为什么我在多个图片转换PDF时，只能保存于一次吗

Question

import os

import PIL
from reportlab.lib import utils
from reportlab.lib.utils import ImageReader
from reportlab.pdfgen import canvas

from image_split import ClipType
from reportlab.lib.pagesizes import A4, landscape, portrait
from PIL import Image
from reportlab.platypus import SimpleDocTemplate, Image, PageBreak
from reportlab.platypus import PageTemplate, Frame


# ----------------------------------------------------------------------

def create_pdf(filename, path, page, cliptype, imageformat):
    """
    """
    if cliptype == ClipType.ALL:
        imgDoc = canvas.Canvas(filename)  # pagesize=letter
        imgDoc.setPageSize(A4)
        document_width, document_height = A4
    for page in range(page):
        print 'create_pdf', page
        image_file = PIL.Image.open(os.path.join(path, '{0}.{1}.{2}'.format(page, '1', imageformat)))
        image_width, image_height = image_file.size
        if not (image_width > 0 and image_height > 0):
            raise Exception
        image_aspect = image_height / float(image_width)
        print_width = document_width
        print_height = document_width * image_aspect
        imgDoc.drawImage(ImageReader(image_file), document_width - print_width,
                         document_height - print_height, width=print_width,
                         height=print_height, preserveAspectRatio=True)
        # Story.append(Image(image_file, width, height))
        imgDoc.showPage()
        imgDoc.save()
    print "%s created" % filename


# ----------------------------------------------------------------------
if __name__ == "__main__":
    cliptype = ClipType.MARGIN_ONLY
    pdfsavepath = r".\tmp\pdf\484d8037a509648a8e09fc0466b06f38\tongjixuexifangfa{0}.pdf".format(cliptype)
    subimagepath = r".\tmp\pdf\484d8037a509648a8e09fc0466b06f38\subimage{0}".format(cliptype)
    create_pdf(pdfsavepath, subimagepath, 20, cliptype, 'jpg')

Answer 1

是的，要想写入多张照片，把第40行代码 imgDoc.save()移到for循坏外就可以了哦~