这还不简单！！！

        return {
            'width': 28,
            'height': 10,
            'color': 16
        }

开个玩笑，开个玩笑

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Created by TaoYuan on 2017/12/14 0014.
# @Link    : http://blog.csdn.net/lftaoyuan
# Github   : https://github.com/seeways
# @Remark  : Python学习群：315857408
# 请编写一个bmpinfo.py，可以检查任意文件是否是位图文件，如果是，打印出图片大小和颜色数
import base64, struct

bmp_data = base64.b64decode(
    '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')


def bmp_info(data):
    img_info = struct.unpack_from('<ccIIIIIIHH', data[:30])  # (b'B', b'M', 616, 0, 54, 40, 28, 10, 1, 16)
    # 'BM'表示Windows位图，'BA'表示OS/2位图
    if img_info[0] == b'B' and img_info[1] == b'M' or b'A':
        return {
            'width': img_info[6],
            'height': img_info[7],
            'color': img_info[9]
        }
    else:
        return None


# 测试
bi = bmp_info(bmp_data)
assert bi['width'] == 28
assert bi['height'] == 10
assert bi['color'] == 16
print('ok')