Python

import oss2

# 连接 oss 
auth = oss2.Auth(settings.OSS_ACCESS_KEY_ID, settings.OSS_ACCESS_KEY_SECRET)
bucket = oss2.Bucket(auth, settings.OSS_ENDPOINT, settings.OSS_BUCKET_NAME)


def CalculateFolderLength(bucket, folder):
    # 列举所有的文件或目录，但每次循环列举100个，可以通过 max_keys 来调整数目，最大值为 1000
    length = 0
    for obj in oss2.ObjectIterator(bucket, prefix=folder, max_keys=1000):
        length += obj.size
    return length


def get_size():
    # 计算所有文件总大小
    size = 0
    for obj in oss2.ObjectIterator(bucket, delimiter='/'):
        if obj.is_prefix():  # 文件夹
            length = CalculateFolderLength(bucket, obj.key)
            size += length
        else:
            size += obj.size
    return size


def StrOfSize(size):
    '''
    文件大小单位转换
    递归实现，精确为最大单位值 + 小数点后三位
    '''
    def strofsize(integer, remainder, level):
        if integer >= 1024:
            remainder = integer % 1024
            integer //= 1024
            level += 1
            return strofsize(integer, remainder, level)
        else:
            return integer, remainder, level

    units = ['B', 'KB', 'MB', 'GB', 'TB', 'PB']
    integer, remainder, level = strofsize(size, 0, 0)
    if level+1 > len(units):
        level = -1
    return ( '{}.{:>03d} {}'.format(integer, remainder, units[level]) )


print(StrOfSize(get_size()))
　　
 

参考文章(大小单位转换):  https://blog.csdn.net/wskzgz/article/details/99293181