Python Runtime error unhashable type

  • 0

    I am working on the solution to "Copy List with Random Pointer" but believe I am stuck with copying for empty inputs.

    # Definition for singly-linked list with a random pointer.
    # class RandomListNode:
    #     def __init__(self, x):
    #         self.label = x
    # = None
    #         self.random = None

    My code has a runtime error presumably on these lines:

    def copyRandomList(self, head):
        myRandom = RandomListNode(head.label)if head is not None else dict()

    ... ...line #29 EOF

    Runtime Error Message: Line 60: TypeError: unhashable type: 'dict'
    Last executed input: {}

    What is being expected in the test-case ? Also what is the code running at line #60 in the test setup for evaluating this code.

  • 0

    Would you mind share code with some explanation? That may help people find out the reason.

  • 0

    The following code worked for me:

    if head is None: return None
        copy = RandomListNode(head.label)

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