#習題2：定義一個類：實現功能可以返回隨機的10個數字，隨機的10個字母，
#隨機的10個字母和數字的組合；字母和數字的範圍可以指定

class RandomString():
        
    #隨機數選擇的範圍作為引數，如（1~100）字母 （'A'~'z'）,大寫字母在前 按ascii值排列先後
    def __init__(self,start_num=0,end_num=100,start_alpha='A',end_alpha='z'):
        import string
        if not isinstance(start_num,int) or not isinstance(end_num,int) or
 
 \
        not isinstance(start_alpha,str) or not isinstance(end_alpha,str) or \
        (start_alpha not in string.ascii_letters or end_alpha not in string.ascii_letters):
            print('引數型別錯誤，請重新輸入！')
            return None
        self.start_num=start_num
        self.end_num=end_num
        self.start_alpha
 
=start_alpha
        self.end_alpha=end_alpha

    #生成要求數量隨機數字,num 隨機數的數量
    def random_digits(self,num):
        print('self.start_num,self.end_num:',self.start_num,self.end_num)
        if not isinstance(num,int):
            print('數字型別輸入錯誤，請重新輸入')
            return None
        from random import
 
 randint
        num_list=[]
        for i in range(num):
            num_list.append(randint(self.start_num,self.end_num))
        return num_list

    #生成要求數量隨機字母，大小寫混合
    def random_letters(self,num):
        if not isinstance(num,int):
            print('數字型別輸入錯誤，請重新輸入')
            return None
        from random import randint
        import string
        all_letters=string.ascii_uppercase+string.ascii_lowercase
        start_position=all_letters.find(self.start_alpha)
        end_position=all_letters.find(self.end_alpha)
        if start_position>end_position:
            start_position,end_position=end_position,start_position

        letters_list=[]
        for i in range(num):
            letters_list.append(string.ascii_letters[randint(start_position,end_position)])
        return letters_list

    def random_digits_letters(self,num):
        digits_string=list(range(self.start_num,self.end_num+1))
        print('digits_string',digits_string)
        import string
        all_letters=string.ascii_uppercase+string.ascii_lowercase
        print('all_letters',all_letters)
        print('self.start_alpha',self.start_alpha)
        print('self.end_alpha',self.end_alpha)
        start_position=all_letters.find(self.start_alpha)
        end_position=all_letters.find(self.end_alpha)
        letters_string=list(all_letters[start_position:end_position+1])
        print('letters_string',letters_string)
        
        from random import choice
        all_string=digits_string+letters_string
        print('all_string',all_string)
        all_list=[]
        for i in range(num):
            
            all_list.append(choice(all_string))
        return all_list


randomdigitalpha=RandomString(2,100,'W','e') #
print(randomdigitalpha.start_num)
print(randomdigitalpha.random_digits(10))

print(randomdigitalpha.random_letters(5))

print(randomdigitalpha.random_digits_letters(15))