203-Remove-Linked-List-Elements.py

# Definition for singly-linked list.
# class ListNode(object):
#     def __init__(self, val=0, next=None):
#         self.val = val
#         self.next = next
class Solution(object):
    def removeElements(self, head, val):
        """
        :type head: ListNode
        :type val: int
        :rtype: ListNode
        """
        while head and head.val == val:
            head = head.next
        curr = head
        while curr and curr.next:
            if curr.next.val==val:
                curr.next=curr.next.next
            else:
                curr=curr.next
        return head