Reportlab：使用表格和合并单元格
示例：
#!/usr/bin/env python
# -*- coding: utf-8 -*-
from reportlab.platypus import SimpleDocTemplate, Table, TableStyle
from reportlab.lib.pagesizes import letter
def testPdf():
doc = SimpleDocTemplate("testpdf.pdf",pagesize=letter,
rightMargin=72,leftMargin=72,
topMargin=72,bottomMargin=18)
elements = []
datas = []
for x in range(1,50):
datas.append(
[x,x+1]
)
t=Table(datas)
tTableStyle=[
('SPAN',(0,0),(0,37)),
]
t.setStyle(TableStyle(tTableStyle))
elements.append(t)
doc.build(elements)
if __name__ == '__main__':
testPdf()
这段代码运行成功，因为表格在一页上。如果我把“SPAN”设置为“(0,0),(0,38)”，就会出现错误：
reportlab.platypus.doctemplate.LayoutError: Flowable with cell(0,0) containing
'1'(46.24 x 702) 在模板 'Later' 的框架 'normal'(456.0 x 690.0*) 的第 2 页上太大了
如果我把它设置得更大，错误会变成：
Traceback (most recent call last):
File "testpdf.py", line 26, in <module>
testPdf()
File "testpdf.py", line 23, in testPdf
doc.build(elements)
File "/usr/local/lib/python2.7/dist-packages/reportlab-2.5-py2.7-linux-x86_64.egg/reportlab/platypus/doctemplate.py", line 1117, in build
BaseDocTemplate.build(self,flowables, canvasmaker=canvasmaker)
File "/usr/local/lib/python2.7/dist-packages/reportlab-2.5-py2.7-linux-x86_64.egg/reportlab/platypus/doctemplate.py", line 880, in build
self.handle_flowable(flowables)
File "/usr/local/lib/python2.7/dist-packages/reportlab-2.5-py2.7-linux-x86_64.egg/reportlab/platypus/doctemplate.py", line 763, in handle_flowable
if frame.add(f, canv, trySplit=self.allowSplitting):
File "/usr/local/lib/python2.7/dist-packages/reportlab-2.5-py2.7-linux-x86_64.egg/reportlab/platypus/frames.py", line 159, in _add
w, h = flowable.wrap(aW, h)
File "/usr/local/lib/python2.7/dist-packages/reportlab-2.5-py2.7-linux-x86_64.egg/reportlab/platypus/tables.py", line 1113, in wrap
self._calc(availWidth, availHeight)
File "/usr/local/lib/python2.7/dist-packages/reportlab-2.5-py2.7-linux-x86_64.egg/reportlab/platypus/tables.py", line 587, in _calc
self._calc_height(availHeight,availWidth,W=W)
File "/usr/local/lib/python2.7/dist-packages/reportlab-2.5-py2.7-linux-x86_64.egg/reportlab/platypus/tables.py", line 553, in _calc_height
spanFixDim(H0,H,spanCons,lim=hmax)
File "/usr/local/lib/python2.7/dist-packages/reportlab-2.5-py2.7-linux-x86_64.egg/reportlab/platypus/tables.py", line 205, in spanFixDim
t = sum([V[x]+M.get(x,0) for x in xrange(x0,x1)])
TypeError: unsupported operand type(s) for +: 'NoneType' and 'int'
我该如何处理这个问题？
1 个回答
2
你遇到这个问题的原因正是Gordon Worley上面提到的。系统没有办法自动跨页显示，因为它计算的高度和宽度会让算法感到困惑。
解决这个问题的一种方法是手动为每一页格式化和设置你的表格，使用行和列的坐标。可惜的是，报告实验室里的回复也建议我们这样做。
我确实是手动把我的表格分开，并单独设置样式，在我看来这是一种很丑陋的方法。我会再找其他的解决方案。