发布于 2018-02-24 12:54:54 | 255 次阅读 | 评论: 0 | 来源: 网友投递
Python编程语言
Python 是一种面向对象、解释型计算机程序设计语言,由Guido van Rossum于1989年底发明,第一个公开发行版发行于1991年。Python语法简洁而清晰,具有丰富和强大的类库。它常被昵称为胶水语言,它能够把用其他语言制作的各种模块(尤其是C/C++)很轻松地联结在一起。
条形码和二维码
#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, c, 15, 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,0,0,45./height,0,0])
d.add(qr_code)
renderPDF.draw(d, c, 15, 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()
运行结果:
以上这篇Python之ReportLab绘制条形码和二维码的实例就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持PHPERZ。