I need a python function to extract an element from array of arbitrary depth -


i need process elements in array in python function - want assign default value if element doesn't exist. element processed may of arbitrary depth in array. ie, need this:

x=myfunc(myarray,"element","here")

but it's this:

x=myfunc(myarray,"deeper","element","here")

or even

x=myfunc(myarray,"even","deeper""element","here")

so achieve i've written terribly inefficient function myfunc

def myfunc(mydict,*args):     if len(args) == 2 :         try:             returnvalue=mydict[args[0]][args[1]]         except keyerror:             returnvalue="some default value"     elif len(args) == 3 :         try:             returnvalue=mydict[args[0]][args[1]][args[2]]         except keyerror:             returnvalue="some default value"     elif len(args) == 4 :         try:             returnvalue=mydict[args[0]][args[1]][args[2]][args[3]]         except keyerror:             returnvalue="some default value"     return returnvalue

yes, know could assign value directly x , put except keyerror: around assignments, of course i've stripped example down simplify it.

i know there has better way of extracting element array of arbitrary depth - if change args ("list","of","elements") ["list"]["of"]["elements"] think i'd have it.

any ideas?

here's sample test using above:

def main():     mydict = {       "first": {         "second1": "2",         "second2": "22",         "deeper": {           "third1": "3",           "third2": "33"         }       }     }      x=myfunc(mydict,"first","second1")     print "x should 2. , x is...",x     x=myfunc(mydict,"first","deeper","third2")     print "x should 33. , x is...",x     x=myfunc(mydict,"first","hopefullygetdefaultreturned")     print "x should 'some default value'.  , x is...",x   main()

a loop:

def get_by_path(value, *path):     key in path:         value = value[key]      return value

with default:

def get_or_default(value, default, *path):     try:         return get_by_path(value, *path)     except keyerror:         return default

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