mirror of
https://github.com/open-thought/reasoning-gym.git
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152 lines
5 KiB
Python
152 lines
5 KiB
Python
import random
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import string
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from dataclasses import dataclass
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from typing import Optional, Tuple
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import sympy
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from sympy import Eq, Symbol, solve
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from ..dataset import ProceduralDataset
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@dataclass
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class SimpleEquationsConfig:
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"""Configuration for simple equation task generation"""
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min_terms: int = 2 # Minimum number of terms in expression
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max_terms: int = 4 # Maximum number of terms
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min_value: int = 1 # Minimum value for constants
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max_value: int = 100 # Maximum value for constants
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operators: tuple = ("+", "-", "*") # Allowed operators
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seed: Optional[int] = None
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size: int = 500
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def validate(self):
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"""Validate configuration parameters"""
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assert self.min_terms > 0, "min_terms must be positive"
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assert self.max_terms >= self.min_terms, "max_terms must be >= min_terms"
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assert self.min_value > 0, "min_value must be positive"
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assert self.max_value >= self.min_value, "max_value must be >= min_value"
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assert len(self.operators) > 0, "must specify at least one operator"
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class SimpleEquationsDataset(ProceduralDataset):
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"""Generates simple equations with one variable to solve"""
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def __init__(self, config: SimpleEquationsConfig):
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self.config = config
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self.config.validate()
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self._prompt_templates = [
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"Find the value of {variable} in the equation: {equation}",
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"Solve for {variable}: {equation}",
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"Determine the value of {variable} that satisfies: {equation}",
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]
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super().__init__(seed=config.seed, size=config.size)
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def __getitem__(self, idx: int) -> dict:
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"""Generate a single equation task
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Returns:
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dict with keys:
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- question: str, the equation to solve (e.g. "3 * x = 12")
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- answer: str, the solution value (e.g. "4")
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- metadata: dict with generation parameters
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"""
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rng = random.Random(self.seed + idx)
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# Get variable and generate equation
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variable = self._get_variable(rng)
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equation, solution = self._generate_equation(rng, variable)
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return {
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"question": rng.choice(self._prompt_templates).format(variable=variable, equation=equation),
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"answer": str(solution),
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"metadata": {
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"equation": equation,
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"variable": variable,
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},
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}
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def _get_variable(self, rng: random.Random) -> str:
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"""Get a random lowercase variable name"""
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return rng.choice(string.ascii_lowercase)
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def _generate_equation(self, rng: random.Random, variable: str) -> Tuple[str, int]:
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"""Generate an equation and its solution
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Args:
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rng: Random number generator
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variable: Variable symbol to use in equation
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Returns:
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Tuple of (equation string, solution integer)
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"""
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x = Symbol(variable)
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# Generate terms for left side
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num_terms = rng.randint(self.config.min_terms, self.config.max_terms)
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terms = []
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# Generate all constant terms first
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for _ in range(num_terms):
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value = rng.randint(self.config.min_value, self.config.max_value)
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terms.append(value)
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# Replace one random term with the variable term
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var_pos = rng.randint(0, num_terms - 1)
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coef = rng.randint(self.config.min_value, self.config.max_value)
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terms[var_pos] = coef * x
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# Apply operators between terms
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expr = terms[0]
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for i in range(1, num_terms):
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op = rng.choice(self.config.operators)
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if op == "+":
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expr = expr + terms[i]
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elif op == "-":
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expr = expr - terms[i]
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else: # '*'
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expr = expr * terms[i]
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left_side = expr
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# Generate right side
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right_side = rng.randint(self.config.min_value, self.config.max_value)
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# Create equation
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equation = Eq(left_side, right_side)
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solutions = solve(equation, x)
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# Check if we found any solutions
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if not solutions:
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return self._generate_equation(rng, variable)
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solution = solutions[0]
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# Only return if solution is a positive integer
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if not (isinstance(solution, sympy.Integer) and solution > 0):
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return self._generate_equation(rng, variable)
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return f"{left_side} = {right_side}", int(solution)
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def simple_equations_dataset(
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min_terms: int = 2,
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max_terms: int = 5,
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min_value: int = 1,
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max_value: int = 100,
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operators: tuple = ("+", "-", "*"),
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seed: Optional[int] = None,
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size: int = 500,
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) -> SimpleEquationsDataset:
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"""Create a SimpleEquationsDataset with the given configuration"""
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config = SimpleEquationsConfig(
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min_terms=min_terms,
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max_terms=max_terms,
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min_value=min_value,
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max_value=max_value,
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operators=operators,
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seed=seed,
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size=size,
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)
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return SimpleEquationsDataset(config)
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