bug with KeyError: None

[luguoyixiazi]

in Composer.insert(self, index, doc, remove_property_fields)
...
--> 213 img_part = doc.part.rels[rid].target_part
215 new_img_part = self.pkg.image_parts._get_by_sha1(img_part.sha1)
216 if new_img_part is None:

KeyError: None

this happened when I append a document that has some pic to Composer like this：
tp = Document(os.path.join(directory, file))
master.append(tp)

[KaHuier]

from docxcompose.image import ImageWrapper
from docxcompose.utils import NS
from docx.opc.constants import RELATIONSHIP_TYPE as RT
def add_shapes(self, doc, element):
    shapes = xpath(element, './/v:shape/v:imagedata')
    for shape in shapes:
        rid = shape.get('{%s}id' % NS['r'])
        if rid is None:  # 这里会有时候取不到 导致报错 重写
            continue
        img_part = doc.part.rels[rid].target_part

        new_img_part = self.pkg.image_parts._get_by_sha1(img_part.sha1)
        if new_img_part is None:
            image = ImageWrapper(img_part)
            new_img_part = self.pkg.image_parts._add_image_part(image)

        new_rid = self.doc.part.relate_to(new_img_part, RT.IMAGE)
        shape.set('{%s}id' % NS['r'], new_rid)
Composer.add_shapes = add_shapes 

Add this code to the front of your code.
You can fix it temporarily with this method.