Hurry! Write an interface to find the number of descendants of a particular element Linux in the dictionary structure?

< H2 > question < / H2 >

write an interface to find the number of descendants of a specific element Linux in the dictionary structure data
[recursion should be used, known result should be 7] 

unix_tree = {
            "Unix": {
                "PWB/Unix": {
                    "System III": {
                        "HP-UX": None
                    },
                    "System V": {
                        "UnixWare": None,
                        "Solaris": {
                            "OpenSolaris": None
                        }
                    }
                },
                "BSD": {
                    "Unix 9": None,
                    "FreeBSD": None,
                    "NetBSD": None,
                    "MacOS": None
                },
                "Xenix": {
                    "Sco Unix": {
                        "OpenServer": None
                    },
                    "AIX": None,
                },
            },
            "Linux": {
                "Debian": {
                    "Ubuntu": None,
                    "Linux Mint": None
                },
                "Redhat": {
                    "CentOS": None,
                    "Fedora": None
                },
                "Gentoo": None
            }
        }


def count_of_all_distributions_of_linux(unix_tree):
    pass

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what result do you expect? What is the error message actually seen?

Python
Apr.03,2021

use the recursive method. It's very short. Look at

. 
def get_dictkeys(dic):
    key_sum = 0
    for key in dic.keys():
        key_sum = key_sum+1
        if isinstance(dic[key], dict):
            key_sum = key_sum+get_dictkeys(dic[key])
    return key_sum
print get_dictkeys(unix_tree["Linux"])

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Message : Disk full (/tmp/#sql-temptable-64f5-1b37fd2-2c0cd.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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