Question

Suppose we have two lists:

A = [2, 3, [6, 7], 0]
B = [4, 7, 10, 2]

I want to input those values to a function like this:

def gettype(self, a):
 for x in a:
    if isinstance(x, list):
     ident = True
    else:
     ident = False
  return ident 

That returns True if there are a list of lists or false otherwise.

ident = gettype(A)
print ident
True

ident = gettype(B)
print ident
False

PS: That function above doesn’t work, it’s returning False in both cases

Answer 1

Like

A = [2, 3, [6, 7], 0]
B = [4, 7, 10, 2]


def has_lists(lst):
    return any(isinstance(x, list) for x in lst)

print has_lists(A) # True
print has_lists(B) # False