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Datasets:
Gugu8
/
Code-Syntax-Expanded

Modalities:
Text
Formats:
csv
Languages:
English
Size:
10M - 100M
Tags:
Synthetic
code
Libraries:
Datasets
pandas
Polars
License:
Dataset card Data Studio Files
xet
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1
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wrong_code
stringlengths
3
123
correct_code
stringlengths
3
155
explanation
stringclasses
101 values
language
stringclasses
26 values
Write-Host 'result'
Write-Host 'result'
Correct.
PowerShell
for x in range(67) print(x)
for x in range(67): print(x)
Colon after for.
Python
var x = 50;
var x = 50;
Correct.
Dart
if num = 99
if num == 99
Use ==.
Ruby
div {{ color=green; }}
div {{ color: green; }}
Use colon.
CSS
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
DELETE FROM orders WHERE id=84
DELETE FROM orders WHERE id=84;
Add semicolon.
SQL
if ($bar = 18)
if ($bar == 18)
Use ==.
Perl
<hr></hr>
<hr>
Self-closing.
HTML
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
title: test name: test,
title: test name: test
Remove comma.
YAML
cin >> bar cout << bar;
cin >> bar; cout << bar;
Add semicolon.
C++
for i=1,1 do print(i) end
for i=1,1 do print(i) end
Correct.
Lua
if (y = 33)
if (y == 33)
Use ==.
C++
print('info')
print('info')
Correct.
R
val temp: Int = 'message'
val temp: String = 'message'
Fix type.
Kotlin
a = 72
a=72
No spaces.
Shell
let result: number = 'info';
let result: string = 'info';
Fix type.
TypeScript
class = 'test'
class_name = 'test'
'class' is a keyword.
Python
92result = 10
result92 = 10
Variable cannot start with digit.
Python
if count = 42 then print('test') end
if count == 42 then print('test') end
Use ==.
Lua
[38, 87, 22
[38, 87, 22]
Close bracket.
Ruby
data[64]
if (data.indices.contains(64)) data[64]
Check index.
Kotlin
println('info')
println("info")
Double quotes.
Scala
items(99)
if length(items) >= 99, items(99), end
Check length.
MATLAB
sys.sqrt(63)
import sys sys.sqrt(63)
Import module first.
Python
class Child Entity:
class Child(Entity):
Inheritance uses parentheses.
Python
const http = require('http'); http.createServer((req,res) => res.end('data')).listen(64);
const http = require('http'); http.createServer((req,res) => res.end('data')).listen(64);
Correct.
Node.js
x == '29'
x === 29
Use strict equality.
JavaScript
echo 'value'
echo 'value';
Add semicolon.
PHP
var x int
var x int
Correct.
Go
compute
compute()
Add parentheses.
Swift
<a href='https://test.org' target='_blank'>
<a href='https://test.org' target='_blank' rel='noopener'>
Add rel for security.
HTML
const count = 53; count = 28;
let count = 53; count = 28;
Cannot reassign const.
JavaScript
x := 85
x := 85
Correct.
Go
def compute puts 'world' end
def compute puts 'world' end
Correct.
Ruby
fs.readFile('data.txt', (err,data) => {{ if(err) throw err; }});
fs.readFile('data.txt', (err,data) => {{ if(err) {{ console.error(err); return; }} }});
Better error handling.
Node.js
assert num > 4
assert num > 4
Correct.
Python
if foo > 31 puts 'info'
if foo > 31 puts 'info' end
Add 'end'.
Ruby
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
$values[3] = 5;
if (isset($values[3])) $values[3] = 5;
Check existence.
PHP
<br></br>
<br>
Self-closing.
HTML
'data' + 38
'data' + str(38)
Can't add int to string.
Python
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
if (y = 50) {{}}
if (y === 50) {{}}
Use === for equality.
JavaScript
let val = 64;
let val = 64;
Correct.
JavaScript
int[] list = new int[77]; list[77] = 5;
int[] list = new int[77]; if (77 < list.length) list[77] = 5;
Check bounds.
Java
SELECT * FROM products WHRE email=34;
SELECT * FROM products WHERE email=34;
Fix WHERE.
SQL
void main() {{ print('hello') }}
void main() {{ print('hello'); }}
Add semicolon.
Dart
values[58]
if (length(values) >= 58) values[58]
Check length.
R
let b = 53; b += 1;
let mut b = 53; b += 1;
Need mut to modify.
Rust
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
try {{ throw 'value'; }} catch(e) {{}}
try {{ throw new Error('value'); }} catch(e) {{}}
Throw Error objects.
JavaScript
if (y = 93) {{}}
if (y == 93) {{}}
Use ==.
Kotlin
val bar = 'data'
val bar = "data"
Double quotes.
Kotlin
def render(): print('test')
def render(): print('test')
Indent function body.
Python
class Order {{ int num; }};
class Order {{ public: int num; }};
Make public.
C++
WHERE email = '91'
WHERE email = 91
Don't quote integer.
SQL
match index {{ 1 => {{}} }}
match index {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
let s = String::from("data"); let r=&s; s.push_str("!");
let mut s = String::from("data"); let r=&s; println!("{{}}", r); s.push_str("!");
Cannot mutate while borrowed.
Rust
const bar;
const bar = 23;
Initialize const.
JavaScript
let b: Int = 'data'
let b: String = 'data'
Fix type.
Swift
raise 'world'
raise Exception('world')
Raise needs an exception class.
Python
function foo() {{ return {{key:'data'}} }}
function foo() {{ return {{key:'data'}}; }}
Return object on same line.
JavaScript
function test(): void {{ return 95; }}
function test(): number {{ return 95; }}
Return type mismatch.
TypeScript
<p>data <b>world</p></b>
<p>data <b>world</b></p>
Nest properly.
HTML
String count = 'value';
String count = "value";
Double quotes.
Java
else print('value')
else: print('value')
Colon after else.
Python
.User {{ color: red; }}
.User {{ color: red; }}
Correct.
CSS
#main {{ color: #333; }}
#main {{ color: #333; }}
Correct.
CSS
switch(item){{ case 51: break; }}
switch(item){{ case 51: break; default: break; }}
Add default case.
Java
[39, 74, 89
[39, 74, 89]
Close bracket.
Python
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
System.out.println('result')
System.out.println('result');
Add semicolon.
Java
void foo(); int main(){{foo();}}
void foo(); // prototype int main(){{foo();}}
Declare before use.
C++
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
{{'id':'value'}}
{{"id":"value"}}
Use double quotes.
JSON
function foo() {{ echo 'hello'; }}
function foo() {{ echo 'hello'; }}
Correct.
PHP
with open('input.csv') as fh: data = fh.read()
with open('input.csv') as fh: data = fh.read()
Correct.
Python
INSERT INTO items VALUES ('test',44)
INSERT INTO items (id, status) VALUES ('test',44);
Specify columns.
SQL
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
if [ $item = 45 ]; then
if [ "$item" = 45 ]; then
Quote variable.
Shell
if (index = 75) {{}}
if (index == 75) {{}}
Use ==.
Java
<?php // code ?>
<?php // code ?>
Correct.
PHP
def process(num): return num + 1
def process(num): return num + 1
Correct.
Python
data[36]
if data.indices.contains(36) {{ data[36] }}
Check index.
Swift
<person age=91>
<person age="91">
Quote attribute.
XML
function handle(data) print(data) end
function handle(data) print(data) end
Correct.
Lua
class Order {{ int item; }} obj.item=5;
class Order {{ public int item; }} obj.item=5;
Make field public.
Java
// comment
/* comment */
Use /* */.
CSS
if (temp = 34) {}
if (temp == 34) {}
Use ==.
Dart
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('world')); app.listen(70);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('world')); app.listen(70, () => console.log('listening'));
Add callback.
Node.js
["test", 71]
["test", 71]
Correct.
JSON
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
let bar = 'world'
let bar = "world"
Double quotes.
Swift
UPDATE products SET email='world' WHERE status=45
UPDATE products SET email='world' WHERE status=45;
Add semicolon.
SQL
if index = 25
if index == 25
Use ==.
Go
name: data age: 60
name: data age: 60
Correct.
YAML
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
End of preview. Expand in Data Studio

