开始攻克下一本电子书PDF--Dive Into Python by Mark Pilgrim

Dive Into Python by Mark Pilgrim

http://woodpecker.org.cn/diveintopython3/

《Dive into Python 3》为 Mark Pilgrim 针对所著原书《Dive into Python》面向 Python 3 进行的更新，与原书相比，“它 20% 的内容进行了修订，80％ 的内容是全新的”。在啄木鸟社区的努力下，该书最终有了中文版本。

同时推荐如下链接--

9 本免费的 Python 语言编程书籍

http://linuxtoy.org/archives/9-free-python-books.html

COPY自己测试的第一个SAMPLE：

SUFFIXES = {1000:['KB','MB','GB','TB','PB','EB','ZB','YB'],
            1024:['KiB','MiB','GiB','TiB','PiB','EiB','ZiB','YiB']}

def approximate_size(size,a_kilobyte_is_1024_bytes=True):
    '''Convert a file size to human-readeable form.
    Keyword arguments:
    size -- file size in bytes
    a_kilobyte_is_1024_bytes --if True(default),use multiples of 1024
                               if False,use multiples of 1000
    Returns:string
    '''

    if size < 0:
        raise ValueError('number must be non-negative')
    multiple = 1024 if a_kilobyte_is_1024_bytes else 1000

    for suffix in SUFFIXES[multiple]:
        size /= multiple
        if size < multiple:
            return '{0:.1f} {1}'.format(size,suffix)

    raise ValueError('number too large')

if __name__ == '__main__':
    print(approximate_size(100,False))
    print(approximate_size(100))