recursion for lists

[lavanya]

my question here
Hello everyone,
I have a multi dimensional list with 4 parameters
array1 = [[array_size,full_type,child={},size],
[array_size,full_type,child1={},size],....]
where child,child1 are again lists contains [array_size,full_type,child={},size],
[array_size,full_type,child={},size]...

I have to go through this recursively until I get no child at each layer.
Any help is hightly appreciated. Thank you

my code here

[ichabod801]

Please show us the code you have so far, and explain the problem you are having with it (including the full error message if there is one).

[hbknjr]

There are few ways to do it. If you are aware of depth at which the lists are nested you can use * operator to unpack list.

Else you can do it via recursion.
eg-

myList = [1,[["powers","of","2"],2,4,8,16,32,64],2,[["powers","of","3"],3,9,27,81,243]]

def recur_print_list(iterable):
	for i in iterable:
		#if hasattr(i,'__iter__') and not isinstance(i, str): # checks if i is iterable and not string
		#if isinstance(i, collections.Iterable) and not isinstance(i, str):

		if type(i)==type([]):
			recur_print_list(i)
		else:
			print(i)

recur_print_list(myList)

The two commented if statements do the same work.

Another way is to use exception handling.

myList = [1,[["powers","of","2"],2,4,8,16,32,64],2,[["powers","of","3"],3,9,27,81,243]]

def recur_print_list(iterable):
	try:
		if isinstance(iterable, str): #Since strings are iterable in python3
			raise TypeError
		for i in iterable:
			recur_print_list(i)
	except TypeError:
			print(iterable)
recur_print_list(myList)

Since the strings in python3 are iterable you have to take care of that.