Add --list-thumbnails

1 files changed, 8 insertions, 0 deletions

diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index d22b03134..b8c52af74 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -1659,3 +1659,11 @@ def determine_protocol(info_dict):
         return 'f4m'
 
     return compat_urllib_parse_urlparse(url).scheme
+
+
+def render_table(header_row, data):
+    """ Render a list of rows, each as a list of values """
+    table = [header_row] + data
+    max_lens = [max(len(compat_str(v)) for v in col) for col in zip(*table)]
+    format_str = ' '.join('%-' + compat_str(ml + 1) + 's' for ml in max_lens[:-1]) + '%s'
+    return '\n'.join(format_str % tuple(row) for row in table)