我想用Python转换xlsx。我使用模块tablib和xtopdf来构建结构良好的表。效果很好！不幸的是，内容不适合一个pdf页面。所以我想将pagesize和format格式更改为水平A3。但我不知道这是怎么回事。我的代码：
import random
import tablib
from openpyxl import load_workbook
from xtopdf import PDFWriter
from pyPdf import PdfFileWriter, PdfFileReader
workbook = load_workbook('C:/Users/user1/Testexcel.xlsx', guess_types=True, data_only=True)
worksheet = workbook.get_sheet_by_name('Testsheet')
ws_range = worksheet.iter_rows('A4:H6')
# Helper function to output a string to both screen and PDF.
def print_and_write(pw, strng):
print strng
pw.writeLine(strng)
# Create an empty Dataset and set its headers.
data = tablib.Dataset()
data.headers = ['col1', 'col2', 'col3', 'col4']
widths = [30, 20, 10, 20] # Display widths for columns.
for row in ws_range:
col1 = str(row[0].value)
col2 = str(row[1].value)
col3 = str(row[2].value)
col4 = str(row[3].value)
columns = [col1, col2, col3, col4]
row = [ str(col).center(widths[idx]) for idx, col in enumerate(columns) ]
data.append(row)
# Set up the PDFWriter.
pw = PDFWriter('C:/Users/user1/Test.pdf')
pw.setFont('Courier', 10)
pw.setHeader('Test')
pw.setFooter('Test')
# Generate header and data rows as strings; output them to screen and PDF.
separator = '-' * sum(widths)
print_and_write(pw, separator)
# Output headers
header_strs = [ header.center(widths[idx]) for idx, header in enumerate(data.headers) ]
print_and_write(pw, ''.join(header_strs))
print_and_write(pw, separator)
# Output data
for row in data:
print_and_write(pw, ''.join(row))
print_and_write(pw, separator)
pw.close()
发现xtopdf本身的PDFWriter实现了reportlab库的canvas对象。在canvas类中声明了一个属性pagesize，它默认设置为＆＃39; A4＆＃39;。但是，如果我将条目更改为＆＃39; A3＆＃39;结果pdf仍然在＆＃39; A4＆＃39;。
class Canvas(textobject._PDFColorSetter):
from reportlab.pdfgen import canvas
c = canvas.Canvas("hello.pdf")
from reportlab.lib.units import inch
# move the origin up and to the left
c.translate(inch,inch)
# define a large font
c.setFont("Helvetica", 80)
# choose some colors
c.setStrokeColorRGB(0.2,0.5,0.3)
c.setFillColorRGB(1,0,1)
# draw a rectangle
c.rect(inch,inch,6*inch,9*inch, fill=1)
# make text go straight up
c.rotate(90)
# change color
c.setFillColorRGB(0,0,0.77)
# say hello (note after rotate the y coord needs to be negative!)
c.drawString(3*inch, -3*inch, "Hello World")
c.showPage()
c.save()
"""
def __init__(self,filename,
pagesize='A3',
bottomup = 1,
pageCompression=None,
encoding = None,
invariant = None,
verbosity=0):
"""Create a canvas of a given size. etc.
You may pass a file-like object to filename as an alternative to
a string.
Most of the attributes are private - we will use set/get methods
as the preferred interface. Default page size is A4."""
if pagesize is None: pagesize = 'A3'
if encoding is None: encoding = rl_config.defaultEncoding
if invariant is None: invariant = rl_config.invariant
self._filename = filename
self._encodingName = encoding
self._doc = pdfdoc.PDFDocument(encoding,
compression=pageCompression,
invariant=invariant, filename=filename)
#this only controls whether it prints 'saved ...' - 0 disables
self._verbosity = verbosity
#this is called each time a page is output if non-null
self._onPage = None
self._pagesize = pagesize
self._pageRotation = 0
#self._currentPageHasImages = 0
self._pageTransition = None
self._pageDuration = None
self._destinations = {} # dictionary of destinations for cross indexing.
self.setPageCompression(pageCompression)
self._pageNumber = 1 # keep a count
#self3 = [] #where the current page's marking operators accumulate
# when we create a form we need to save operations not in the form
self._codeStack = []
self._restartAccumulators() # restart all accumulation state (generalized, arw)
self._annotationCount = 0
self._outlines = [] # list for a name tree
self._psCommandsBeforePage = [] #for postscript tray/font commands
self._psCommandsAfterPage = [] #for postscript tray/font commands
#PostScript has the origin at bottom left. It is easy to achieve a top-
#down coord system by translating to the top of the page and setting y
#scale to -1, but then text is inverted. So self.bottomup is used
#to also set the text matrix accordingly. You can now choose your
#drawing coordinates.
self.bottomup = bottomup
self.imageCaching = rl_config.defaultImageCaching
self._make_preamble()
self.init_graphics_state()
self.state_stack = []
编辑：我认为reportlab模块中的更改不被系统接受。试图删除字典reportlab并尝试在命令行中导入它。具有讽刺意味的是，虽然python不再能找到那个模块，但它可以工作。
答案 0 :(得分：1)
试试这个
from reportlab.pdfgen import canvas
from reportlab.lib.units import mm
c = canvas.Canvas("hello.pdf", pagesize = (297 * mm, 420 * mm))
# or (420 * mm, 297 * mm) if you want it in portrait format
# values for inch: 11.69 * inch , 16.53 * inch
#the following would create an empty page
c.showPage()
c.save()
答案 1 :(得分：0)
只需forked a project named xtopdf at bitbucket并进行了以下更改：
##------------------------ PDFWriter.__init__ ----------------------------
- def __init__(self, pdf_fn):
+ def __init__(self, pdf_fn, pagesize='A4'):
'''
Constructor.
"pdf_fn" arg is the name of the PDF file to be created.
'''
self.__pdf_fn = pdf_fn # file name of PDF file
- self.__canv = canvas.Canvas(pdf_fn) # canvas to write on
+ self.__canv = canvas.Canvas(pdf_fn, pagesize) # canvas to write on
self.__font_name = None # font name
self.__font_size = None # font size
self.__header_str = None # header string (partial)
pw = PDFWriter('C:/Users/user1/Test.pdf', 'A3')。