(self)
return len(f) == 1 and S.Zero in f
>>> from sympy.core.exprtools import Factors
        >>> Factors(0).is_zero
        True
>>> from sympy.core.exprtools import Factors
        >>> Factors(0).is_zero
        True
>>> from sympy . core . exprtools import Factors >>> Factors ( 0 ) . is_zero True
def is_zero(self):  # Factors
        """
        >>> from sympy.core.exprtools import Factors
        >>> Factors(0).is_zero
        True
        """
        f = self.factors
        return len(f) == 1 and S.Zero in f
def is_zero ( self ) : # Factors f = self . factors return len ( f ) == 1 and S . Zero in f