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rhettinger merged 1 commit into from
Nov 12, 2019
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bpo-38771 #17108

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2 changes: 1 addition & 1 deletion Doc/library/collections.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -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}
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@rhettinger rhettinger Nov 12, 2019

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I think reads better without the space before v.


combined = ChainMap(command_line_args, os.environ, defaults)
print(combined['color'])
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