One , Development needs and ideas

1. Development requirements

Do you have such a need ： Using mailbox （qq Email or 163 mailbox ） when , Many times we need to log in again （ Or at intervals ）, So if you forget your password , Resetting will be a painful thing , Combined with the , We use email very often , Can there be a product that allows us not to log in to our account , At the same time, like desktop applications, you don't have to log in to the web mailbox website , So as to meet our basic function of sending e-mail ？ The answer is yes ！
Open source IT Time , We have many methods and tools to achieve our needs , As a geek , We can find out SMTP A special email sending process behind the protocol ： Based on mailbox service provider server （IMAP,SMTP,POS3 etc. ） To bind the corresponding program , So as to achieve login free , The secondary program development realizes the mail sending function （ Just a simple understanding , Baidu ）.
At the end of the paper, the GitHub Address Links ！

2. The development train of thought

python Is a super language with a powerful third-party library , We can choose a simple and easy-to-use third-party library ！ After comparison, the author found that python Of yagmail Library is a good choice , The basic configuration is simple and not complex ！
in addition , What we need to develop is product level , Then you can't open the code at runtime , We need to design something with UI Interactive interface program , because python Bring their own tkinter library , We can use it to GUI Development is relatively convenient and simple . We can also add program window icons , Add your favorite picture as the background ！
In order to make the finished program available to more users , At the same time, ensure the security of their respective mailboxes , When we configure personal email privacy information , The configuration file is written locally and manually ini, This makes the finished program portable , also , You can modify your mailbox configuration information at any time ！

3. Preparation

The configuration method of mailbox website is as follows ：
python- be based on yagmail Library to develop automatic mail sending program

Two , Write code

1. Code module

（1）MAIL.py

The MAIL.py Files are mainly placed in MAIL class , Save the main account configuration ！

import yagmail# Core library of mailbox sender 
import configparser# Library used to manage configuration files 
import os
class MAIL:# mailbox MAIL class , Save the main account configuration 
    def __init__(self):
        # yagmail Library basic parameter settings 
        self.config = configparser.ConfigParser()
        self.config.read('MailConfig.ini')# Read configuration file , Ensure that the file exists before opening the program , After the program, press the corresponding function to regenerate the initialization configuration file 
        user = self.config['DEFAULT']['user']  #  Corresponding to your own email account 
        password =self.config['DEFAULT']['password'] #  The service password corresponding to your email application , The blog has links to introduce the steps , Not the login password of your mailbox 
        port = self.config['DEFAULT']['port'] #  Mailbox server port 
        host = self.config['DEFAULT']['host'] #  The email address of the server corresponding to 
        self.mail = yagmail.SMTP(user, password, host, port)  # yagmail Library initialization instance 
        # In order to ensure the security and portability of program code , In the same directory as the program , Open profile （ Open manually or programmatically ）, Fill in the configuration information 
    def creatconfig(self):# The method of restoring to the default configuration file 
        self.config['DEFAULT'] = {
    'user': 'user',
                             'password': 'password',
                             'port': 'port',
                             'host': 'hosts'
                             }
        with open('MailConfig.ini', 'w+') as configfile:# Write to the default configuration file , Quite restore factory settings ！
            self.config.write(configfile)

    def openconfig(self):# Method of automatically opening configuration file on program 
        os.startfile('MailConfig.ini')

（2）MAILGUI.py

The MAILGUI.py file （ Is the main program ） The main place MAILGUI class ,MAILGUI Class is mainly GUI Write classes and import and use the previous MAIL Class method .

from tkinter import * #tkinter Compiling GUI Program 
from PIL import Image,ImageTk # Because we set the window picture background , So introduce pil library , The corresponding common library name is Pillow  library 
from MAIL import MAIL # Import required MAIL class 
import datetime # To get time 
import calendar # Used to generate a library in the form of calendar 
import tkinter.filedialog #tk The file selection box module in the library 
class MAILGUI(MAIL):# Inherited from MAIL class 
    def __init__(self):
        super().__init__()
        #  Main window settings 
        self.root = Tk()  #  Program main form 
        self.root.title(' be based on SMTP Mailbox program automatically sent by protocol ')  #  Set the window title 
        self.root.geometry('800x600+300+100')  #  Set the window size and position under the system display 
        self.root.iconbitmap('mail.ico')  #  Set the form icon 
        self.lists=[''] # Because the first list element is displayed later , So the initial element is set to an empty string first 
        self.filename = '' # Initialize the attachment address variable 

        photo1=Image.open('background1.png')# The same as the picture file in the code file directory , For calendar background 
        self.background_image1 = ImageTk.PhotoImage(photo1.resize((500, 400)))

        # GUI Components 
        #  Recipient prompt label 
        to_label = Label(self.root, text=' The recipient ：', font=(' In black ', 13)).place(x=10, y=20)
        #  Recipient input box 
        self.to_text = Text(self.root, width=26, height=1.55, font=(' In black ', 13))
        self.to_text.place(x=90, y=20)

