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 ）.

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 controllable , After comparison, the author found that python Of yagmail Library is a good choice , in addition , What we need to develop is product level （ Simple , Hee hee ）, Then you can't open the code at runtime , That would be troublesome , 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 .

3. Preparation

Summarize the previous , We need to be prepared and familiar with the following things ：
（1） Set up the server settings of the mailbox service provider , Prepare the corresponding service password （ Not the account login password ）;
（2）python Of yagmail library , Know how to use ;
（3） Make sure you bring your own tkinter The package exists （ Generally no problem ）, Know how to use ;
Because the author has made this introduction before , I won't go into details here , Here's a link ：
python- be based on yagmail Library to develop automatic mail sending program

4. Functional description

Two , Write code

1. Handler module

Be careful ： Privacy concerns in the code , Are shielded , The corresponding content should be introduced according to your actual situation

from tkinter import *  #tk Graphics library , One of the standard libraries 
from PIL import Image,ImageTk# Because we set the window picture background , So introduce 
import tkinter.filedialog#tk The file selection box module in the library 
import yagmail# Third party library sent by email 
import time# Used to display the time 
import datetime# Used to obtain and display calendar functions on the calendar 
import calendar
root = Tk()# Program main form 

# Set the global variables , In case of program recognition error 
global to, title, content,user, password, port, host

#yagmail Library basic parameter settings 
user = ''  #  Corresponding to your owner's mailbox 
password = ''   #  The service password corresponding to your email application , The above steps are introduced 
port = '465'  #  port 
host = 'smtp.163.com'  #  The email address of the server corresponding to 
mail = yagmail.SMTP(user, password, host, port)#yagmail Basic configuration of library 

# Control instance 
photo1=Image.open('background1.png')# The same as the picture file in the code file directory , For the background ,
background_image1 = ImageTk.PhotoImage(photo1.resize((500, 400)))
to_text = Text(root,width=26,height=1.55,font=(' In black ',13))# Recipient input box 
title_text = Text(root,width=26,height=1.55,font=(' In black ',13))# Mail subject input box 
content_text = Text(root,width=75,height=12,font=(' In black ',13))# Mail content input box 
tipout_label = Label(root,text=' No operation yet ！',font=(' In black ',13),bg='green',fg='white')# The text content corresponds to the operation prompt of the actual operation program 
time_label=Label(root,text='',font=(' In black ',16),fg='green')# For time display 
menubar=Menu(root)# The main menu 
menuout=Menu(root,tearoff=0)# Pop up menu , Clear the collection of function realization 
root['menu']=menubar# Set up the main menu 

def gettime():# utilize time Library function to get the current time 
    timestr = time.strftime("%Y year %m month %d Japan  %H when :%M branch :%S second ,%A")# Get and format the output time 
    time_label.configure(text=timestr)
    root.after(1000,gettime)# Every second （ Corresponding 1000） Refresh time 
gettime()# Call the time display function 

def show_datetime():# utilize calendar Library functions for displaying calendars 
    winnew=Toplevel(root)# Top level form 
    winnew.title(' Calendar window ')
    winnew.geometry('500x400+700+50')
    winnew.iconbitmap('mail.ico')# Set window icons , Use the same 
    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=background_image1,compound = CENTER)
    alldate.configure(text=dates)
    alldate.pack()

global lists,textbooks# Label global variables , Under the main form frame logic , You can still have memory function when closing the window , So as to realize the saving function 
textbooks=Label(root,text=' nothing ')
lists=['']# Because the first list element is displayed later , So the initial element is set to an empty string first 
def textbook():
    text_win=Toplevel(root)
    text_win.title(' Draft window ')
    text_win.geometry('740x520+500+50')
    text_win.iconbitmap('mail.ico')
    tipout_label['text'] = ' You opened the draft window ！'
    draft_paper=Text(text_win,width=100,height=30)# This example is the function of draft box input and text display box 
    draft_paper.insert('1.0', lists[0])# Insert saved content , Quite a memory , The logic of saving function is realized 
    def saves():
        textbooks .configure(text=draft_paper.get(1.0, 'end'))
        lists[0]=textbooks['text']# 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 
        tipout_label['text'] = " You saved the contents of the draft box ！"
    def clears():
        draft_paper.delete('1.0', 'end')
        tipout_label['text'] = " You emptied the contents of the draft box ！"
    save_button = Button(text_win, text=' preservation ', command=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=clears,relief=RAISED,fg='white',bg='green',font=(' In black ',14),width=16,height=2).place(x=150,y=430)
    draft_paper.place(x=19,y=18)

