price | Python Fiddle

class price_validation:
    STATE=[]
    
    def __init__(self, net_amount, max_price, min_price):
        self.net_amount=net_amount
        self.max_price=max_price
        self.min_price=min_price
       
        
    def max_price_to_net_amount(self):
        'validating if max_price is greater than or equal to net_amount'
        if self.max_price is not None and self.max_price >= self.net_amount:
            price_validation.STATE=True
            return price_validation.STATE
        else:
            data_validation.STATE=False
            return price_validation.STATE
            
            
    def max_price_to_min_price(self):
        'validating if max_price is greater than or equal to min_price'
        if self.max_price is not None and self.max_price >= self.min_price:
            price_validation.STATE=True
            return price_validation.STATE
        else:
            price_validation.STATE=False
            return price_validation.STATE
    
    
    def min_price_to_net_amount(self):
        'validating if min_price is lesser than or equal to net_amount'
        if self.min_price is not None and self.min_price <= self.net_amount:
            price_validation.STATE=True
            return price_validation.STATE
        else:
            price_validation.STATE=False
            return price_validation.STATE
        
firstcontract=price_validation(3000, 4000, 2000)
firstcontract.max_price_to_net_amount()

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