Reportlab Fehler nach Seitenumbruch

Question

Ich entwerfe ein zweiseitiges Formular zum Drucken Duplex. Nachdem ich einen Seitenumbruch hinzufügen, bekomme ich folgende Fehlermeldung:

File "f:\Dropbox\pms\pms_reports.py", line 450, in <module> 
    a = Key_card1() 
File "f:\Dropbox\pms\pms_reports.py", line 441, in __init__ 
    doc.build(elements) 
File "c:\Python34\Lib\site-packages\reportlab\platypus\doctemplate.py", line 1171, in build 
    BaseDocTemplate.build(self,flowables, canvasmaker=canvasmaker) 
File "c:\Python34\Lib\site-packages\reportlab\platypus\doctemplate.py", line 927, in build 
    self.handle_flowable(flowables) 
File "c:\Python34\Lib\site-packages\reportlab\platypus\doctemplate.py", line 775, in handle_flowable 
    self.handle_keepWithNext(flowables) 
File "c:\Python34\Lib\site-packages\reportlab\platypus\doctemplate.py", line 742, in handle_keepWithNext 
    while i<n and flowables[i].getKeepWithNext(): i += 1 

builtins.TypeError: getKeepWithNext() missing 1 required positional argument: 'self' 

Hier ist mein Code:

from reportlab.lib.pagesizes import A4, landscape 
from reportlab.platypus import SimpleDocTemplate, Table, TableStyle, Paragraph, PageBreak 
from reportlab.lib.styles import getSampleStyleSheet 

    class Key_card1(): 
    def __init__(self, start_date=datetime.now(), room="1", 
      end_date=datetime.now()+timedelta(days=1), password = "999999"): 
     stylesheet = getSampleStyleSheet() 
     doc = SimpleDocTemplate("key_card.pdf", pagesize=A4) 

     if password == "999999": 
      password = str(random.randint(10000,99999)) 

     roomno = "Room" + room 
     w_text = [] 
     w_text.append(Paragraph("To use the wireless broadband…:",stylesheet["BodyText"])) 
     w_text.append(Paragraph("User id: <b>" + roomno + "</b>", stylesheet["BodyText"])) 
     w_text.append(Paragraph("Password: <b>" + password + "</b>", stylesheet["BodyText"])) 

     message_text = [] 
     message_text.append(Paragraph("Our current menus ...", stylesheet["BodyText"])) 
     message_text.append(Paragraph("Our restaurant can get very busy ...",stylesheet["BodyText"])) 
     message_text.append(Paragraph("Your shower has a safety device to...", stylesheet["BodyText"])) 
     message_text .append(Paragraph("Please do not hesitate to call...",stylesheet["BodyText"])) 


     elements=[] 
     table_data = [(w_text, message_text)] 
     the_table = Table(table_data) 
     the_table.setStyle(TableStyle([('VALIGN',(0,0),(-1,-1),'MIDDLE')])) 
     elements.append(the_table) 
     elements.append(PageBreak) 

     #Cover page 
     logo= "y:\marketing\priory_master_logo bw.jpg" 
     im = Image(logo, 3*cm, 1.258*cm) 

     cover_data = [] 
     cover_data.append(im) 
     cover_data.append(Paragraph("Room number : " + room, stylesheet["BodyText"])) 
     left_cell =[] 
     left_cell.append(Paragraph(" ", stylesheet["BodyText"])) 


     table_data1 = [(left_cell, cover_data)] 
     the_table1 = Table(table_data1) 
     the_table1.setStyle(TableStyle([('VALIGN',(0,0),(-1,-1),'MIDDLE')])) 
     elements.append(the_table1) 


     doc.build(elements) 

Ich versuchte, die Reportlab Module zu modifizieren, aber ich war nicht erfolgreich. Hat jemand Ideen?

Answer 1

Ich habe versucht, den Fehler zu verstehen, und ich schätze, es gibt ein Problem in doc = SimpleDocTemplate("key_card.pdf", pagesize=A4). Das Problem kann das Argument "key_card.pdf" sein. Ich bin nicht sicher

Edit: Vielleicht, BaseDocTemplate.build(self,flowables, canvasmaker=canvasmaker) Problem ist über "Flowables" Argument, die Elementen in doc.build verbunden ist (Elemente)

LÖSUNG -> elements.append (Seitenumbruch) sollten Elemente sein. anhängen (PageBreak())