On Wed, Jun 18, 2014 at 10:36 AM, <subhabangal...@gmail.com> wrote:
> The questions are,
> i) prev_f_sum = sum(f_prev[k]*a[k][st] for k in states)
> here f_prev is called,
> f_prev is assigned to f_curr ["f_prev = f_curr"]
> f_curr[st] is again being calculated as, ["f_curr[st] = e[st][x_i] *
> prev_f_sum"] which again calls "prev_f_sum"
> I am slightly confused which one would be first calculated and how to proceed
These things that you describe as "calls" are not calls. f_prev and
f_curr are data structures (in this case dicts), not functions.
Accessing "f_prev[k]" does not call f_prev or in any way cause
f_prev[k] to be computed; it just looks up what value is recorded in
the f_prev dict for the key k.
Python is an imperative language, not declarative. If you want to
know what order these things are calculated in, just follow the