Python Reportlab 划分表格以适应不同的页面

分类：编程问答

如何解决Python Reportlab 划分表格以适应不同的页面

我正在尝试使用 ReportLab 生成的 PDF 文件构建日程计划器。根据一天中的时间，日程安排会有不同的行：从早上 8:00、早上 8:15、早上 8:30 开始，依此类推。

我做了一个循环，在这个循环中将自动计算小时数并填写时间表。但是，由于我的表格太长，它不能完全适应页面。 （虽然应该在晚上7:30结束，但在下午2:00被截断了）

期望的结果是当表格有大约 20 个活动时有一个分页符。在下一页，标题应该与第一页和下面的表格完全相同，表格的延续。每次需要时都应重复该过程，直到表结束。

enter image description here

Python 代码如下：

from reportlab.pdfgen.canvas import Canvas
from datetime import datetime,timedelta
from reportlab.platypus import Table,TableStyle
from reportlab.lib import colors
from reportlab.lib.pagesizes import letter,landscape


class Vendedor:
    """
    Información del Vendedor: Nombre,sucursal,meta de venta
    """
    def __init__(self,nombre_vendedor,dia_reporte):
        self.nombre_vendedor = nombre_vendedor
        self.sucursal = sucursal
        self.dia_reporte = dia_reporte


class Actividades:
    """
    Información de las Actividades realizadas: Hora de actividad y duración,cliente atendido,tipo de actividad,resultado,monto venta (mxn) + (usd),monto cotización (mxn) + (usd),solicitud de apoyo y comentarios adicionales
    """
    def __init__(self,hora_actividad,duracion_actividad,cliente,tipo_actividad,monto_venta_mxn,monto_venta_usd,monto_cot_mxn,monto_cot_usd,requiero_apoyo,comentarios_extra):
        self.hora_actividad = hora_actividad
        self.duracion_actividad = duracion_actividad
        self.cliente = cliente
        self.tipo_actividad = tipo_actividad
        self.resultado = resultado
        self.monto_venta_mxn = monto_venta_mxn
        self.monto_venta_usd = monto_venta_usd
        self.monto_cot_mxn = monto_cot_mxn
        self.monto_cot_usd = monto_cot_usd
        self.requiero_apoyo = requiero_apoyo
        self.comentarios_extra = comentarios_extra


class PDFReport:
    """
    Crea el Reporte de Actividades diarias en archivo de formato PDF
    """
    def __init__(self,filename):
        self.filename = filename


vendedor = Vendedor('John Doe','Stack Overflow',datetime.now().strftime('%d/%m/%Y'))

file_name = 'cronograma_actividades.pdf'
document_title = 'Cronograma Diario de Actividades'
title = 'Cronograma Diario de Actividades'
nombre_colaborador = vendedor.nombre_vendedor
sucursal_colaborador = vendedor.sucursal
fecha_actual = vendedor.dia_reporte


canvas = Canvas(file_name)
canvas.setPageSize(landscape(letter))
canvas.setTitle(document_title)


canvas.setFont("Helvetica-Bold",20)
canvas.drawCentredString(385+100,805-250,title)
canvas.setFont("Helvetica",16)
canvas.drawCentredString(385+100,785-250,nombre_colaborador + ' - ' + sucursal_colaborador)
canvas.setFont("Helvetica",14)
canvas.drawCentredString(385+100,765-250,fecha_actual)

title_background = colors.fidblue
hour = 8
minute = 0
hour_list = []

data_actividades = [
    {'Hora','Cliente','Resultado de \nActividad','Monto Venta \n(MXN)','Monto Venta \n(USD)','Monto Cotización \n(MXN)','Monto Cotización \n(USD)','Comentarios \nAdicionales'},]

i = 0
for i in range(47):

    if minute == 0:
        if hour <= 12:
            time = str(hour) + ':' + str(minute) + '0 a.m.'
        else:
            time = str(hour-12) + ':' + str(minute) + '0 p.m.'
    else:
        if hour <= 12:
            time = str(hour) + ':' + str(minute) + ' a.m.'
        else:
            time = str(hour-12) + ':' + str(minute) + ' p.m.'

