code: def _remove_dups(L):
      """
      Remove duplicates AND preserve the original order of the elements.
  
      The set class is not guaranteed to do this.
      """
      seen_before = set([])
      L2 = []
      for i in L:
          if i not in seen_before:
              seen_before.add(i)
              L2.append(i)
      return L2
  
imports: import warnings
  import bisect
  from collections import deque
  import numpy
  from .None import _hierarchy, _optimal_leaf_ordering
  import scipy.spatial.distance
  from scipy._lib._disjoint_set import DisjointSet
label_desc: Use image node_id 34 for calling a global function with example usage: _remove_dups(L) and returns: L2