diff options
| -rw-r--r-- | Doc/library/collections.rst | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst index 90a3f4b..a5e8d04 100644 --- a/Doc/library/collections.rst +++ b/Doc/library/collections.rst @@ -162,7 +162,7 @@ environment variables which in turn take precedence over default values:: parser.add_argument('-u', '--user') parser.add_argument('-c', '--color') namespace = parser.parse_args() - command_line_args = {k:v for k, v in vars(namespace).items() if v} + command_line_args = {k: v for k, v in vars(namespace).items() if v is not None} combined = ChainMap(command_line_args, os.environ, defaults) print(combined['color']) |