/commands/tmv.py
index 145a261..3f618d2 100644
--- a/patternutils/commands/tmv.py
+++ b/patternutils/commands/tmv.py
@@ -47,6 +47,14 @@ def tmv(
     verbose: bool,
 ) -> None:
 
+    """Rename files based on the OUTPUT_PATTERN.
+
+       It read a JSON list containing objects. The object needs to have a
+       key named _abspath, which points to the file to move. The rest of the
+       keys will be supplied to the templating engine to generate the new
+       filename.
+    """
+
     try:
         data = json.load(read_from)  # type: ignore
     except json.JSONDecodeError: