[reportlab-users] error in tables.py (rl 1.21.2)

William Dode wilk at flibuste.net
Mon Jul 14 07:03:52 EDT 2008

On 14-07-2008, Robin Becker wrote:

> William Dode wrote:

>> Hi,


>> I've a random error on a table, i mean that it depends of the datas and

>> so it's difficult to reproduce...


>> It raise :


>> eportlab.platypus.tables:1103 in _getFirstPossibleSplitRowPosition

>> << for rh in self._rowHeights:

>> if h+rh>availHeight:

>> break

>> if not impossible.has_key(n):>> if h+rh>availHeight:


>> TypeError: unsupported operand type(s) for +: 'int' and 'NoneType'


>> in fact rh is None and self._rowHeights = [None, None, None]


>> I could resolve the problem by adding rh = rh or 0 but i don't know

>> why...


>> Any idea if i do something wrong or if it's a know bug ?


>> thx



> I'm not certain; we certainly have tests which have one or more rowheights set

> as None. Have you got a simple example?

It's difficult because it only append somes times on the middle of
a long report...
But i catch it !

You'll see that i use LongTable even if they are not long, because i use
a generic library.

from reportlab.platypus import BaseDocTemplate, Frame, Paragraph, NextPageTemplate, PageBreak, PageTemplate, Spacer, KeepTogether, Flowable
from reportlab.lib.pagesizes import A4, landscape, portrait, cm
from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle
from reportlab.lib.enums import TA_LEFT, TA_CENTER
from reportlab.lib import colors
from reportlab.platypus.tables import TableStyle, LongTable, Table
frame = Frame(2 * cm, 2 * cm , A4[0] - 4 * cm, A4[1] - 6*cm)
doc = BaseDocTemplate(f, pagesize=A4)
style_para = getSampleStyleSheet()['Normal']
style_para.spaceAfter = 12

elements = []
for z in (3,6,3,5,12,7,3,4,6,3,8):
elements.append( Paragraph('toto',style_para))
elements.append(LongTable([('x') for x in range(z)], repeatRows=1))


William Dodé - http://flibuste.net
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