生成一个分数类

好的，以下是一个简单的分数类的示例代码：

class Fraction:
    def __init__(self, numerator, denominator):
        self.numerator = numerator
        self.denominator = denominator
    
    def __str__(self):
        return f"{self.numerator}/{self.denominator}"
    
    def simplify(self):
        gcd = self.get_gcd(self.numerator, self.denominator)
        self.numerator //= gcd
        self.denominator //= gcd
        
    def get_gcd(self, a, b):
        if b == 0:
            return a
        else:
            return self.get_gcd(b, a % b)
        
    def add(self, other):
        new_numerator = self.numerator * other.denominator + other.numerator * self.denominator
        new_denominator = self.denominator * other.denominator
        result = Fraction(new_numerator, new_denominator)
        result.simplify()
        return result
    
    def subtract(self, other):
        new_numerator = self.numerator * other.denominator - other.numerator * self.denominator
        new_denominator = self.denominator * other.denominator
        result = Fraction(new_numerator, new_denominator)
        result.simplify()
        return result
    
    def multiply(self, other):
        new_numerator = self.numerator * other.numerator
        new_denominator = self.denominator * other.denominator
        result = Fraction(new_numerator, new_denominator)
        result.simplify()
        return result
    
    def divide(self, other):
        new_numerator = self.numerator * other.denominator
        new_denominator = self.denominator * other.numerator
        result = Fraction(new_numerator, new_denominator)
        result.simplify()
        return result

这个分数类包含四种基本运算（加、减、乘、除）以及一个化简分数的方法。你可以通过以下代码进行测试：

f1 = Fraction(3, 6)
f2 = Fraction(2, 4)
print(f1.add(f2))       # 输出 1/1
print(f1.subtract(f2))  # 输出 0/1
print(f1.multiply(f2))  # 输出 1/4
print(f1.divide(f2))    # 输出 1/1