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Use "feature detection" for 3.8 compat (#3278)

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This commit is contained in:
Adrian Sampson 2019-05-30 18:14:40 -04:00
parent 4ebb118f5f
commit ade1df52a2
1 changed files with 9 additions and 14 deletions
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23
beets/util/functemplate.py
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@ -125,21 +125,16 @@ def compile_func(arg_names, statements, name='_the_func', debug=False):
kwarg=None,
defaults=[ex_literal(None) for _ in arg_names],
)
elif sys.version_info >= (3, 8):
args = ast.arguments(
args=[ast.arg(arg=n, annotation=None) for n in arg_names],
posonlyargs=[],
kwonlyargs=[],
kw_defaults=[],
defaults=[ex_literal(None) for _ in arg_names],
)
else:
args = ast.arguments(
args=[ast.arg(arg=n, annotation=None) for n in arg_names],
kwonlyargs=[],
kw_defaults=[],
defaults=[ex_literal(None) for _ in arg_names],
)
args_fields = {
'args': [ast.arg(arg=n, annotation=None) for n in arg_names],
'kwonlyargs': [],
'kw_defaults': [],
'defaults': [ex_literal(None) for _ in arg_names],
}
if 'posonlyargs' in ast.arguments._fields: # Added in Python 3.8.
args_fields['posonlyargs'] = []
args = ast.arguments(**args_fields)
func_def = ast.FunctionDef(
name=name,