Print labels with Dymo LabelWriter 450 using Python

my.label

<?xml version="1.0" encoding="utf-8"?>
<DieCutLabel Version="8.0" Units="twips">
	<PaperOrientation>Portrait</PaperOrientation>
	<Id>Small30332</Id>
	<PaperName>30332 1 in x 1 in</PaperName>
	<DrawCommands>
		<RoundRectangle X="0" Y="0" Width="1440" Height="1440" Rx="180" Ry="180" />
	</DrawCommands>
	<ObjectInfo>
		<TextObject>
			<Name>TEXT1</Name>
			<ForeColor Alpha="255" Red="0" Green="0" Blue="0" />
			<BackColor Alpha="0" Red="255" Green="255" Blue="255" />
			<LinkedObjectName></LinkedObjectName>
			<Rotation>Rotation0</Rotation>
			<IsMirrored>False</IsMirrored>
			<IsVariable>True</IsVariable>
			<HorizontalAlignment>Center</HorizontalAlignment>
			<VerticalAlignment>Top</VerticalAlignment>
			<TextFitMode>ShrinkToFit</TextFitMode>
			<UseFullFontHeight>True</UseFullFontHeight>
			<Verticalized>False</Verticalized>
			<StyledText>
				<Element>
					<String>Today</String>
					<Attributes>
						<Font Family="Arial" Size="16" Bold="False" Italic="False" Underline="False" Strikeout="False" />
						<ForeColor Alpha="255" Red="0" Green="0" Blue="0" />
					</Attributes>
				</Element>
			</StyledText>
		</TextObject>
		<Bounds X="82" Y="150" Width="1301" Height="195" />
	</ObjectInfo>
	<ObjectInfo>
		<TextObject>
			<Name>TEXT2</Name>
			<ForeColor Alpha="255" Red="0" Green="0" Blue="0" />
			<BackColor Alpha="0" Red="255" Green="255" Blue="255" />
			<LinkedObjectName></LinkedObjectName>
			<Rotation>Rotation0</Rotation>
			<IsMirrored>False</IsMirrored>
			<IsVariable>True</IsVariable>
			<HorizontalAlignment>Center</HorizontalAlignment>
			<VerticalAlignment>Top</VerticalAlignment>
			<TextFitMode>ShrinkToFit</TextFitMode>
			<UseFullFontHeight>True</UseFullFontHeight>
			<Verticalized>False</Verticalized>
			<StyledText>
				<Element>
					<String>START_DATE</String>
					<Attributes>
						<Font Family="Arial" Size="18" Bold="False" Italic="False" Underline="False" Strikeout="False" />
						<ForeColor Alpha="255" Red="0" Green="0" Blue="0" />
					</Attributes>
				</Element>
			</StyledText>
		</TextObject>
		<Bounds X="82" Y="375" Width="1301" Height="360" />
	</ObjectInfo>
	<ObjectInfo>
		<TextObject>
			<Name>TEXT3</Name>
			<ForeColor Alpha="255" Red="0" Green="0" Blue="0" />
			<BackColor Alpha="0" Red="255" Green="255" Blue="255" />
			<LinkedObjectName></LinkedObjectName>
			<Rotation>Rotation0</Rotation>
			<IsMirrored>False</IsMirrored>
			<IsVariable>False</IsVariable>
			<HorizontalAlignment>Left</HorizontalAlignment>
			<VerticalAlignment>Top</VerticalAlignment>
			<TextFitMode>ShrinkToFit</TextFitMode>
			<UseFullFontHeight>True</UseFullFontHeight>
			<Verticalized>False</Verticalized>
			<StyledText>
				<Element>
					<String>Next month</String>
					<Attributes>
						<Font Family="Arial" Size="16" Bold="False" Italic="False" Underline="False" Strikeout="False" />
						<ForeColor Alpha="255" Red="0" Green="0" Blue="0" />
					</Attributes>
				</Element>
			</StyledText>
		</TextObject>
		<Bounds X="82" Y="757.5" Width="1301" Height="172.5" />
	</ObjectInfo>
	<ObjectInfo>
		<TextObject>
			<Name>TEXT4</Name>
			<ForeColor Alpha="255" Red="0" Green="0" Blue="0" />
			<BackColor Alpha="0" Red="255" Green="255" Blue="255" />
			<LinkedObjectName></LinkedObjectName>
			<Rotation>Rotation0</Rotation>
			<IsMirrored>False</IsMirrored>
			<IsVariable>False</IsVariable>
			<HorizontalAlignment>Left</HorizontalAlignment>
			<VerticalAlignment>Top</VerticalAlignment>
			<TextFitMode>ShrinkToFit</TextFitMode>
			<UseFullFontHeight>True</UseFullFontHeight>
			<Verticalized>False</Verticalized>
			<StyledText>
				<Element>
					<String>END_DATE</String>
					<Attributes>
						<Font Family="Arial" Size="18" Bold="False" Italic="False" Underline="False" Strikeout="False" />
						<ForeColor Alpha="255" Red="0" Green="0" Blue="0" />
					</Attributes>
				</Element>
			</StyledText>
		</TextObject>
		<Bounds X="82" Y="1009" Width="1301" Height="345" />
	</ObjectInfo>
</DieCutLabel>

print.py

#!/usr/bin/env python

import sys
from os import path
from datetime import datetime, timedelta
from win32com.client import Dispatch
from tkinter import Tk
import tkinter.messagebox as mbox

curdir = None
if getattr(sys, 'frozen', False):
	# frozen
	curdir = path.dirname(sys.executable)
else:
	# unfrozen
	curdir = path.dirname(path.abspath(__file__))

mylabel = path.join(curdir,'my.label')
window = Tk()
window.wm_withdraw()

if not path.isfile(mylabel):
	mbox.showinfo('PyDymoLabel','Template file my.label does not exist')
	sys.exit(1)

try:
	now = datetime.now()
	next = now + timedelta(30)

	labelCom = Dispatch('Dymo.DymoAddIn')
	labelText = Dispatch('Dymo.DymoLabels')
	isOpen = labelCom.Open(mylabel)
	selectPrinter = 'DYMO LabelWriter 450'
	labelCom.SelectPrinter(selectPrinter)

	labelText.SetField('TEXT1', now.strftime('%Y/%m/%d'))
	labelText.SetField('TEXT2', next.strftime('%Y/%m/%d'))

	labelCom.StartPrintJob()
	labelCom.Print(1,False)
	labelCom.EndPrintJob()
except:
	mbox.showinfo('PyDymoLabel','An error occurred during printing.')
	sys.exit(1)

mbox.showinfo('PyDymoLabel','Label printed!')
sys.exit(0)

Hi, thank you for sharing the code! It seems python can't find the proper SDK and I keep getting the bad dispatch error. Installing the SDK v.8 seems to only install samples. I've installed the connect software and it works just fine. Do I need to add some folder to the user env variables on windows?

Did you happen to figure anything out @chuckedfromspace ? Experiencing the same issue..

Unfortunately no. I gave up and switched to using DYMO's Javascript framework.