(self)
return abs(min(self.balance, 0))
The customer is considered to have credits if their balance is below 0.
The customer is considered to have credits if their balance is below 0.
The customer is considered to have credits if their balance is below 0 .
def credits(self):
        """
        The customer is considered to have credits if their balance is below 0.
        """
        return abs(min(self.balance, 0))
def credits ( self ) : return abs ( min ( self . balance , 0 ) )