_tifffile.py 文件源码

def stack_pages(pages, memmap=False, *args, **kwargs):
    """Read data from sequence of TiffPage and stack them vertically.

    If memmap is True, return an array stored in a binary file on disk.
    Additional parameters are passsed to the page asarray function.

    """
    if len(pages) == 0:
        raise ValueError("no pages")

    if len(pages) == 1:
        return pages[0].asarray(memmap=memmap, *args, **kwargs)

    result = pages[0].asarray(*args, **kwargs)
    shape = (len(pages),) + result.shape
    if memmap:
        with tempfile.NamedTemporaryFile() as fh:
            result = numpy.memmap(fh, dtype=result.dtype, shape=shape)
    else:
        result = numpy.empty(shape, dtype=result.dtype)

    for i, page in enumerate(pages):
        result[i] = page.asarray(*args, **kwargs)

    return result