Why does this Python Tkinter stopwatch script crash?
<p>I have this script I wrote as a timer, but it crashes whenever I press the start button. (Sorry, I'm very much so of a noob)
<a href="http://pastebin.com/BWDaRTYv" rel="nofollow">http://pastebin.com/BWDaRTYv</a>
Thanks, Sam</p>

<p>I can't see your code but I am willing to bet that you are using time.sleep to delay your time. DONT. Use the Tkinter .after method to schedule a function to be called periodically to update your timer.</p>

<p><a href="http://effbot.org/tkinterbook/widget.htm" rel="nofollow">See here</a> or <a href="http://stackoverflow.com/questions/25753632/tkinter-how-to-use-after-method">here</a></p>

python button timer tkinter crash