common_prefix = name[:name.rfind('/') + 1]
else:
while not name.startswith(common_prefix):
- common_prefix = name[:name.rfind('/') + 1]
+ last_slash = common_prefix[:-1].rfind('/') + 1
+ common_prefix = common_prefix[:last_slash]
mark[name] = ':' + str(next_mark)
next_mark += 1