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首页 > 解决方案 > 有人可以给我使用reportlab生成带有页眉（添加图像）、页脚（Y页X）和带有书签的目录的PDF报告吗？

python - 有人可以给我使用reportlab生成带有页眉（添加图像）、页脚（Y页X）和带有书签的目录的PDF报告吗？

问题描述

我可以生成带有页眉和页脚的 PDF，也可以生成带有目录的 PDF，但是我不能生成带有页眉（图像）、页脚（y 的 x 页）和带有书签的目录的 pdf，我已经花了好几天把这三个功能结合在一起，但是失败了，谁能给我一些建议？我的代码有什么问题，未显示 pdf 的目录，并说“目录 0 的占位符”

class MyDocTemplate(BaseDocTemplate):
    def __init__(self, filename, **kw):
        self.allowSplitting = 0
        BaseDocTemplate.__init__(self, filename, **kw)
        template = PageTemplate('normal', [Frame(2.5*cm, 2.5*cm, 15*cm, 25*cm)])
        self.addPageTemplates(template)

def afterFlowable(self, flowable):
    if isinstance(flowable, Paragraph):
        txt = flowable.getPlainText()
        style = flowable.style.name
        if style == 'Heading1':
            key = 'h1-%s' % self.seq.nextf('heading1')
            self.canv.bookmarkPage(key)
            self.notify('TOCEntry', (0, txt, self.page))
        elif style == 'Heading2':
            key = 'h2-%s' % self.seq.nextf('heading2')
            print (key)
            self.canv.bookmarkPage(key)
            self.notify('TOCEntry', (1, txt, self.page, key))

class NumberedCanvas(canvas.Canvas):
    def __init__(self, *args, **kwargs):
        canvas.Canvas.__init__(self, *args, **kwargs)
        self._saved_page_states = []

    def showPage(self):
        self._saved_page_states.append(dict(self.__dict__))
        self._startPage()

    def save(self):
        """add page info to each page (page x of y)"""
        num_pages = len(self._saved_page_states)
        for state in self._saved_page_states:
            self.__dict__.update(state)
            self.draw_page_number(num_pages)
            canvas.Canvas.showPage(self)
        canvas.Canvas.save(self)

    def draw_page_number(self, page_count):
        self.setFont('Times-Bold',14)
        self.drawRightString(7.6*inch,.5*inch,
        "Page %d of %d" % (self._pageNumber, page_count))

if __name__ == "__main__":

    h1 = PS(name = 'Heading1',
    fontSize = 14,
    leading = 16)
    h2 = PS(name = 'Heading2',
    fontSize = 12,
    leading = 14,
    leftIndent = 25)

    #Build story.
    story = []
    toc = TableOfContents()

    #For conciseness, using the same styles for headings and TOC entries
    toc.levelStyles = [h1, h2]
    story.append(toc)
    story.append(PageBreak())
    story.append(Paragraph('First heading', h1))
    story.append(Paragraph('Text in first heading', PS('body')))
    story.append(Paragraph('First sub heading', h2))
    story.append(Paragraph('Text in first sub heading', PS('body')))
    story.append(PageBreak())
    story.append(Paragraph('Second sub heading', h2))
    story.append(Paragraph('Text in second sub heading', PS('body')))
    story.append(Paragraph('Last heading', h1))
    doc = MyDocTemplate("mypdf.pdf")
    doc.multiBuild(story, canvasmaker=NumberedCanvas)

标签： pythonpdfreportlab

解决方案

检查您的代码缩进。该afterFlowable方法应在内部定义class MyDocTemplate：

class MyDocTemplate(BaseDocTemplate):
    def __init__(self, filename, **kw):
        self.allowSplitting = 0
        BaseDocTemplate.__init__(self, filename, **kw)
        template = PageTemplate('normal', [Frame(2.5*cm, 2.5*cm, 15*cm, 25*cm)])
        self.addPageTemplates(template)

    def afterFlowable(self, flowable):
        if isinstance(flowable, Paragraph):
            txt = flowable.getPlainText()
            style = flowable.style.name
            ...

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