# 找到字符串的位置分布

def find_str_position(m_str, c_str):
    mlen = len(m_str)
    clen = len(c_str)
    position_list = []

    for i in range(mlen):
        if i+clen <= mlen:
            tmp_str = ''
            for j in range(clen):
                tmp_str += m_str[i+j]

            if tmp_str == c_str:
                position_list.append(i)

    return position_list

print(find_str_position('aabbcc', 'bb'))