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bpo-35975: Support parsing earlier minor versions of Python 3 (python…
…GH-12086) This adds a `feature_version` flag to `ast.parse()` (documented) and `compile()` (hidden) that allow tweaking the parser to support older versions of the grammar. In particular if `feature_version` is 5 or 6, the hacks for the `async` and `await` keyword from PEP 492 are reinstated. (For 7 or higher, these are unconditionally treated as keywords, but they are still special tokens rather than `NAME` tokens that the parser driver recognizes.) https://bugs.python.org/issue35975
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Original file line number | Diff line number | Diff line change |
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@@ -55,6 +55,8 @@ ELLIPSIS '...' | |
COLONEQUAL ':=' | ||
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||
OP | ||
AWAIT | ||
ASYNC | ||
TYPE_IGNORE | ||
TYPE_COMMENT | ||
ERRORTOKEN | ||
|
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