        #  Email subject tag 
        title_label = Label(self.root, text=' The theme ：', font=(' In black ', 13)).place(x=10, y=80)
        #  Mail subject input box 
        self.title_text = Text(self.root, width=26, height=1.55, font=(' In black ', 13))
        self.title_text.place(x=90, y=80)

        #  Email content prompt label 
        contents_label = Label(self.root, text=' Content ：', font=(' In black ', 13)).place(x=10, y=140)
        #  Mail content input box 
        self.content_text = Text(self.root, width=75, height=12, font=(' In black ', 13))
        self.content_text.place(x=90, y=140)

        # Mail attachment button 
        attachments_button = Button(self.root, text=' Attachment address ', font=(' In black ', 13), fg='white', bg='green', command=self.Attachments,width=10, height=2, relief=RAISED)
        attachments_button.place(x=30, y=370)
        # Email attachment prompt label 
        self.attachments_label=Label(self.root, text=' No files selected yet ', font=(' In black ', 9),width=80, height=3, fg='white', bg='green')
        self.attachments_label.place(x=180, y=370)


        # Mail send confirmation button 
        check_button = Button(self.root, text=' Confirm sending ', font=(' In black ', 13), fg='white', bg='green', command=self.Sendto, width=10,height=2, relief=RAISED).place(x=30, y=450)

        # Program status label 
        tip_label = Label(self.root, text=' Program status ：', font=(' In black ', 13)).place(x=10, y=530)

        #  The text content corresponds to the label of the operation prompt of the actual operation program 
        self.tipout_label = Label(self.root, text=' No operation yet ！', font=(' In black ', 13), bg='green', fg='white')
        self.tipout_label.place(x=120, y=530)

        #  Used for time display labels 
        self.time_label = Label(self.root, text='', font=(' In black ', 16), fg='green')
        self.time_label.place(x=340, y=85)

        self.menubar = Menu(self.root)  #  The main menu 
        self.menuout = Menu(self.root, tearoff=0)  #  Pop up menu , Clear the collection of function realization 
        self.root['menu'] = self.menubar  #  Set up the main menu 
        #  Add menu items ：
        self.menubar.add_command(label=" Initialize configuration file  ", command=self.creatconfig)# Initialize the menu option function of the configuration file 
        self.menubar.add_command(label="  Open profile  ", command=self.openconfig)# Open the menu option function of the configuration file 
        self.menubar.add_command(label="  draft  ", command=self.textbook)
        self.menubar.add_command(label="  The calendar  ", command=self.show_datetime)
        self.root.bind("<Button-3>", self.pops)  # <Button-3> For right-click Events , Used to trigger pop-up menus 
        self.menuout.add_command(label=' Empty the recipient window ', command=self.Clear_to)
        self.menuout.add_command(label=' Empty the theme window ', command=self.Clear_title)
        self.menuout.add_command(label=' Empty the content window ', command=self.Clear_content)
        self.menuout.add_command(label=' Empty attachment address ', command=self.Clear_attachments)
        self.menuout.add_command(label=' Clear all input windows ', command=self.message)
        self.root.mainloop()

    #  Attachment control function 
    def Attachments(self):
        self.filename = tkinter.filedialog.askopenfilename()  #  Select File... In the pop-up box , And get the string file address 
        if self.filename != '':  #  use filename Whether it is an empty string , If there is no choice , Just use the initial amount 
            self.tipout_label['text'] = ' You have selected the attachment file ！'
            self.attachments_label['text'] = ' The file you selected is ' + self.filename
        else:
            self.tipout_label['text'] = ' You have not selected any files !'
            self.attachments_label['text'] = ' You haven't selected any files yet !'

    #  The main function ： Process mail delivery 
    def Sendto(self):
        to = self.to_text.get('1.0', 'end')  #  Get relevant content 
        title = self.title_text.get('1.0', 'end')
        content = self.content_text.get('1.0', 'end')
        if self.filename == '':  #  according to filename Value to select whether to include attachments when sending 
            try:  #  It is important to check whether the mail is sent successfully ;
                self.mail.send(to, title, content)
                self.tipout_label['text'] = " Send successfully ！"
            except:
                self.message()
        elif self.filename != '':
            try:
                self.mail.send(to, title, content, self.filename)
                self.tipout_label['text'] = " Send successfully ！"
            except:
                self.message()

    def show_datetime(self):  #  utilize calendar The library displays the calendar window 
        winnew = Toplevel(self.root)  #  Top level form 
        winnew.title(' Calendar window ')
        winnew.geometry('500x400+700+50')
        winnew.iconbitmap('mail.ico')  #  Set window icons , Use the same 
        self.tipout_label['text'] = ' You opened the calendar window ！'  #  Operation change prompt , Basically, every module contains 
        date_time = datetime.datetime.today()
        year = date_time.year  #  Get current year 
        month = date_time.month  #  Get current month 
        calendar.setfirstweekday(firstweekday=6)  #  Set the initial day of the calendar （ The first day ）
        dates = calendar.month(year, month)  #  Get the string type of calendar 
        alldate = Label(winnew, text='', bg='green', fg='white', width=1000, height=600, font=(' In black ', 20),
                        image=self.background_image1, compound=CENTER)
        alldate.configure(text=dates)
        alldate.pack()

