质数的多种实现方法

#函数实现
def fib(num):
    n,a,b=0,0,1
    while n<num:
        print(b)
        a,b=b,a+b
        n+=1

#列表添加
def fib(num):
    n,a,b=0,0,1
    l=[]
    while n<num:
        l.append(b)
        a,b=b,a+b
        n+=1
    return l

#类，迭代器实现

class Fib:
    def __init__(self,num):
        self.num=0
        self.n=0
        self.a,self.b=0,1
    def __iter__(self):
        return self
    def __next__(self):
        if self.n<self.num:
            result=self.b
            self.a,self.b=self.b,self.a+self.b
            self.n+=1
            return result
        else:
            raise StopIteration

斐波拉契yield生成器实现

def fib(num):
    n,a,b=0,0,1
    while n<num:
        yield b
        a,b=b,a+b
        n+=1
for i in fib(10):
    print(i)