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buildEmotionModel.ipynb

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  • expression.py 1000 B
    """
    Expression module defines the structure of an expression.
    """
    from typing import Union
    from calculator.operators import Operator
    
    Term: type = float
    Token: type = Union[Operator, Term]
    
    
    class OperatorExpression:
        """
        OperatorExpression class is an expression that contains an operator and two sub-expressions.
        """
        def __init__(self, operator: Operator, left, right):
            self.operator = operator
            self.left = left
            self.right = right
    
        def __repr__(self):
            return f"({self.left} {self.operator} {self.right})"
    
        def __call__(self) -> Term:
            return self.operator(self.left(), self.right())
    
    
    class TermExpression:
        """
        TermExpression class is an expression that contains a single term.
        """
        def __init__(self, value: Term):
            self.value = value
    
        def __repr__(self):
            return str(self.value)
    
        def __call__(self) -> Term:
            return self.value
    
    
    Expression: type = Union[OperatorExpression, TermExpression]