Python实现的二维码生成小软件
程序员文章站
2022-10-11 22:23:54
前几天,我估摸着做一个能生成qr code小程序,并能用wxpython在屏幕上显示出来。当然,我想用纯python实现,观望了一会后,我找到了三个候选:
github...
前几天,我估摸着做一个能生成qr code小程序,并能用wxpython在屏幕上显示出来。当然,我想用纯python实现,观望了一会后,我找到了三个候选:
github 上的
sourceforge上的
goolge code 上的
我尝试了python-qrcode以及pyqrnative,因为它们能够运行在windows/mac/linux。也不需要依赖额外的其他库除了python图像库。pyqrcode项目需要其他一些先决条件,并且不能在windows上运行,所以我不想与之纠缠了。我最后使用了一些以前写过的一个photo viewer程序的代码,然后稍微地修改了一下,就成了qrcode的查看器了。
开始
正如我上面提到的,你只需要python图像库,gui部分我们将使用wxpython。python-qrcode相比pyqrnative生成图片更快,并包含了你见过的大多数qr码类型。
生成 qr codes
当你准备好所有需要的以后,你可以运行以下代码,看看python做了些啥:
import os import wx try: import qrcode except importerror: qrcode = none try: import pyqrnative except importerror: pyqrnative = none ######################################################################## class qrpanel(wx.panel): """""" #---------------------------------------------------------------------- def __init__(self, parent): """constructor""" wx.panel.__init__(self, parent=parent) self.photo_max_size = 240 sp = wx.standardpaths.get() self.defaultlocation = sp.getdocumentsdir() img = wx.emptyimage(240,240) self.imagectrl = wx.staticbitmap(self, wx.id_any, wx.bitmapfromimage(img)) qrdatalbl = wx.statictext(self, label="text to turn into qr code:") self.qrdatatxt = wx.textctrl(self, value="http://www.mousevspython.com", size=(200,-1)) instructions = "name qr image file" instructlbl = wx.statictext(self, label=instructions) self.qrphototxt = wx.textctrl(self, size=(200,-1)) browsebtn = wx.button(self, label='change save location') browsebtn.bind(wx.evt_button, self.onbrowse) deflbl = "default save location: " + self.defaultlocation self.defaultlocationlbl = wx.statictext(self, label=deflbl) qrcodebtn = wx.button(self, label="create qr with qrcode") qrcodebtn.bind(wx.evt_button, self.onuseqrcode) pyqrnativebtn = wx.button(self, label="create qr with pyqrnative") pyqrnativebtn.bind(wx.evt_button, self.onusepyqr) # create sizer self.mainsizer = wx.boxsizer(wx.vertical) qrdatasizer = wx.boxsizer(wx.horizontal) locationsizer = wx.boxsizer(wx.horizontal) qrbtnsizer = wx.boxsizer(wx.vertical) qrdatasizer.add(qrdatalbl, 0, wx.all, 5) qrdatasizer.add(self.qrdatatxt, 1, wx.all|wx.expand, 5) self.mainsizer.add(wx.staticline(self, wx.id_any), 0, wx.all|wx.expand, 5) self.mainsizer.add(qrdatasizer, 0, wx.expand) self.mainsizer.add(self.imagectrl, 0, wx.all, 5) locationsizer.add(instructlbl, 0, wx.all, 5) locationsizer.add(self.qrphototxt, 0, wx.all, 5) locationsizer.add(browsebtn, 0, wx.all, 5) self.mainsizer.add(locationsizer, 0, wx.all, 5) self.mainsizer.add(self.defaultlocationlbl, 0, wx.all, 5) qrbtnsizer.add(qrcodebtn, 0, wx.all, 5) qrbtnsizer.add(pyqrnativebtn, 0, wx.all, 5) self.mainsizer.add(qrbtnsizer, 0, wx.all|wx.center, 10) self.setsizer(self.mainsizer) self.layout() #---------------------------------------------------------------------- def onbrowse(self, event): """""" dlg = wx.dirdialog(self, "choose a directory:", style=wx.dd_default_style) if dlg.showmodal() == wx.id_ok: path = dlg.getpath() self.defaultlocation = path self.defaultlocationlbl.setlabel("save location: %s" % path) dlg.destroy() #---------------------------------------------------------------------- def onuseqrcode(self, event): """ https://github.com/lincolnloop/python-qrcode """ qr = qrcode.qrcode(version=1, box_size=10, border=4) qr.add_data(self.qrdatatxt.getvalue()) qr.make(fit=true) x = qr.make_image() qr_file = os.path.join(self.defaultlocation, self.qrphototxt.getvalue() + ".jpg") img_file = open(qr_file, 'wb') x.save(img_file, 'jpeg') img_file.close() self.showqrcode(qr_file) #---------------------------------------------------------------------- def onusepyqr(self, event): """ http://code.google.com/p/pyqrnative/ """ qr = pyqrnative.qrcode(20, pyqrnative.qrerrorcorrectlevel.l) qr.adddata(self.qrdatatxt.getvalue()) qr.make() im = qr.makeimage() qr_file = os.path.join(self.defaultlocation, self.qrphototxt.getvalue() + ".jpg") img_file = open(qr_file, 'wb') im.save(img_file, 'jpeg') img_file.close() self.showqrcode(qr_file) #---------------------------------------------------------------------- def showqrcode(self, filepath): """""" img = wx.image(filepath, wx.bitmap_type_any) # scale the image, preserving the aspect ratio w = img.getwidth() h = img.getheight() if w > h: neww = self.photo_max_size newh = self.photo_max_size * h / w else: newh = self.photo_max_size neww = self.photo_max_size * w / h img = img.scale(neww,newh) self.imagectrl.setbitmap(wx.bitmapfromimage(img)) self.refresh() ######################################################################## class qrframe(wx.frame): """""" #---------------------------------------------------------------------- def __init__(self): """constructor""" wx.frame.__init__(self, none, title="qr code viewer", size=(550,500)) panel = qrpanel(self) if __name__ == "__main__": app = wx.app(false) frame = qrframe() frame.show() app.mainloop()
python-qrcode生成效果图:
pyqrnative生成效果图:
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