data.py

def check_mail(mail):#check the email  if there is in file 
	there_is_mail=False	# when we start the research do not know if the email there is in the file txt
	with open('mails.txt') as f:# open the file as "f"
		if mail in f.read():# checking for  email 
			there_is_mail=True #is means we found the email
		elif mail not in f.read():#checking if the email is different if yes them 
			there_is_mail=False# we did not found the email 
	return there_is_mail# return if the email there is here or not 
	#I would like to thank the following site for the help it provides me
	# # https://www.codegrepper.com/search.php?q=how%20to%20find%20string%20in%20text%20file%20using%20python
	
def write_mail(mail):#check if email these is in file and them w
	there_is_mail=False#when we start the research do not know if the email there is in the file txt 
	file=open("mails.txt","r")#	name of the file ,the reason why we need to open. r is means read 
	with open('mails.txt') as f:# open the file as "f"
		if mail in f.read():#	checking for email
			there_is_mail=True# is means we found the email 
		#I would like to thank the following site for the help it provides me 
		# https://www.codegrepper.com/search.php?q=how%20to%20find%20string%20in%20text%20file%20using%20python
	file.close() #	close the file 
	if there_is_mail==False:#the emails there isn't in file txt 
		File = open("mails.txt", "a")#name of the file ,the reason why we need to open. a is means append 
		File.write(mail+"\n")#write emails in file txt and spece for next email 
		File.close()#	close the file 
		there_is_mail=True# is means we wrote the email
	return there_is_mail# return what happened to the email
	#I would like to thank the following site for the help it provides me 
	# https://www.codegrepper.com/search.php?q=write%20line%20in%20text%20file%20python
	
def delete_mail(mail):#delete the line with mail (delete the mail from database)
	with open("mails.txt", "r") as f:#first, open the file for reader to know what has inside
		lines = f.readlines()#read line by ine 
		with open("mails.txt", "w") as f:#name of the file ,the reason why we need to open. w is means write 
			for line in lines:# we prepare to write line by line 
				if line.strip("\n") != mail: #check if the email is different from the email we want to delete if yes then
					f.write(line)#write the email 
	#I would like to thank the following site for the help it provides me
	#  https://www.codegrepper.com/search.php?q=delete%20line%20in%20text%20file%20python
	
def read_the_data_base():#Using readlines()
	print("these are mails we have in the database:")
	file1 = open('mails.txt', 'r')#name of the file, the reason why we need to open. r is means read 
	Lines = file1.readlines() 
	count = 0
	for line in Lines:#print line by line  what did you read
		count += 1
		print(format( line.strip())) # printing 
	#I would like to thank the following site for the help it provides me
	#  https://www.geeksforgeeks.org/read-a-file-line-by-line-in-python/ (Example 3)

def sender(mail):
	import smtplib
	import ssl
	from printers import message
	server = smtplib.SMTP_SSL("smtp.gmail.com",465)#(server address,portal number  )
	server.login("tipotanothing@gmail.com" , "tipota1345")#(email,password )
	server.sendmail("tipotanothing@gmail.com",mail,message)#(the sender,the receiver,)
	#server.quit()
	#I would like to thank the following site for the help it provides me 
	#https://www.tutorialspoint.com/python/python_sending_email.htm