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---
source: crates/ruff_python_parser/tests/fixtures.rs
input_file: crates/ruff_python_parser/resources/inline/err/debug_shadow_function.py
---
## AST
```
Module(
ModModule {
node_index: NodeIndex(None),
range: 0..170,
body: [
FunctionDef(
StmtFunctionDef {
node_index: NodeIndex(None),
range: 0..20,
is_async: false,
decorator_list: [],
name: Identifier {
id: Name("__debug__"),
range: 4..13,
node_index: NodeIndex(None),
},
type_params: None,
parameters: Parameters {
range: 13..15,
node_index: NodeIndex(None),
posonlyargs: [],
args: [],
vararg: None,
kwonlyargs: [],
kwarg: None,
},
returns: None,
body: [
Expr(
StmtExpr {
node_index: NodeIndex(None),
range: 17..20,
value: EllipsisLiteral(
ExprEllipsisLiteral {
node_index: NodeIndex(None),
range: 17..20,
},
),
},
),
],
},
),
FunctionDef(
StmtFunctionDef {
node_index: NodeIndex(None),
range: 38..61,
is_async: false,
decorator_list: [],
name: Identifier {
id: Name("f"),
range: 42..43,
node_index: NodeIndex(None),
},
type_params: Some(
TypeParams {
range: 43..54,
node_index: NodeIndex(None),
type_params: [
TypeVar(
TypeParamTypeVar {
node_index: NodeIndex(None),
range: 44..53,
name: Identifier {
id: Name("__debug__"),
range: 44..53,
node_index: NodeIndex(None),
},
bound: None,
default: None,
},
),
],
},
),
parameters: Parameters {
range: 54..56,
node_index: NodeIndex(None),
posonlyargs: [],
args: [],
vararg: None,
kwonlyargs: [],
kwarg: None,
},
returns: None,
body: [
Expr(
StmtExpr {
node_index: NodeIndex(None),
range: 58..61,
value: EllipsisLiteral(
ExprEllipsisLiteral {
node_index: NodeIndex(None),
range: 58..61,
},
),
},
),
],
},
),
FunctionDef(
StmtFunctionDef {
node_index: NodeIndex(None),
range: 85..106,
is_async: false,
decorator_list: [],
name: Identifier {
id: Name("f"),
range: 89..90,
node_index: NodeIndex(None),
},
type_params: None,
parameters: Parameters {
range: 90..101,
node_index: NodeIndex(None),
posonlyargs: [],
args: [
ParameterWithDefault {
range: 91..100,
node_index: NodeIndex(None),
parameter: Parameter {
range: 91..100,
node_index: NodeIndex(None),
name: Identifier {
id: Name("__debug__"),
range: 91..100,
node_index: NodeIndex(None),
},
annotation: None,
},
default: None,
},
],
vararg: None,
kwonlyargs: [],
kwarg: None,
},
returns: None,
body: [
Expr(
StmtExpr {
node_index: NodeIndex(None),
range: 103..106,
value: EllipsisLiteral(
ExprEllipsisLiteral {
node_index: NodeIndex(None),
range: 103..106,
},
),
},
),
],
},
),
Expr(
StmtExpr {
node_index: NodeIndex(None),
range: 125..144,
value: Lambda(
ExprLambda {
node_index: NodeIndex(None),
range: 125..144,
parameters: Some(
Parameters {
range: 132..141,
node_index: NodeIndex(None),
posonlyargs: [],
args: [
ParameterWithDefault {
range: 132..141,
node_index: NodeIndex(None),
parameter: Parameter {
range: 132..141,
node_index: NodeIndex(None),
name: Identifier {
id: Name("__debug__"),
range: 132..141,
node_index: NodeIndex(None),
},
annotation: None,
},
default: None,
},
],
vararg: None,
kwonlyargs: [],
kwarg: None,
},
),
body: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 143..144,
value: Int(
0,
),
},
),
},
),
},
),
],
},
)
```
## Semantic Syntax Errors
|
1 | def __debug__(): ... # function name
| ^^^^^^^^^ Syntax Error: cannot assign to `__debug__`
2 | def f[__debug__](): ... # type parameter name
3 | def f(__debug__): ... # parameter name
|
|
1 | def __debug__(): ... # function name
2 | def f[__debug__](): ... # type parameter name
| ^^^^^^^^^ Syntax Error: cannot assign to `__debug__`
3 | def f(__debug__): ... # parameter name
4 | lambda __debug__: 0 # lambda parameter name
|
|
1 | def __debug__(): ... # function name
2 | def f[__debug__](): ... # type parameter name
3 | def f(__debug__): ... # parameter name
| ^^^^^^^^^ Syntax Error: cannot assign to `__debug__`
4 | lambda __debug__: 0 # lambda parameter name
|
|
2 | def f[__debug__](): ... # type parameter name
3 | def f(__debug__): ... # parameter name
4 | lambda __debug__: 0 # lambda parameter name
| ^^^^^^^^^ Syntax Error: cannot assign to `__debug__`
|