我认为除了HelloWorld之外，Python的三大数据转换实例可以作为开始学习Python的入门语言。

Python的三大数据转换实例

一、反转三位数

class Solution:
        def funtcion(self,number):
            h=int(number/100)
            t=int(number%100/10)
            z=int(number%10)
            return 100*z+10*t+h
if __name__=='__main__':
    solution = Solution()
    num=123
    new_num = solution.funtcion(num)
    print("输入:{}".format(num))
    print("输出:{}".format(new_num))

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二、合并两个数列

class Solution:
    def function(self,A,B):
        i,j=0,0
        lists=[]
        while i < len(A) and j < len(B):
            if A[i]<B[j]:
                lists.append(A[i])
                i+=1
            else:
                lists.append(B[j])
                j+=1
        while i < len(A):
            lists.append(A[i])
            i+=1
        while j < len(B):
            lists.append(B[j])
            j+=1
        return lists
    def built(self,A,B):
        A.extend(B)
        A.sort()
        return A  
if __name__ == '__main__':
    A=[1,2,3,4]
    B=[2,4,6,8]
    solution = Solution()
    print("输入:{}{}".format(A,B))
    print("输出:{}".format(solution.function(A,B)))
    print("使用内置函数:{}".format(solution.built(A,B)))

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三、旋转字符串

class Solution:
    def function(self,S,offset):
        new_s=S
        if len(new_s) > 0:
            offset = offset % len(new_s)
        temp = (new_s+new_s)[len(new_s)-offset:2*len(new_s)-offset]
        for i in range(len(temp)):
            s[i]= temp[i]
        return new_s
if __name__ == '__main__':
    s=["a","b","c","d","e","f","g"]
    offset = 3
    solution = Solution()
    print("输入:s={},off={}".format(s, offset))
    print("输入:s={}".format(solution.function(s,offset)))

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