I have these func that we can use right and i can use it to get some data, and id like to know what can i do with them, if there is any guide 

# Available variables:

#----------------------

# payslip: hr.payslip object

# employee: hr.employee object

# contract: hr.contract object

# rules: dict containing the rules code (previously computed)

# categories: dict containing the computed salary rule categories (sum of amount of all rules belonging to that category).

# worked_days: dict containing the computed worked days

# inputs: dict containing the computed inputs.

# Note: returned value have to be set in the variable 'result'

for example i do something like this 
vacation_days_total = 0

for line in worked_days:

    # Check if the line is for vacation days by comparing the code

    if line['code'] == 'LEAVE120':

        vacation_days_total += line['number_of_days']

to get to total days of the leaves, but id like to know the day i took that leave, anyone can help?