    if minute != 45:
        minute += 15
    else:
        hour += 1
        minute = 0
    hour_list.append(time)

    # I TRIED THIS SOLUTION BUT THIS DIDN'T WORK
    # if i % 20 == 0:
    #     canvas.showPage()

    data_actividades.append([hour_list[i],i,i])

    i += 1

    table_actividades = Table(data_actividades,colWidths=85,rowHeights=30,repeatRows=1)
    tblStyle = TableStyle([
        ('BACKGROUND',(0,0),(-1,title_background),('TEXTCOLOR',colors.whitesmoke),('ALIGN',(1,-1),'CENTER'),('GRID',1,colors.black)
    ])

    rowNumb = len(data_actividades)
    for row in range(1,rowNumb):
        if row % 2 == 0:
            table_background = colors.lightblue
        else:
            table_background = colors.aliceblue

        tblStyle.add('BACKGROUND',row),table_background)

    table_actividades.setStyle(tblStyle)

    width = 150
    height = 150
    table_actividades.wrapOn(canvas,width,height)
    table_actividades.drawOn(canvas,65,(0 - height) - 240)

canvas.save()

我尝试添加：

if i % 20 == 0:
    canvas.showPage()

然而这并没有达到预期的效果。

其他快速说明：尽管我专门对表格的列标题进行了编码。运行程序后，列标题的顺序因某种原因被修改（参见粘贴的图像）。知道为什么会这样吗？

data_actividades = [
    {'Hora',]

非常感谢您，祝您有美好的一天！

解决方法

您应该使用模板，如官方文档第 5 章“PLATYPUS - 页面布局和排版使用脚本”中所述。

基本思想是使用框架，并将您想要添加的所有信息添加到列表元素中。在我的情况下，我将其称为“内容”，使用命令“contents.append(FrameBreak())”，您可以离开框架并处理下一个框架，另一方面，如果您想更改模板的类型，请使用命令“ contents.append(NextPageTemplate('<template_name>'))”

我的建议：

对于您的情况，我使用了两个模板，第一个模板包含带有工作表信息的标题和表格的第一部分，另一个模板对应于其余内容。这些模板的名字是firstpage和laterpage。代码如下：

from reportlab.pdfgen.canvas import Canvas
from datetime import datetime,timedelta
from reportlab.platypus import Table,TableStyle
from reportlab.lib import colors
from reportlab.lib.pagesizes import letter,landscape
from reportlab.platypus import BaseDocTemplate,Frame,Paragraph,PageBreak,\
    PageTemplate,Spacer,FrameBreak,NextPageTemplate,Image
from reportlab.lib.pagesizes import letter,A4
from reportlab.lib.units import inch,cm
from reportlab.lib.styles import getSampleStyleSheet
from reportlab.lib.enums import TA_JUSTIFY,TA_CENTER,TA_LEFT,TA_RIGHT
class Vendedor:
    """
    Información del Vendedor: Nombre,sucursal,meta de venta
    """
    def __init__(self,nombre_vendedor,dia_reporte):
        self.nombre_vendedor = nombre_vendedor
        self.sucursal = sucursal
        self.dia_reporte = dia_reporte


class Actividades:
    """
    Información de las Actividades realizadas: Hora de actividad y duración,cliente atendido,tipo de actividad,resultado,monto venta (mxn) + (usd),monto cotización (mxn) + (usd),solicitud de apoyo y comentarios adicionales
    """
    def __init__(self,hora_actividad,duracion_actividad,cliente,tipo_actividad,monto_venta_mxn,monto_venta_usd,monto_cot_mxn,monto_cot_usd,requiero_apoyo,comentarios_extra):
        self.hora_actividad = hora_actividad
        self.duracion_actividad = duracion_actividad
        self.cliente = cliente
        self.tipo_actividad = tipo_actividad
        self.resultado = resultado
        self.monto_venta_mxn = monto_venta_mxn
        self.monto_venta_usd = monto_venta_usd
        self.monto_cot_mxn = monto_cot_mxn
        self.monto_cot_usd = monto_cot_usd
        self.requiero_apoyo = requiero_apoyo
        self.comentarios_extra = comentarios_extra

