Question

我正在使用reportlab 3.2.0。

SPACER = Spacer(0, 10)
buff = BytesIO()
doc = SimpleDocTemplate(buff, rightMargin=0.2 * inch,
                        leftMargin=0.2 * inch,\
                        topMargin=100, bottomMargin=68)
elements = []
# here add elements
elements.append(SPACER)
# here add more elements
doc.build(elements)

每当空间最终靠近页面底部时，我都会收到此错误：

File "/venv/lib/python2.7/site-packages/reportlab/platypus/doctemplate.py", line 1171, in build
    BaseDocTemplate.build(self,flowables, canvasmaker=canvasmaker)
  File "/venv/lib/python2.7/site-packages/reportlab/platypus/doctemplate.py", line 927, in build
    self.handle_flowable(flowables)
  File "/venv/lib/python2.7/site-packages/reportlab/platypus/doctemplate.py", line 829, in handle_flowable
    raise LayoutError(ident)
LayoutError: Flowable <Spacer at 0x4c87d40 frame=normal>...(0 x 10) too large on page 2 in frame 'normal'(554.475590551 x 661.88976378) of template 'Later'

有没有办法阻止它抛出异常（即忽略空格元素）？

Answer 1

这是Spacer的一个快速实现，它使用了你指定给它的较小高度或者当前页面上留下的空间。

class ConditionalSpacer(Spacer):

    def wrap(self, availWidth, availHeight):
        height = min(self.height, availHeight-1e-8)
        return (availWidth, height)

你可以像Spacer一样使用它。

reportlab LayoutError：Flowable Spacer太大了

1 个答案: