How do I use text inputted into my kivy GUI as a string to use elsewhere? - python-3.x

Question

I have created a very simple GUI in kivy and am trying to use it to send an e-mail to a specific user, how do I use the text inputted into the GUI as I am unfamiliar with GUI.
This is my code so far below:
import textwrap
import time
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.widget import Widget
from kivy.uix.gridlayout import GridLayout
from kivy.uix.textinput import TextInput
class Main(GridLayout):
def __init__(self,**kwargs):
super(Main, self).__init__(**kwargs)
self.cols = 2
self.add_widget(Label(text = "Who"))
self.Who = TextInput(multiline = True)
self.add_widget(self.Who)
self.add_widget(Label(text = "What"))
self.What = TextInput(multiline = True)
self.add_widget(self.What)
self.add_widget(Label(text = "Where"))
self.Where = TextInput(multiline = True)
self.add_widget(self.Where)
self.add_widget(Label(text = "When"))
self.When = TextInput(multiline = True)
self.add_widget(self.When)
self.add_widget(Label(text = "How"))
self.How = TextInput(multiline = True)
self.add_widget(self.How)
class AMAPP(App):
def build(self):
return Main()
def sendMail(FROM,TO,SUBJECT,TEXT,SERVER):
import smtplib
"""this is some test documentation in the function"""
message = textwrap.dedent("""\
From: %s
To: %s
Subject: %s
%s
""" % (FROM, ", ".join(TO), SUBJECT, TEXT))
# Send the mail
server = smtplib.SMTP(SERVER)
server.starttls()
server.login('E-mail', 'Password')
server.sendmail(FROM, TO, message)
server.quit()
FROM = 'me'
TO = 'you'
SUBJECT = 'test'
TEXT = (Who, What, Where, When, How)
SERVER = 'smtp.gmail.com'
sendMail(FROM,TO,SUBJECT,TEXT,SERVER)
if __name__ == "__main__":
AMAPP().run()
whenever I run this I get the same error:
line 66, in __init__
TEXT = (Who,What,Where,When,How)
NameError: name 'Who' is not defined

Answer 1

You have to give id to the Textinput widgets as you create them so that you can reference them to extract the text. Add a button so that you invoke the sendEmail method. Please refer to the example below for details.
Example
main.py
import textwrap
import time
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
FROM = 'me'
TO = 'you'
SUBJECT = 'test'
TEXT = ""
SERVER = 'smtp.gmail.com'
def sendMail(FROM, TO, SUBJECT, TEXT, SERVER):
import smtplib
"""this is some test documentation in the function"""
message = textwrap.dedent("""\
From: %s
To: %s
Subject: %s
%s
""" % (FROM, ", ".join(TO), SUBJECT, TEXT))
# Send the mail
server = smtplib.SMTP(SERVER, 587)
server.starttls()
server.login('E-mail', 'Password')
server.sendmail(FROM, TO, message)
server.quit()
class Main(BoxLayout):
def send_eMail(self):
global TEXT
print(self.ids.Who.text)
print(self.ids.What.text)
print(self.ids.Where.text)
print(self.ids.When.text)
print(self.ids.How.text)
TEXT = (self.ids.Who.text, self.ids.What.text,
self.ids.Where.text, self.ids.When.text, self.ids.How.text)
sendMail(FROM, TO, SUBJECT, TEXT, SERVER)
class AMAPP(App):
def build(self):
return Main()
if __name__ == "__main__":
AMAPP().run()
amapp.kv
#:kivy 1.10.0
<Main>:
orientation: "vertical"
GridLayout:
cols: 2
Label:
text: "Who"
TextInput:
id: Who
multiline: True
Label:
text: "What"
TextInput:
id: What
multiline: True
Label:
text: "Where"
TextInput:
id: Where
multiline: True
Label:
text: "When"
TextInput:
id: When
multiline: True
Label:
text: "How"
TextInput:
id: How
multiline: True
Button:
text: "Send Mail"
on_release: root.send_eMail()
Output

Answer 2

You were actually quite close with your code. Rather than doing a rewrite to kv code (which might be better practice), I simply added the button, fixed your dedent call, added the self.Field.text references, and it worked fine. Here's the edited code.
import textwrap
import time
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.widget import Widget
from kivy.uix.gridlayout import GridLayout
from kivy.uix.textinput import TextInput
from kivy.uix.button import Button # ADDED
EMAIL="<senders email address>" # ADDED
PASSWORD="<senders password>" # ADDED
class Main(GridLayout):
def __init__(self,**kwargs):
super(Main, self).__init__(**kwargs)
self.cols = 2
self.add_widget(Label(text = "Who"))
self.Who = TextInput(multiline = True)
self.add_widget(self.Who)
self.add_widget(Label(text = "What"))
self.What = TextInput(multiline = True)
self.add_widget(self.What)
self.add_widget(Label(text = "Where"))
self.Where = TextInput(multiline = True)
self.add_widget(self.Where)
self.add_widget(Label(text = "When"))
self.When = TextInput(multiline = True)
self.add_widget(self.When)
self.add_widget(Label(text = "How"))
self.How = TextInput(multiline = True)
self.add_widget(self.How)
self.add_widget(Button(text="Send",on_press=self.sendmail)) # ADDED
# ADDED function callable by the button press:
def sendmail(self,*args):
FROM = 'me'
TO = '<receivers email address>'
SUBJECT = 'test'
TEXT = '\n'.join([self.Who.text, self.What.text,
self.Where.text, self.When.text, self.How.text])
SERVER = 'smtp.gmail.com'
sendMail(FROM,[TO],SUBJECT,TEXT,SERVER) # watch out for the TO argument
class AMAPP(App):
def build(self):
return Main()
def sendMail(FROM,TO,SUBJECT,TEXT,SERVER):
import smtplib
"""this is some test documentation in the function"""
message = textwrap.dedent("""\
From: %s
To: %s
Subject: %s
%s
""") % (FROM, ", ".join(TO), SUBJECT, TEXT) # FIXED the dedent call
# Send the mail
server = smtplib.SMTP(SERVER)
server.starttls()
server.login(EMAIL,PASSWORD)
server.sendmail(FROM, TO, message)
server.quit()
if __name__ == "__main__":
AMAPP().run()
Warning, it is more involved if you want to send data TO the kivy GUI, because kivy has to know the data has changed. But that's beyond the scope of this question.