# Add menu items ：
menubar.add_command(label = "  draft  ", command=textbook)
menubar.add_command(label = "  The calendar  ", command=show_datetime)

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

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

def Clear_title():# Empty the mail subject input box function 
    title_text.delete('1.0', 'end')
    tipout_label['text'] =' You empty the theme window ！'

def Clear_content():# Empty mail content input box function 
    content_text.delete('1.0', 'end')
    tipout_label['text'] =' You empty the content window ！'

# Used for error message prompt in other modules , Call when using 
def message():
    tipout_label['text'] = " The input is incorrect or has been completely cleared ！ Please re-enter everything ！"
    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 
    title_text.delete('1.0', 'end')
    content_text.delete('1.0', 'end')

filename=''# File address variable , Initialize first 
# Attachment control function 
def Attachments():
    global filename# Within the function , Global variables need to be declared , Available Sendto Use 
    filename = tkinter.filedialog.askopenfilename()# Select File... In the pop-up box , And get the string file address 
    if filename != '':# use filename Whether it is an empty string , Whether the file attachment function and identification are relevant 
        tipout_label['text']=' The file you selected is ' + filename
    else:
        tipout_label['text']=' You have not selected any files '

# The main function ： Process mail delivery 
def Sendto():
    to = to_text.get('1.0', 'end')# Get relevant content 
    title = title_text.get('1.0', 'end')
    content = content_text.get('1.0', 'end')
    if 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 ;
            mail.send(to, title, content)
            tipout_label['text'] = " Send successfully ！"
        except:
            message()
    elif filename !='':
        try:
            mail.send(to, title, content,filename)
            tipout_label['text'] = " Send successfully ！"
        except:
            message()

root.bind("<Button-3>",pops)#<Button-3> For right-click Events , Used to trigger pop-up menus 
menuout.add_command(label=' Empty the recipient window ',command=Clear_to)
menuout.add_command(label=' Empty the theme window ',command=Clear_title)
menuout.add_command(label=' Empty the content window ',command=Clear_content)
menuout.add_command(label=' Clear all input windows ',command=message)

# Control property settings 
to_label=Label(root,text=' The recipient ：',font=(' In black ',13)).place(x=10,y=20)# Recipient prompt label 
title_label=Label(root,text=' The theme ：',font=(' In black ',13)).place(x=10,y=80)# Theme Tags 
contents_label=Label(root,text=' Content ：',font=(' In black ',13)).place(x=10,y=140)# Content labels 
to_text.place(x=90,y=20)
title_text.place(x=90,y=80)
content_text.place(x=90,y=140)
attachments_button=Button(root,text=' Attachment address ',font=(' In black ',13),fg='white',bg='green',command=Attachments,width=10,height=2,relief=RAISED)
attachments_button.place(x=30,y=370)
check_button=Button(root,text=' Confirm sending ',font=(' In black ',13),fg='white',bg='green',command=Sendto,width=10,height=2,relief=RAISED).place(x=30,y=450)
tip_label=Label(root,text=' Program status ：',font=(' In black ',13)).place(x=10,y=530)
tipout_label.place(x=120,y=530)
time_label.place(x=340,y=85)

# Main window settings 
root.title(' be based on SMTP Mailbox program automatically sent by protocol ')# Set the window title 
root.geometry('800x600+300+100')# Set the window size and position under the system display 
root.iconbitmap('mail.ico')# Set the form icon 
root.mainloop()

2. Operation effect display ：

3、 ... and , Program packaging

During this development , The third-party libraries used have been installed locally ,pycharm The virtual environment has also inherited ）, therefore pycharm And local PythonIDLE Can run and execute code .

1. Demonstration of program packaging steps ：

（1） Download and install first pyinstaller Install as follows ：
pyinstaller install
（2）Windows Open the command line ：

（3） Enter where you are py File directory ：
（4） After entering the catalog , Input ：pyinstaller -F -w -i < The full name of the file containing the file type name >

（5） stay py The following directory and other files will be generated under the same directory ：

（6） Get into dist file , We found that the package was finished exe Program , Because of our program exe It doesn't include the pictures used in it , The following errors will occur ：

（7） We have a solution , First, you should remove the image corresponding to the code and insert , Second, like the following , Copy or transfer the corresponding picture file to the same exe File directory , Open it again , The program runs successfully ：

2. Summary of problems encountered in development and solutions ：

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
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 ！！！