[Python知识库]【python学习笔记】每日一练2.1

class LittlePractice():

    def fibonacci(self,fib: int) -> list:
        """Fibonacci series:the sum of two elements defines the next

        :return:Fibonacci list
        """
        a, b = 0, 1
        fib_list = []
        while a < fib:
            fib_list.append(a)
            a, b = b, a + b
        return fib_list

    def learn_match(self):
        pass
#         python 3.10 new !!

    def un_packing_list(self,list1:list):
        """*-operator to unpack the arguments out of a list or tuple
        """
        return list(range(*list1))

    def un_packing_dict(self,name,age,tele):
        """dictionaries can deliver keyword arguments with the **-operator
        """
        return 'My name is ' + name + '.I am ' + str(age) + ' years old.My telephone number is ' + tele + '.'

    def learn_lambda1(self,n):
        """lambda functions can reference variables from the containing scope
        """
        return lambda x:x+n

    def learn_lambda2(self):
        """pass a small function as an argument
        """
        pairs = [(1, 'one'), (2, 'two'), (3, 'three'), (4, 'four')]
        pairs.sort(key=lambda pair: pair[1])
        print(pairs)


practice = LittlePractice()
print(practice.fibonacci(fib=10))

print(practice.un_packing_list(list1 = [1,5]))
d = {'name':'Tom','age':15,'tele':'110'}
print(practice.un_packing_dict(**d))

f = practice.learn_lambda1(50)
print(f(100))
practice.learn_lambda2()