Django: two buttons in the one form

There are two buttons in the one form:
<form ...>
...

<input type="submit" name=b1 value="Request">
<input type="submit" name=b2 value="Refresh">
</form>

code in views.py:
if request.GET.get$'b2',None$!=

None:
   $code for refresh form$
else:
   $code for request data$