class PDFReport:
    """
    Crea el Reporte de Actividades diarias en archivo de formato PDF
    """
    def __init__(self,filename):
        self.filename = filename


vendedor = Vendedor('John Doe','Stack Overflow',datetime.now().strftime('%d/%m/%Y'))

file_name = 'cronograma_actividades.pdf'
document_title = 'Cronograma Diario de Actividades'
title = 'Cronograma Diario de Actividades'
nombre_colaborador = vendedor.nombre_vendedor
sucursal_colaborador = vendedor.sucursal
fecha_actual = vendedor.dia_reporte


canvas = Canvas(file_name,pagesize=landscape(letter))

doc = BaseDocTemplate(file_name)
contents =[]
width,height = A4

left_header_frame = Frame(
    0.2*inch,height-1.2*inch,2*inch,1*inch
    )

right_header_frame = Frame(
    2.2*inch,width-2.5*inch,1*inch,id='normal'
    )

frame_later = Frame(
    0.2*inch,0.6*inch,(width-0.6*inch)+0.17*inch,height-1*inch,leftPadding = 0,topPadding=0,showBoundary = 1,id='col'
    )

frame_table= Frame(
    0.2*inch,0.7*inch,height-2*inch,id='col'
    )
laterpages = PageTemplate(id='laterpages',frames=[frame_later])

firstpage = PageTemplate(id='firstpage',frames=[left_header_frame,right_header_frame,frame_table],)

contents.append(NextPageTemplate('firstpage'))
logoleft = Image('logo_power.png')
logoleft._restrictSize(1.5*inch,1.5*inch)
logoleft.hAlign = 'CENTER'
logoleft.vAlign = 'CENTER'

contents.append(logoleft)
contents.append(FrameBreak())
styleSheet = getSampleStyleSheet()
style_title = styleSheet['Heading1']
style_title.fontSize = 20 
style_title.fontName = 'Helvetica-Bold'
style_title.alignment=TA_CENTER

style_data = styleSheet['Normal']
style_data.fontSize = 16 
style_data.fontName = 'Helvetica'
style_data.alignment=TA_CENTER

style_date = styleSheet['Normal']
style_date.fontSize = 14
style_date.fontName = 'Helvetica'
style_date.alignment=TA_CENTER

canvas.setTitle(document_title)

contents.append(Paragraph(title,style_title))
contents.append(Paragraph(nombre_colaborador + ' - ' + sucursal_colaborador,style_data))
contents.append(Paragraph(fecha_actual,style_date))
contents.append(FrameBreak())

title_background = colors.fidblue
hour = 8
minute = 0
hour_list = []

data_actividades = [
    {'Hora','Cliente','Resultado de \nActividad','Monto Venta \n(MXN)','Monto Venta \n(USD)','Monto Cotización \n(MXN)','Monto Cotización \n(USD)','Comentarios \nAdicionales'},]

i = 0
for i in range(300):

    if minute == 0:
        if hour <= 12:
            time = str(hour) + ':' + str(minute) + '0 a.m.'
        else:
            time = str(hour-12) + ':' + str(minute) + '0 p.m.'
    else:
        if hour <= 12:
            time = str(hour) + ':' + str(minute) + ' a.m.'
        else:
            time = str(hour-12) + ':' + str(minute) + ' p.m.'

    if minute != 45:
        minute += 15
    else:
        hour += 1
        minute = 0
    hour_list.append(time)

