original_docstring: Insert new element x in the heap.
             Assumption: x is not already in the heap
docstring: Insert new element x in the heap.
  Assumption: x is not already in the heap
docstring_tokens: Insert new element x in the heap . Assumption : x is not already in the heap
code: def push(self, x):
          """Insert new element x in the heap.
             Assumption: x is not already in the heap"""
          assert x not in self.rank
          i = len(self.heap)
          self.heap.append(x)    # add a new leaf
          self.rank[x] = i
          self.up(i)             # maintain heap order
code_tokens: def push ( self , x ) : assert x not in self . rank i = len ( self . heap ) self . heap . append ( x ) self . rank [ x ] = i self . up ( i )
short_docstring: Insert new element x in the heap.
short_docstring_tokens: Insert new element x in the heap .
comment: """Insert new element x in the heap.
             Assumption: x is not already in the heap"""$SEP$# add a new leaf$SEP$# maintain heap order