original_docstring: Returns a combined TH1 object from a collection of histograms with bin
      errors calculated.
  
      Args:
          histograms_or_stack: A single histogram, a non-empty iterable of
              histograms, or a THStack object which represents the collection of
              histograms
  
      Returns:
          A single TH1 object which is a combination of the provided histograms
          and which has bin errors calculated.
      
docstring: Returns a combined TH1 object from a collection of histograms with bin
  errors calculated.
docstring_tokens: Returns a combined TH1 object from a collection of histograms with bin errors calculated .
code: def combined_histogram(histograms_or_stack):
      """Returns a combined TH1 object from a collection of histograms with bin
      errors calculated.
  
      Args:
          histograms_or_stack: A single histogram, a non-empty iterable of
              histograms, or a THStack object which represents the collection of
              histograms
  
      Returns:
          A single TH1 object which is a combination of the provided histograms
          and which has bin errors calculated.
      """
      # Convert the histograms to an iterable, always unpacking THStack objects
      histograms = drawable_iterable(histograms_or_stack, True)
  
      # Grab the first histogram, making sure bin errors are calculated before
      # adding the remaining histograms
      result = histograms[0].Clone(_rand_uuid())
      SetOwnership(result, False)
      if result.GetSumw2N() == 0:
          result.Sumw2()
  
      # Add the other histograms to the result
      map(result.Add, histograms[1:])
  
      return result
code_tokens: def combined_histogram ( histograms_or_stack ) : histograms = drawable_iterable ( histograms_or_stack , True ) result = histograms [ 0 ] . Clone ( _rand_uuid ( ) ) SetOwnership ( result , False ) if result . GetSumw2N ( ) == 0 : result . Sumw2 ( ) map ( result . Add , histograms [ 1 : ] ) return result
short_docstring: Returns a combined TH1 object from a collection of histograms with bin
  errors calculated.
short_docstring_tokens: Returns a combined TH1 object from a collection of histograms with bin errors calculated .
comment: """Returns a combined TH1 object from a collection of histograms with bin
      errors calculated.
  
      Args:
          histograms_or_stack: A single histogram, a non-empty iterable of
              histograms, or a THStack object which represents the collection of
              histograms
  
      Returns:
          A single TH1 object which is a combination of the provided histograms
          and which has bin errors calculated.
      """$SEP$# Convert the histograms to an iterable, always unpacking THStack objects$SEP$# Grab the first histogram, making sure bin errors are calculated before$SEP$# adding the remaining histograms$SEP$# Add the other histograms to the result