diff --git a/jupytext/header.py b/jupytext/header.py index b477b5550..c23ff7259 100644 --- a/jupytext/header.py +++ b/jupytext/header.py @@ -173,7 +173,7 @@ def header_to_metadata_and_cell(lines, header_prefix, ext=None): if _JUPYTER_RE.match(line): injupyter = True - elif not _LEFTSPACE_RE.match(line): + elif line and not _LEFTSPACE_RE.match(line): injupyter = False if injupyter: