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This article mainly explains "how to make a QR code generator with Python". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to make a QR code generator with Python.

Prepare for

This QR code generator is composed of qrcode (generate QR code) library and tkinter (graphical ui interface). First install the following three modules on the command line, namely qrcode, image, and pillow (PIL). The installation is simple.

Pip install qrcodepip install imagepip install pillow

After the installation is complete, import the following modules and methods directly into the py file:

From tkinter import * from tkinter.filedialog import * from PIL import Image,ImageTkimport qrcode specific steps

1 write ui interface

After importing the module, the ui interface is written directly with the tkinter module. The ui interface here is:

The specific code is as follows:

Root = Tk () root.title ("QR code generator") root.geometry ('600x400QR 100') button1 = Button (root,text =' select icon', font = ('Song style', 20), fg = 'green',bg =' white',command = openfile) # set button button2 = Button (root,text = 'save QR code', font = ('Song style', 20), fg = 'green',bg =' white',command = savefile) # set button button1.place (x = 90) Y = 330Magnum width = 120department height = 50) # display button button2.place (x = 385 Magi width = 150) # display button label1 = Label (root,text = 'input link', font = ('Arial', 20), fg = 'black',bg =' white') # setting component label1.place (x = 235, entry1 = 5width = 130) entry1 = Entry (root,font = ('Arial') (20) # set the input box entry1.place (x = 50primey = 60magnum width = 510magnum height = 30) # display component canvas1 = Canvas (root,width = 300ZHI height = 300ZHI BG = "white") # create canvas canvas2 = Canvas (root,width = 300LHI height = 300LBG = "white") # create canvas canvas1.place (x = 50ZHAY = 100ZHI width = 200ZHI = 200) canvas2.place (x = 360ZHY = 100ZHI height = 200) button = Button (root Text = 'generate', font = ('Song style', 15), fg = 'black',bg =' pink',command = creat) # set button button.place (x = 280Magi y = 200jue width = 50cHH = 40) # display button root.mainloop ()

Basic usage of Tkinter there is a related usage in this official account, you can search for the keyword tkinter to read.

Here is only a brief description of the meaning of some methods and parameters.

The Button () method creates a button component, where command is the event bound by clicking the button (function method).

Place () is a layout mode, the parameter XMagine y is the coordinate of the relative ui interface, and width and height are the display width and height.

Label () is a display text component, such as the "input link" in figure 3.1.

Entry () is the input box component, which is used to receive links. Use entry.get () to get the contents.

Canvas () is the canvas component, which is used to display icons and QR codes.

The font parameter is a font. Where you can set the font style and size.

2 generate QR code

The ui interface of the program has been written, and you only need to complete the comman parameter in the button. There are three ways. Let's take a look at the selection icon first.

Def openfile (): global filename,image_name filename = askopenfilename () image_name = Image.open (filename) image_name = image_name.resize ((200,200), Image.ANTIALIAS) # Zoom image im_root = ImageTk.PhotoImage (image_name) # preset opened image canvas1.create_image (100Magi 100Cinematic root) # embed preset image canvas1.place (x = 50Ciny = 100Magi width = 200W) Height = 200) root.mainloop ()

It only talks about askopenfilename (), which is a method of the filedialog class in the tikinter module, which returns the path of the file you currently selected. Then use the image module to open the picture and zoom as required, and finally display on the canvas.

Then there is the generating function:

Def creat (): global img qr = qrcode.QRCode (version=2, error_correction=qrcode.constants.ERROR_CORRECT_Q, box_size=10, border=1) url = entry1.get () qr.add_data (url) qr.make (fit=True) img = qr.make_image () img = img.convert ("RGBA") icon = image_name icon = icon.convert ("RGBA") imgWight ImgHeight = img.size iconWight = int (imgWight / 3) iconHeight = int (imgHeight / 3) icon = icon.resize ((iconWight, iconHeight), Image.ANTIALIAS) posW = int ((imgWight-iconWight) / 2) posH = int ((imgHeight-iconHeight) / 2) img.paste (icon, (posW, posH), icon) img1 = img.resize Image.ANTIALIAS) im_root = ImageTk.PhotoImage (img1) # preset open image canvas2.create_image (100Magi 100Magi imprint root) # embed preset image canvas2.place (x = 360 ~ y = 100 ~ 200 width = 200) root.mainloop ()

The qr part is the configuration of the QR code.

The version parameter is from 1 to 40, an integer that controls the size of the QR code (the smallest, version 1, is a 21 × 21 matrix). Set to None and use the fit parameter when making the code automatically determine.

