fix dependency error with win10toast (specific to windows)

knockknock/desktop_sender.py

@@ -5,7 +5,6 @@ import functools
 import socket
 import subprocess
 import platform
-from win10toast import ToastNotifier
 
 DATE_FORMAT = "%Y-%m-%d %H:%M:%S"
 
@@ -20,6 +19,11 @@ def desktop_sender(title: str = "knockknock"):
             subprocess.run(["notify-send", title, text])
         
         elif platform.system() == "Windows":
+            try:
+                from win10toast import ToastNotifier
+            except ImportError as err:
+                print('Error: to use Windows Desktop Notifications, you need to install `win10toast` first. Please run `pip install win10toast==0.9`.')
+
             toaster = ToastNotifier()
             toaster.show_toast(title,
                                text,

setup.py

@@ -3,7 +3,7 @@ from io import open
 
 setup(
     name='knockknock',
-    version='0.1.8',
+    version='0.1.8.1',
     description='Be notified when your training is complete with only two additional lines of code',
     long_description=open('README.md', 'r', encoding='utf-8').read(),
     long_description_content_type='text/markdown',
@@ -26,7 +26,6 @@ setup(
         'python-telegram-bot',
         'requests',
         'twilio',
-        'win10toast==0.9'
     ],
     classifiers=[
         'Intended Audience :: Science/Research',