Python＆ReportLab：在PDF表中錯誤的列寬和對齊方式

Question

我使用Python 2.7（iOS Pythonista應用程序）和reportlab 2.7模塊來創建一個帶有表格的PDF。一切正常。 RepotLab自動格式化列的寬度。但在兩種情況下，我無法理解爲什麼reportlab以它的方式格式化輸出，以及如何獲得我想要的格式。

案例1：幾乎是我想要的一切...

+-----+----------+---------------+----------+---------------------------------------------------------------------------------------------------------------+ 
| 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：我嘗試排隊浮動點

隨着

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

幫助我試圖將每個浮點都精確地放在一條垂直線上。它可以工作，但在持續時間列中，所有事情都是如此（難）對齊到Notes列中數字的一部分（並且持續時間值左側有很多空間）。似乎正確的填充設置爲點或點之前的數字，而不是整個值。

+-----+----------+---------------+-----------+-------------------------------------------------+ 
| 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. | 
+-----+----------+---------------+-----------+-------------------------------------------------+ 

隨着

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

我得到的幫助下取得更好的成績，但我覺得應該有一個更好的辦法！？

案例3：嘗試包裝筆記文本。

當我使用段落插入筆記文本時，我得到了包裝文本，但列寬非常驚人。我無法完全按照實際輸出得到以下示例。

整個桌子寬度適合文檔（沒有邊距的DIN A4）。但是，似乎每列都有相同的寬度。因此，日期，日期，時間和持續時間列比他們需要的寬得多，Notes列比要求的要窄得多。這兩件事我不能在下面的示例表中呈現，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. | 
+-----+----------+---------------+----------+----------------------+ 

這裏是我使用的代碼：

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) 

我希望有人可以把我在正確的方向。

Answer 1

好的，RTM永遠是個好主意！從ReportLab文檔：

如果單元格值是Flowable或Flowable列表，它們必須具有確定的寬度，或者包含的列必須具有固定的寬度。

解決方案：

from reportlab.lib.units import mm 

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

我想也許有小數點對齊的問題（案例2）可以以同樣的方式來解決，但不起作用。