Python和ReportLab:PDF表格中的列宽和对齐错误

Question

我使用Python 2.7(iOS Pythonista App)和reportlab 2.7模块来创建带有表格的PDF.一切正常.RepotLab自动格式化列的宽度.但是在两种情况下,我无法理解为什么reportlab以它的方式格式化输出以及如何获得我想要的格式.

案例1:几乎我想要的一切......

+-----+----------+---------------+----------+---------------------------------------------------------------------------------------------------------------+
| Day | Date     | Time          | Duration | Notes                                                                                                         |
+-----+----------+---------------+----------+---------------------------------------------------------------------------------------------------------------+
| Tue | 01.04.14 | 14:00 - 17:15 | 3.25     | Here are some notes.                                                                                          |
+-----+----------+---------------+----------+---------------------------------------------------------------------------------------------------------------+
| Wed | 02.04.14 | 18:00 - 20:15 | 2.25     | Sometime these notes are a little longer text so there must be a line break to let the whole note be visible! |
+-----+----------+---------------+----------+---------------------------------------------------------------------------------------------------------------+
| Thu | 02.04.14 | 14:00 - 17:15 | 3.25     | And sometimes these notes are only a few words.                                                               |
+-----+----------+---------------+----------+---------------------------------------------------------------------------------------------------------------+

案例2:我尝试排列浮点数

在...的帮助下

TableStyle([('ALIGN', (3,1), (3,-1), 'DECIMAL'),])

我试图将每个浮点精确地放在一条垂直线上.它可以工作,但是在"持续时间"列中,所有内容都是如此(硬)对齐,右侧是"注释"列中数字的一部分(并且"持续时间"值左侧有很多空格).似乎正确的填充设置为点之前的点或数字,而不是整个值.

+-----+----------+---------------+-----------+-------------------------------------------------+
| Day | Date     | Time          | Duration  | Notes                                           |
+-----+----------+---------------+-----------+-------------------------------------------------+
| Tue | 01.04.14 | 14:00 - 17:15 |        3.2|5Here are some notes.                            |
+-----+----------+---------------+-----------+-------------------------------------------------+
| Wed | 02.04.14 | 14:00 - 17:15 |        3.2|5And sometimes these notes are only a few words. |
+-----+----------+---------------+-----------+-------------------------------------------------+

在...的帮助下

TableStyle([('RIGHTPADDING', (3,1), (3,-1), 18),])

我得到了更好的结果,但我认为应该有更好的方法!？

案例3:尝试包装备注文本.

当我使用段落插入注释文本时,我得到包装文本,但列宽是惊人的.我无法完全按照实际输出得到以下示例.

整个桌子宽度适合文件(没有边距的DIN A4).但似乎每列都有相同的宽度.因此,日期,日期,时间和持续时间列比它们需要的范围要宽得多,并且Notes列比它需要的要窄得多.这两件事我不能按照我的意愿出现在下面的示例表中,但我相信你的想象力;-).

+-----+----------+---------------+----------+----------------------+
| Day | Date     | Time          | Duration | Notes                |
+-----+----------+---------------+----------+----------------------+
| Tue | 01.04.14 | 14:00 - 17:15 | 3.25     | Here are some notes. |
+-----+----------+---------------+----------+----------------------+
| Wed | 02.04.14 | 18:00 - 20:15 | 2.25     | Sometime these       |
|     |          |               |          | notes are a          |
|     |          |               |          | little longer        |
|     |          |               |          | text so there        |
|     |          |               |          | must be a line       |
|     |          |               |          | break to let         |
|     |          |               |          | the whole note       |
|     |          |               |          | be visible!          |
+-----+----------+---------------+----------+----------------------+
| Thu | 02.04.14 | 14:00 - 17:15 | 3.25     | And sometimes        |
|     |          |               |          | these notes are      |
|     |          |               |          | only a few words.    |
+-----+----------+---------------+----------+----------------------+

这是我使用的代码:

import pipista
from reportlab.lib.styles import getSampleStyleSheet
from reportlab.lib.pagesizes import A4
from reportlab.lib import colors
from reportlab.platypus import SimpleDocTemplate, Paragraph, Table, TableStyle

styleSheet = getSampleStyleSheet()

def makeReportData(n):
  monthreport = []
  monthreport += ('Day', '', 'Time', 'Duration', 'Notes'),
  monthreport += ('Tue', '01.04.14', '14:00 - 17:15', '3.25', n[0]),
  monthreport += ('Wed', '02.04.14', '14:00 - 17:15', '3.25', n[1]),
  monthreport += ('Thu', '03.04.14', '14:00 - 17:15', '3.25', n[2]),
  return monthreport

notes = ['Here are some notes.',
         'Sometime these notes are a little longer text so there must be a line break to let the whole note be visible!',
         'And sometimes these notes are only a few words.']

paranote = []
for note in notes:
  paranote += (Paragraph(note, styleSheet["BodyText"]),)

tstyle = [('INNERGRID', (0,0), (-1,-1), 0.25, colors.black),
          ('BOX', (0,0), (-1,-1), 0.25, colors.black),]

case1 = []
t = Table(makeReportData(notes))
t.setStyle(TableStyle(tstyle))
case1.append(t)
doc = SimpleDocTemplate('Table normal.pdf', pagesize = A4)
doc.build(case1)

case2 = []
tstyledez = tstyle + [('ALIGN', (3,1), (3,-1), 'DECIMAL'),]
t.setStyle(TableStyle(tstyledez))
case2.append(t)
doc = SimpleDocTemplate('Table align decimal.pdf', pagesize = A4)
doc.build(case2)

case3 = []
t = Table(makeReportData(paranote))
tstylepara = tstyle + [('VALIGN',(0,1),(3,-1),'TOP'),]
t.setStyle(TableStyle(tstylepara))
case3.append(t)
doc = SimpleDocTemplate('Table Paragraph.pdf', pagesize = A4)
doc.build(case3)

我希望有人能把我推向正确的方向.

Answer 1

好的,RTM总是个好主意!从ReportLab文档:

如果单元格值是Flowable或Flowable列表,则这些值必须具有确定的宽度,或者包含列必须具有固定宽度.

解:

from reportlab.lib.units import mm

t = Table(makeReportData(paranote), colWidths=(None, None, None, None, 100*mm))

我想也许DECIMAL对齐(案例2)的问题可能以同样的方式解决,但这不起作用.