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argparse: work around bad default in py 3.7.0a/b/rc, fixes #3996 

(cherry picked from commit 52f1cd4bc6)
This commit is contained in:
Thomas Waldmann 2018-07-30 01:02:25 +01:00
parent 64f2fc0a65
commit 02dbe5fd5c
1 changed files with 7 additions and 1 deletions
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6
src/borg/testsuite/archiver.py
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@ -3673,6 +3673,12 @@ class TestCommonOptions:
@pytest.fixture @pytest.fixture
def subparsers(self, basic_parser): def subparsers(self, basic_parser):
if sys.version_info >= (3, 7):
# py37 pre-release defaults to unwanted required=True, in 3.7.0+ it was fixed to =False
return basic_parser.add_subparsers(title='required arguments', metavar='<command>', required=False)
else:
# py36 does not support required=... argument (but behaves like required=False).
# note: use below call for 3.6 and 3.7 when there are no alphas/betas/RCs of 3.7.0 around any more.
return basic_parser.add_subparsers(title='required arguments', metavar='<command>') return basic_parser.add_subparsers(title='required arguments', metavar='<command>')
@pytest.fixture @pytest.fixture