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---
source: crates/ruff_python_parser/tests/fixtures.rs
input_file: crates/ruff_python_parser/resources/inline/err/pep701_nested_interpolation_py311.py
---
## AST
```
Module(
ModModule {
node_index: NodeIndex(None),
range: 0..138,
body: [
Expr(
StmtExpr {
node_index: NodeIndex(None),
range: 92..114,
value: FString(
ExprFString {
node_index: NodeIndex(None),
range: 92..114,
value: FStringValue {
inner: Single(
FString {
range: 92..114,
node_index: NodeIndex(None),
elements: [
Interpolation(
InterpolatedElement {
range: 94..113,
node_index: NodeIndex(None),
expression: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 95..96,
value: Int(
1,
),
},
),
debug_text: None,
conversion: None,
format_spec: Some(
InterpolatedStringFormatSpec {
range: 97..112,
node_index: NodeIndex(None),
elements: [
Literal(
InterpolatedStringLiteralElement {
range: 97..104,
node_index: NodeIndex(None),
value: " abcd \"",
},
),
Interpolation(
InterpolatedElement {
range: 104..110,
node_index: NodeIndex(None),
expression: StringLiteral(
ExprStringLiteral {
node_index: NodeIndex(None),
range: 105..109,
value: StringLiteralValue {
inner: Single(
StringLiteral {
range: 105..109,
node_index: NodeIndex(None),
value: "aa",
flags: StringLiteralFlags {
quote_style: Single,
prefix: Empty,
triple_quoted: false,
unclosed: false,
},
},
),
},
},
),
debug_text: None,
conversion: None,
format_spec: None,
},
),
Literal(
InterpolatedStringLiteralElement {
range: 110..112,
node_index: NodeIndex(None),
value: "\" ",
},
),
],
},
),
},
),
],
flags: FStringFlags {
quote_style: Single,
prefix: Regular,
triple_quoted: false,
unclosed: false,
},
},
),
},
},
),
},
),
Expr(
StmtExpr {
node_index: NodeIndex(None),
range: 115..137,
value: FString(
ExprFString {
node_index: NodeIndex(None),
range: 115..137,
value: FStringValue {
inner: Single(
FString {
range: 115..137,
node_index: NodeIndex(None),
elements: [
Interpolation(
InterpolatedElement {
range: 117..136,
node_index: NodeIndex(None),
expression: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 118..119,
value: Int(
1,
),
},
),
debug_text: None,
conversion: None,
format_spec: Some(
InterpolatedStringFormatSpec {
range: 120..135,
node_index: NodeIndex(None),
elements: [
Literal(
InterpolatedStringLiteralElement {
range: 120..127,
node_index: NodeIndex(None),
value: " abcd \"",
},
),
Interpolation(
InterpolatedElement {
range: 127..133,
node_index: NodeIndex(None),
expression: StringLiteral(
ExprStringLiteral {
node_index: NodeIndex(None),
range: 128..132,
value: StringLiteralValue {
inner: Single(
StringLiteral {
range: 128..132,
node_index: NodeIndex(None),
value: "\n",
flags: StringLiteralFlags {
quote_style: Double,
prefix: Empty,
triple_quoted: false,
unclosed: false,
},
},
),
},
},
),
debug_text: None,
conversion: None,
format_spec: None,
},
),
Literal(
InterpolatedStringLiteralElement {
range: 133..135,
node_index: NodeIndex(None),
value: "\" ",
},
),
],
},
),
},
),
],
flags: FStringFlags {
quote_style: Single,
prefix: Regular,
triple_quoted: false,
unclosed: false,
},
},
),
},
},
),
},
),
],
},
)
```
## Unsupported Syntax Errors
|
1 | # parse_options: {"target-version": "3.11"}
2 | # nested interpolations also need to be checked
3 | f'{1: abcd "{'aa'}" }'
| ^ Syntax Error: Cannot reuse outer quote character in f-strings on Python 3.11 (syntax was added in Python 3.12)
4 | f'{1: abcd "{"\n"}" }'
|
|
2 | # nested interpolations also need to be checked
3 | f'{1: abcd "{'aa'}" }'
4 | f'{1: abcd "{"\n"}" }'
| ^ Syntax Error: Cannot use an escape sequence (backslash) in f-strings on Python 3.11 (syntax was added in Python 3.12)