Python QR code generation Software

This article mainly introduces the QR code generation software implemented by Python. It is implemented using wxPython, python-qrcode, pyqrcode, pyqrnative, and other open-source libraries. For more information, see the following days, I estimate that I can build a QR Code Applet and display it on the screen using wxPython. Of course, I want to implement it in Python only. After a while, I found three candidates:

Python-qrcode on github
Pyqrcode on sourceforge
Pyqrnative on Goolge code

I tried python-qrcode and pyqrnative because they can run on Windows/Mac/Linux. You do not need to rely on additional libraries except the Python Image Library. The pyqrcode project requires other prerequisites and cannot run on Windows, so I don't want to get involved. I finally used some previously written code of a Photo Viewer program, and then slightly modified it to become the QRCode Viewer.

Start

As I mentioned above, you only need the Python image library. We will use wxPython In the GUI section. Python-qrcode generates images faster than pyqrnative, and contains most of the QR code types you have seen.

Generate QR Codes

After you have prepared all the required items, you can run the following code to see what Python has done:

import osimport wx try:  import qrcodeexcept ImportError:  qrcode = None try:  import PyQRNativeexcept 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 generation:

PyQRNative generation: