Python之ReportLab绘制条形码和二维码的实例

#引入所需要的基本包
from reportlab.pdfgen import canvas
from reportlab.graphics.barcode import code39,code128,code93
from reportlab.graphics.barcode import eanbc,qr,usps
from reportlab.graphics.shapes import Drawing 
from reportlab.lib.units import mm
from reportlab.graphics import renderPDF
#----------------------------------------------------------------------
def createBarCodes(c):
  barcode_value = "1234567890"
  barcode39 = code39.Extended39(barcode_value)
  barcode39Std = code39.Standard39(barcode_value,barHeight=20,stop=1)
  # code93 also has an Extended and MultiWidth version
  barcode93 = code93.Standard93(barcode_value)
  barcode128 = code128.Code128(barcode_value)
  # the multiwidth barcode appears to be broken 
  #barcode128Multi = code128.MultiWidthBarcode(barcode_value)
  barcode_usps = usps.POSTNET("50158-9999")
  codes = [barcode39,barcode39Std,barcode93,barcode128,barcode_usps]
  x = 1 * mm
  y = 285 * mm
  for code in codes:
    code.drawOn(c,x,y)
    y = y - 15 * mm
  # draw the eanbc8 code
  barcode_eanbc8 = eanbc.Ean8BarcodeWidget(barcode_value)
  d = Drawing(50,10)
  d.add(barcode_eanbc8)
  renderPDF.draw(d,c,15,555)
  # draw the eanbc13 code
  barcode_eanbc13 = eanbc.Ean13BarcodeWidget(barcode_value)
  d = Drawing(50,10)
  d.add(barcode_eanbc13)
  renderPDF.draw(d,465)
  # draw a QR code
  qr_code = qr.QrCodeWidget('http://blog.csdn.net/webzhuce')
  bounds = qr_code.getBounds()
  width = bounds[2] - bounds[0]
  height = bounds[3] - bounds[1]
  d = Drawing(45,45,transform=[45./width,45./height,0])
  d.add(qr_code)
  renderPDF.draw(d,405)
#定义要生成的pdf的名称
c=canvas.Canvas("barcodes.pdf")
#调用函数生成条形码和二维码，并将canvas对象作为参数传递
createBarCodes(c)
#showPage函数：保存当前页的canvas
c.showPage()
#save函数：保存文件并关闭canvas
c.save()