python之将值附加到列表并添加到字典

我的 binary_list 是“000”、“001”、“010”、……的字符串列表。

我正在尝试将每个位串中 1 的数量添加到字典中。 将为字符串中出现的每个 1 的数量创建大小为 n 的字典

我似乎无法将位串附加到列表中，然后将其添加到字典中。当我运行代码时，我得到:

input: sortbits(3) 
 
000 
001 
010 
011 
100 
101 
110 
111 
{0: [], 1: [], 2: []} 

正确的输出是:

000 
001 
010 
011 
100 
101 
110 
111 
{0: [000], 1: [001, 010, 100], 2: [011,101, 110], 3: [111]} 

我的代码:

def sortbit(n): 
    max_num = 2**n 
    binary_list = [] 
    for x in range(0,max_num): 
        stringy = [] 
        for a in range(n): 
            stringy.append(str(x%2)) 
            x //= 2 
        print ''.join(reversed(stringy)) 
 
        stringy_list = ''.join(reversed(stringy)) 
        binary_list.append(stringy_list) 
 
    count_dict = dict.fromkeys(range(0,n+1)) 
 
    for element in binary_list: 
        count = 0 
        value_list = [] 
        for character in element: 
            if character == '1': 
                count += 1 
        for y in count_dict: 
            if y == str(count): 
                value_list.append(element) 
            count_dict[y] = value_list  
 
    print count_dict 

请您参考如下方法:

>>>strings=["000","001","010","011","100","101","110","111"] 
>>>d={} 
>>>for s in strings: 
...     count = s.count("1") 
...     if count not in d: 
...             d[count]=[] 
...     d[count].append(s) 
 
>>>d 
{0: ['000'], 1: ['001', '010', '100'], 2: ['011', '101', '110'], 3: ['111']}