At Tuesday 25/7/2006 20:21, Jesper Steen Steffensen wrote:
I have a table with a list of values. To list my values in a dtml
method i write dtml-var value inside the appropriate dtml-in tag.
In the next column I have the dtml-var sequence-number
I want to accumulate my values so the result will be:
Is it possible to make this accumulated value as a
dtml-var expr=[something like sum of values where seq-num =seq-num]
Write a simple python script. Input=original list of values.
Output=list of (value, accum). Iterate the result with dtml-in as before.
Can you pls explain it a bit more in detail - afraid I'm still a bit
new to Zope and dtml/python. What would the Script (Python) look like?
Thanks for your help! :-)
This is a pure programming exercise. You said:
VALUE SEQNUMBER
13 1
10 2
11 3
10 4
12 5
...
I want to accumulate my values so the result will be:
VALUE SEQNUMBER ACCU
13 1 56
10 2 43
11 3 33
10 4 22
12 5 12
So apparently you need to accumulate the *remaining* values. The
script would receive a list of values: [13,10,11,10,12] and return a
list of tuples [(13,56),(10,43),(11,33)...]
A pure python function would look like this:
def accumulate_remaining(values):
values = map(float, values) # make sure they are true numbers
result = []
for i in range(len(values)):
result.append((values[i], sum(values[i:])))
return result
To convert it to a Script (Python): create the script, name it as
the function, leave out the def line and put the body inside the
script, declare a single parameter values.
Then use dtml-in accumulate_remaining(your_list_of_values) and
inside it, dtml-var sequence-item[0] dtml-var
sequence-item[1] or something like that.
This has not been tested but should work. The dtml syntax may be
wrong, tough, I dont use dtml anymore.
Gabriel Genellina
Softlab SRL
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