Question

I’m generating an HTML page via Python, using the Flask framework to receive messages and the requests module to send them. My python script has a global list variable called History, and when a button is clicked I want the python script to run the command History = [] (e.g. dump the contents of the list).

How do i achieve that? I generated the button with the following code :

s += '<input type="submit" value="Reset History">'
return s

But right now it does nothing.

Answer 1

Have the HTML page send a value using either POST or GET, which is then picked up by a cgi form in Python, converted to integer, and

<input type="submit" name="reset_hist" />

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if(reset_hist):
    History = []

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Or you could use AJAX to send the request, instead of loading a new page. see xmlHttpRequest()