Code-Syntax-Expanded

A massive, high-quality synthetic dataset for training LLMs to identify and correct syntax errors across 33 programming languages. Contains 5+ million unique examples (~1.1 GB) with English explanations – no artificial padding, no duplicate rows.

📊 Dataset Overview

Property Value
Total rows 5,000,000+
File size ~1.1 GB (uncompressed CSV)
Languages 33
Unique templates 160+ error patterns
Format CSV (4 columns)
License ODA-TL v1.0

📁 Dataset Structure

Each row contains:

Column Description
wrong_code Code snippet containing a syntax error
correct_code Corrected version of the snippet
explanation Concise English explanation of the error and fix
language Programming language (e.g., Python, JavaScript, Rust)

🧠 Languages Covered

General Purpose

Python, JavaScript, TypeScript, Java, C#, C++, Rust, Go, Ruby, PHP, Perl, Swift, Kotlin, R, MATLAB, Scala, Lua, Dart

Web Technologies

HTML, CSS

Database

SQL (MySQL/PostgreSQL-style)

Shell & Scripting

Bash, PowerShell

Markup & Configuration

YAML, JSON, XML, Markdown

Backend & Frameworks

Node.js (Express, fs, JWT, bcrypt, Mongoose)

📈 Dataset Statistics

Language Examples (approximate) Key Error Types
Python 350,000+ Missing colons, indentation, == vs =, imports
JavaScript 300,000+ Missing parentheses, === vs ==, const reassignment
Rust 200,000+ Borrow checker, moves, mutable references
Java 250,000+ Semicolons, type mismatches, array bounds
SQL 200,000+ Missing commas, WHERE typos, quoting
HTML/CSS 250,000+ Nesting, self-closing tags, attribute quoting
Others 3,200,000+ Language-specific syntax rules

🎯 Use Cases

  • Fine-tuning LLMs for code correction and syntax repair
  • Building code review assistants that detect common mistakes
  • Teaching programming with a massive bank of error/fix examples
  • Benchmarking model understanding of language-specific syntax
  • Creating educational tools for learning programming languages

💡 Example Entries

wrong_code correct_code explanation language
if x > 5\n print('hello') if x > 5:\n print('hello') Colon missing after if. Python
console.log('world' console.log('world') Close parenthesis. JavaScript
let mut x=5; let r1=&mut x; let r2=&mut x; let mut x=5; { let r1=&mut x; } let r2=&mut x; Only one mutable borrow allowed. Rust
SELECT name age FROM users; SELECT name, age FROM users; Missing comma between columns. SQL
<p>Hello <b>world!</p></b> <p>Hello <b>world!</b></p> Improper nesting of tags. HTML
Downloads last month
30
Number of rows:
13,370,000
Total file size:
1.07 GB