Error_correction parameter control is used for error correction of QR codes. The following four constants are provided in the qrcode package:

ERROR_CORRECT_L

About 7% or less of errors can be corrected.

ERROR_CORRECT_M (default)

About 15% or less of errors can be corrected.

ERROR_CORRECT_Q

About 25% or less of errors can be corrected.

ERROR_CORRECT_H .

About 30% or less of errors can be corrected.

The box_size parameter controls how many pixels there are in each QR code grid.

The border parameter controls how much the box thickness should be (the default is 4, which is the minimum according to the specification).

Add_data () is the link to the QR code, where you directly get the contents of the input box.

Then the following content is to control the relative size and position of the icon and the QR code. The parameters in the above section are all from the official documentation of qrcode. For details, please go to the official website: https://pypi.org/project/qrcode/5.1/

After this method is written, enter the link, click generate, and you can generate a QR code with an icon.

Finally, save the QR code:

Def savefile (): pathname = asksaveasfilename (defaultextension = '.png', initialfile = 'new QR code .png') img.save (pathname)

Asksavesfilename is also the path where the file is saved, and the next two parameters are the default image format and the default file name. Finally, click to save the QR code and you are done.

Finally, open the saved folder, check it, and find that the QR code has been generated successfully.

4 complete code

From tkinter import * from tkinter.filedialog import * from PIL import Image,ImageTkimport qrcodedef openfile (): global filename,image_name filename = askopenfilename () image_name = Image.open (filename) image_name = image_name.resize ((200,200), Image.ANTIALIAS) # Zoom image im_root = ImageTk.PhotoImage (image_name) # preset opened image canvas1.create_image (100meme 100Jing imageimageimageimageimageimageimageimageimageimageimageimages root) # embed the preset image canvas1.place (x = 50 Root.mainloop () def creat (): global img qr = qrcode.QRCode (version=2, error_correction=qrcode.constants.ERROR_CORRECT_Q, box_size=10) Border=1 url = entry1.get () qr.add_data (url) qr.make (fit=True) img = qr.make_image () img = img.convert ("RGBA") icon = image_name icon = icon.convert ("RGBA") imgWight, imgHeight = img.size iconWight = int (imgWight / 3) iconHeight = int (imgHeight / 3) icon = icon.resize ((iconWight, iconHeight) Image.ANTIALIAS) posW = int ((imgWight-iconWight) / 2) posH = int ((imgHeight-iconHeight) / 2) img.paste (icon, (posW, posH), icon) img1 = img.resize ((200,200), Image.ANTIALIAS) im_root = ImageTk.PhotoImage (img1) # preset opened image canvas2.create_image (100Magazine imageimageimageimageimages imprinted root) # embed the preset picture canvas2.place (x = 360 camera y = 100) Root.mainloop () def savefile (): pathname = asksaveasfilename (defaultextension = '.png', initialfile = 'new QR code .png') img.save (pathname) root = Tk () root.title ("QR code generator") root.geometry ('600x400' 400mm 100') button1 = Button (root,text = 'select icon', font = ('Verdana', 20), fg = 'green',bg =' white',command = openfile) # set button button2 = Button (root Text = 'save QR code', font = ('Verdana', 20), fg = 'green',bg =' white',command = savefile) # set button button1.place (x = 90 ~ y = 330 ~ ~ width = 120 ~ height = 50) # display button button2.place (x = 385 ~ ~ y = 330 ~ ~ width = 150 ~ height = 50) # display button label1 = Label (root,text = 'input link', font = ('Arial', 20), fg = 'black'' Bg = 'white') # setting component label1.place (x = 235) entry1 = Entry (root,font = (' Song style', 20)) # setting input box entry1.place (x = 50 department y = 60 department width = 510 department height = 30) # display component canvas1 = Canvas (root,width = 300 department height = 300 white) # create canvas canvas2 = Canvas (root,width = 300 height = 300) Bg = "white") # create canvas canvas1.place (x = 50Magi y = 100jiggle width = 200pl height = 200) canvas2.place (x = 360PowerWidth = 200lle height = 200) button = Button (root,text = 'generate', font = ('Verdana', 15), fg = 'black',bg =' pink',command = creat) # set button button.place (x = 280Pert y = 200pr width = 50line height = 40) # display button root.mainloop ()

Finally, you can also use the method shared by the editor before about the packaging of Python files, and package the program into exe files for your own and others' convenience.

At this point, I believe you have a deeper understanding of "how to make a QR code generator in Python". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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