    def textbook(self):#  Draft operation window 
        text_win = Toplevel(self.root)
        text_win.title(' Draft window ')
        text_win.geometry('740x520+500+50')
        text_win.iconbitmap('mail.ico')
        self.tipout_label['text'] = ' You opened the draft window ！'
        self.draft_paper = Text(text_win, width=100, height=30)  #  This example is the function of draft box input and text display box 
        self.draft_paper.insert('1.0', self.lists[0])  #  Insert saved content , Quite a memory , The logic of saving function is realized 
        save_button = Button(text_win, text=' preservation ', command=self.saves, relief=RAISED, fg='white', bg='green', font=(' In black ', 14),
                             width=10, height=2).place(x=19, y=430)
        clear_button = Button(text_win, text=' Empty all content ', command=self.clears, relief=RAISED, fg='white', bg='green',
                              font=(' In black ', 14), width=16, height=2).place(x=150, y=430)
        self.draft_paper.place(x=19, y=18)

    def saves(self):# How to save the contents of the draft box 
        self.lists[0] = self.draft_paper.get(1.0, 'end')  #  Click the save button , Trigger to get the content of the text box , Can be saved at any time during the writing process , Avoid losing 
        self.tipout_label['text'] = " You saved the contents of the draft box ！"

    def clears(self):# How to empty the contents of the draft box 
        self.draft_paper.delete('1.0', 'end')
        self.tipout_label['text'] = " You emptied the contents of the draft box ！"

    #  Used for error message prompt in other modules , Call when using 
    def message(self):
        self.tipout_label['text'] = " The input is incorrect or has been completely cleared ！ Please re-enter everything ！"
        self.to_text.delete('1.0', 'end')  #  The position of the first character in the text box control is  1.0, You can use numbers  1.0  Or a string "1.0" To express 
        self.title_text.delete('1.0', 'end')
        self.content_text.delete('1.0', 'end')
        self.filename=''
        self.tipout_label['text']=' You cleared all the entries ！ Including the addressee , The theme , Content , All input of attachment address ！'
        self.attachments_label['text']=' You haven't selected any files yet !'

    def pops(self,event):  #  Right click the response function , Pop up menu 
        self.menuout.post(event.x_root, event.y_root)  #  These two variables can pop up at any trigger part of the window 

    def Clear_to(self):  #  Empty recipient input box function 
        self.to_text.delete('1.0', 'end')
        self.tipout_label['text'] = ' You cleared the recipient window ！'

    def Clear_title(self):  #  How to clear the email subject input box 
        self.title_text.delete('1.0', 'end')
        self.tipout_label['text'] = ' You empty the theme window ！'

    def Clear_content(self):  #  How to empty the email content input box 
        self.content_text.delete('1.0', 'end')
        self.tipout_label['text'] = ' You empty the content window ！'

    def Clear_attachments(self):
        self.filename=''
        self.tipout_label['text'] = ' You cleared the attachment address ！'
        self.attachments_label['text'] = ' You haven't selected any files yet !'


if __name__ == '__main__':
    MAILGUI()

2. Problems encountered in development

pyinstaller Package multiple py Document and removal cmd Black box
Report errors ：ModuleNotFoundError: No module named 'PIL’ resolvent
python Get current year and month
Python in tkinter.filedialog
Python-Tkinter Graphical interface design （ Detailed tutorial ）
use tkinter.pack Design complex interface layout
python- be based on yagmail Library to develop automatic mail sending program

3、 ... and , Program packaging

1. Packaging process

(1) Find the directory of your code files , Copy down

（2） open cmd window , Copy the copied directory to cmd window , And add cd, As shown in the following example ：

（3） Make sure you have downloaded and installed pyinstaller, Enter the following command ：

pyinstaller -F < Program master file >.py

(4) In the generated file , Only keep < The main program >.spec file , Delete the rest （ Of course, our original py The code files are also in this directory , Definitely don't delete , Just keep it ）！ as follows ：

（5） Open suffix is .spec file , stay Analysis A list of the first line in , Then add the dependencies of our main program and the modules to be imported MAIL.py The string form of the file , Here's the picture ：

（6） Open it again cmd, Enter file directory , Enter the following command ：
The program does not carry a small black box , So add... After the command –noconsole sentence

pyinstaller -F  < Main program name >.spec --noconsole

（7） Prompt after successful packaging , We can delete the generated _pycache_ and build file , Only keep dist Folder , Because there is a generator exe Program , In addition, the program form needs to use mail.ico file , By default, packaging will not move it to dist The folder , We want to copy to dist Under the document ！

（8） Modify the configuration file , as follows ：

2. Program function display and description

The interfaces of the program are as follows ：

Four , Finished program download

In order to better learn and share the content of this part , And provide the finished product program for everyone to directly observe , Specially put the resource link here , For all readers to download ！
Mail delivery GUI Program download
If you have conditions , You can come to my Github Look at my project file and code , Attached below GitHub Project address ：
Python-tool-development-pip-instruction-GUI-program
Last , Due to the lack of development experience and some defects in the program , I hope you understand ！
Any questions about the content of the text , Welcome criticism and correction ！！！