Is there a simple way to check if a multilevel key exists in a Python3 dict?

Question

I want to do something like

if 'key' in dictionary:

but check multiple nested keys at once

if ['key_parent']['key_child']['key_grandchild'] in dictionary:

is this possible?

Answer 1

I'm afraid there isn't. The way to do it would be with try...except, like this:

try:
    value = dictionary['key_parent']['key_child']['key_grandchild']
except KeyError:
    # no key

or multiple nested if:

value = None
if 'key_parent' in dictionary:
    if 'key_child' in dictionary['key_parent']:
        if 'key_grandchild' in dictionary['key_parent']['key_child']:
            value = dictionary['key_parent']['key_child']['key_grandchild']