---
source: crates/ruff_python_parser/tests/fixtures.rs
input_file: crates/ruff_python_parser/resources/inline/err/walrus_py37.py
---
## AST

```
Module(
    ModModule {
        node_index: AtomicNodeIndex(..),
        range: 0..54,
        body: [
            Expr(
                StmtExpr {
                    node_index: AtomicNodeIndex(..),
                    range: 45..53,
                    value: Named(
                        ExprNamed {
                            node_index: AtomicNodeIndex(..),
                            range: 46..52,
                            target: Name(
                                ExprName {
                                    node_index: AtomicNodeIndex(..),
                                    range: 46..47,
                                    id: Name("x"),
                                    ctx: Store,
                                },
                            ),
                            value: NumberLiteral(
                                ExprNumberLiteral {
                                    node_index: AtomicNodeIndex(..),
                                    range: 51..52,
                                    value: Int(
                                        1,
                                    ),
                                },
                            ),
                        },
                    ),
                },
            ),
        ],
    },
)
```
## Unsupported Syntax Errors

  |
1 | # parse_options: { "target-version": "3.7" }
2 | (x := 1)
  |  ^^^^^^ Syntax Error: Cannot use named assignment expression (`:=`) on Python 3.7 (syntax was added in Python 3.8)
  |