"""
Calculator operations in Python
"""
from datetime import datetime
from typing import List, Dict, Any
import math
class CalculationResult:
def __init__(self, result: float, operation: str, operands: List[float]):
self.result = result
self.operation = operation
self.operands = operands
self.timestamp = datetime.now()
def to_dict(self) -> Dict[str, Any]:
return {
'result': self.result,
'operation': self.operation,
'operands': self.operands,
'timestamp': self.timestamp.isoformat(),
}
class Calculator:
def __init__(self):
self.history: List[CalculationResult] = []
def add(self, a: float, b: float) -> float:
result = a + b
self._record_operation('add', [a, b], result)
return result
def subtract(self, a: float, b: float) -> float:
result = a - b
self._record_operation('subtract', [a, b], result)
return result
def multiply(self, a: float, b: float) -> float:
result = a * b
self._record_operation('multiply', [a, b], result)
return result
def divide(self, a: float, b: float) -> float:
if b == 0:
raise ValueError('Division by zero')
result = a / b
self._record_operation('divide', [a, b], result)
return result
def power(self, base: float, exponent: float) -> float:
result = math.pow(base, exponent)
self._record_operation('power', [base, exponent], result)
return result
def sqrt(self, x: float) -> float:
if x < 0:
raise ValueError('Cannot take square root of negative number')
result = math.sqrt(x)
self._record_operation('sqrt', [x], result)
return result
def get_history(self) -> List[Dict[str, Any]]:
return [calc.to_dict() for calc in self.history]
def clear_history(self) -> None:
self.history.clear()
def _record_operation(self, operation: str, operands: List[float], result: float) -> None:
calc_result = CalculationResult(result, operation, operands)
self.history.append(calc_result)
def create_calculator() -> Calculator:
return Calculator()
if __name__ == '__main__':
calc = create_calculator()
print(f"2 + 3 = {calc.add(2, 3)}")
print(f"10 / 2 = {calc.divide(10, 2)}")
print(f"History: {calc.get_history()}")