    # I TRIED THIS SOLUTION BUT THIS DIDN'T WORK
    # if i % 20 == 0:
    

    data_actividades.append([hour_list[i],i,i])

    i += 1

    table_actividades = Table(data_actividades,colWidths=85,rowHeights=30,repeatRows=1)
    tblStyle = TableStyle([
        ('BACKGROUND',(0,0),(-1,title_background),('TEXTCOLOR',colors.whitesmoke),('ALIGN',(1,-1),'CENTER'),('GRID',1,colors.black)
    ])

    rowNumb = len(data_actividades)
    for row in range(1,rowNumb):
        if row % 2 == 0:
            table_background = colors.lightblue
        else:
            table_background = colors.aliceblue

        tblStyle.add('BACKGROUND',row),table_background)

    table_actividades.setStyle(tblStyle)

    width = 150
    height = 150
    
contents.append(NextPageTemplate('laterpages'))
contents.append(table_actividades)


contents.append(PageBreak())


doc.addPageTemplates([firstpage,laterpages])
doc.build(contents)

结果

有了这个，您可以添加任意数量的记录，我尝试了 300。该表不是完全可见的，因为为了方便起见，我制作了 A4 大小的 pdf。但是，任何尺寸的原理都是相同的，因此您必须使用框架的大小和pdf页面的大小。

enter image description here enter image description here

额外，在每个页面上添加标题

由于现在只需要一个模板，“first_page”模板应该被删除，因为它对所有页面都是相同的。按照您在开始时提出的相同方式，我每 21 条记录（以包括表的标题）切割表格，并将其分组在一个列表中，然后在每个循环中迭代添加带有徽标的标题。也包含在逻辑切割语句中，记录数未达到21但记录数即将结束的情况。代码如下：

canvas = Canvas(file_name,id='normal'
    )

frame_table= Frame(
    0.2*inch,id='col'
    )

laterpages = PageTemplate(id='laterpages',)

logoleft = Image('logo_power.png')
logoleft._restrictSize(1.5*inch,1.5*inch)
logoleft.hAlign = 'CENTER'
logoleft.vAlign = 'CENTER'


styleSheet = getSampleStyleSheet()
style_title = styleSheet['Heading1']
style_title.fontSize = 20 
style_title.fontName = 'Helvetica-Bold'
style_title.alignment=TA_CENTER

style_data = styleSheet['Normal']
style_data.fontSize = 16 
style_data.fontName = 'Helvetica'
style_data.alignment=TA_CENTER

style_date = styleSheet['Normal']
style_date.fontSize = 14
style_date.fontName = 'Helvetica'
style_date.alignment=TA_CENTER

canvas.setTitle(document_title)


title_background = colors.fidblue
hour = 8
minute = 0
hour_list = []

data_actividades = [
    {'Hora',]

i = 0
table_group= []
size = 304

count = 0
for i in range(size):

    if minute == 0:
        if hour <= 12:
            time = str(hour) + ':' + str(minute) + '0 a.m.'
        else:
            time = str(hour-12) + ':' + str(minute) + '0 p.m.'
    else:
        if hour <= 12:
            time = str(hour) + ':' + str(minute) + ' a.m.'
        else:
            time = str(hour-12) + ':' + str(minute) + ' p.m.'

    if minute != 45:
        minute += 15
    else:
        hour += 1
        minute = 0
    hour_list.append(time)    

    data_actividades.append([hour_list[i],table_background)

    table_actividades.setStyle(tblStyle)

    if ((count >= 20) or (i== size) ):
        count = 0
        table_group.append(table_actividades)
        data_actividades = [
            {'Hora',]
    width = 150
    height = 150
    count += 1
    if i > size:

        break

contents.append(NextPageTemplate('laterpages'))

for table in table_group:

    contents.append(logoleft)
    contents.append(FrameBreak())
    contents.append(Paragraph(title,style_title))
    contents.append(Paragraph(nombre_colaborador + ' - ' + sucursal_colaborador,style_data))
    contents.append(Paragraph(fecha_actual,style_date))
    contents.append(FrameBreak()) 
    contents.append(table)
    contents.append(FrameBreak())

doc.addPageTemplates([laterpages,])
doc.build(contents)

额外 - 结果：

enter image description here

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