Class: Torch::Inspector::Formatter

Inherits:
Object
  • Object
show all
Defined in:
lib/torch/inspector.rb

Instance Method Summary collapse

Constructor Details

#initialize(tensor) ⇒ Formatter

Returns a new instance of Formatter.



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# File 'lib/torch/inspector.rb', line 13

def initialize(tensor)
  @floating_dtype = tensor.floating_point?
  @complex_dtype = tensor.complex?
  @int_mode = true
  @sci_mode = false
  @max_width = 1

  tensor_view = Torch.no_grad { tensor.reshape(-1) }

  if !@floating_dtype
    tensor_view.each do |value|
      value_str = value.item.to_s
      @max_width = [@max_width, value_str.length].max
    end
  else
    nonzero_finite_vals = Torch.masked_select(tensor_view, Torch.isfinite(tensor_view) & tensor_view.ne(0))

    # no valid number, do nothing
    return if nonzero_finite_vals.numel == 0

    # Convert to double for easy calculation. HalfTensor overflows with 1e8, and there's no div() on CPU.
    nonzero_finite_abs = nonzero_finite_vals.abs.double
    nonzero_finite_min = nonzero_finite_abs.min.double
    nonzero_finite_max = nonzero_finite_abs.max.double

    nonzero_finite_vals.each do |value|
      if value.item != value.item.ceil
        @int_mode = false
        break
      end
    end

    if @int_mode
      # in int_mode for floats, all numbers are integers, and we append a decimal to nonfinites
      # to indicate that the tensor is of floating type. add 1 to the len to account for this.
      if nonzero_finite_max / nonzero_finite_min > 1000.0 || nonzero_finite_max > 1.0e8
        @sci_mode = true
        nonzero_finite_vals.each do |value|
          value_str = "%.#{PRINT_OPTS[:precision]}e" % value.item
          @max_width = [@max_width, value_str.length].max
        end
      else
        nonzero_finite_vals.each do |value|
          value_str = "%.0f" % value.item
          @max_width = [@max_width, value_str.length + 1].max
        end
      end
    else
      # Check if scientific representation should be used.
      if nonzero_finite_max / nonzero_finite_min > 1000.0 || nonzero_finite_max > 1.0e8 || nonzero_finite_min < 1.0e-4
        @sci_mode = true
        nonzero_finite_vals.each do |value|
          value_str = "%.#{PRINT_OPTS[:precision]}e" % value.item
          @max_width = [@max_width, value_str.length].max
        end
      else
        nonzero_finite_vals.each do |value|
          value_str = "%.#{PRINT_OPTS[:precision]}f" % value.item
          @max_width = [@max_width, value_str.length].max
        end
      end
    end
  end

  @sci_mode = PRINT_OPTS[:sci_mode] unless PRINT_OPTS[:sci_mode].nil?
end

Instance Method Details

#format(value) ⇒ Object 



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# File 'lib/torch/inspector.rb', line 84

def format(value)
  value = value.item

  if @floating_dtype
    if @sci_mode
      ret = "%#{@max_width}.#{PRINT_OPTS[:precision]}e" % value
    elsif @int_mode
      ret = String.new("%.0f" % value)
      unless value.infinite? || value.nan?
        ret += "."
      end
    else
      ret = "%.#{PRINT_OPTS[:precision]}f" % value
    end
  elsif @complex_dtype
    # TODO use float formatter for each part
    precision = PRINT_OPTS[:precision]
    imag = value.imag
    sign = imag >= 0 ? "+" : "-"
    ret = "%.#{precision}f#{sign}%.#{precision}fi" % [value.real, value.imag.abs]
  else
    ret = value.to_s
  end
  # Ruby throws error when negative, Python doesn't
  " " * [@max_width - ret.size, 0].max + ret
end

#width ⇒ Object 



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# File 'lib/torch/inspector.rb', line 80

def width
  @max_width
end