Python: Conditionals for optional function arguments -

let's have function accepts 3 optional arguments:

def function(arg1=0, arg2=0, arg3=0) 

what cleanest way handle conditionals within function depending on argument passed?

right have is:

def function(arg1=0, arg2=0, arg3=0)     if arg1 !=0 , arg2 !=0 , arg3 != 0:         # stuff 3 args     elif arg1 !=0 , arg2 != 0:         # stuff arg1 , arg2, etc... 

to expand upon this, if function can take 5 arguments? doing conditionals possible combinations seems drag. can not else check arguments have been passed function?

update: based on feedback guess i'll explain in real terms i'm doing. need estimate someone's age based on when graduated school (high school, college, graduate program, etc). may have multiple years go on, , in fact may have multiple years each of high school, college, etc.

so, example might be:

def approx_age(highschool=0, college=0):     this_year = date.today().year     if (highschool != 0) , (college != 0):         hs_age = (this_year - highschool) + 18         college_age = (this_year - college) + 21         age_diff = abs(hs_age - college_age)         if age_diff == 0:             return hs_age         elif return (hs_age + college_age)/2     elif highschool != 0:         hs_age = (this_year - highschool) + 18         return hs_age     elif college != 0:         college_age = (this_year - college) + 21         return college_age 

things going more complicated here...

why check argumnet value 0 , use of elif pythonic. conditional statement check statement truth value if true condition proceed else switch next condition.

and

in [112]: bool(0) out[112]: false  in [113]: bool(none) out[113]: false 

so if argument value 0 don't need match 0 python selfly illustrate it.

def function(arg1=0, arg2=0, arg3=0)     if arg1 , arg2 , arg3:         # stuff 3 args      elif arg1 , arg2:         # stuff arg1 , arg2, etc...     ..     ..      else:         #do 

or none too:

def function(arg1=none, arg2=none, arg3=none)         if arg1 , arg2 , arg3:             # stuff 3 args