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Use to handle legacy async/await handling in assert_equivalent

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Łukasz Langa 2019-05-08 23:33:39 +02:00
parent f5381c7c5f
commit 6bb90f22ed
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GPG Key ID: B26995E310250568
1 changed files with 11 additions and 8 deletions
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black.py
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@ -3382,9 +3382,14 @@ def __str__(self) -> str:
def parse_ast(src: str) -> Union[ast3.AST, ast27.AST]: def parse_ast(src: str) -> Union[ast3.AST, ast27.AST]:
for feature_version in (7, 6):
try: try:
return ast3.parse(src) print(f"-- 3.{feature_version}")
return ast3.parse(src, feature_version=feature_version)
except SyntaxError: except SyntaxError:
continue
print(f"-- 2.7")
return ast27.parse(src) return ast27.parse(src)
@ -3438,11 +3443,9 @@ def _v(node: Union[ast3.AST, ast27.AST], depth: int = 0) -> Iterator[str]:
try: try:
src_ast = parse_ast(src) src_ast = parse_ast(src)
except Exception as exc: except Exception as exc:
major, minor = sys.version_info[:2]
raise AssertionError( raise AssertionError(
f"cannot use --safe with this file; failed to parse source file " f"cannot use --safe with this file; failed to parse source file. "
f"with Python {major}.{minor}'s builtin AST. Re-run with --fast " f"AST error message: {exc}"
f"or stop using deprecated Python 2 syntax. AST error message: {exc}"
) )
try: try: