recursion for lists

[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.