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edited Apr 13, 2017 at 12:33

Germán Carrillo's Germán Carrillo's answer is the most convenient. A possible alternative (if you're stuck with QGIS 2.8) could be to:

Use a string which allows the user to enter the units they want to use:

  ##units=string mm

  if units == 'mm':
      # Do something
  elif units == 'cm':
      # Do something
  elif units == 'm':
      # Do something

Or use three boolean checkboxes:

  ##Millimeter=boolean
  ##Centimeter=boolean
  ##Meter=boolean

  if Millimeter == True:
      # Do something
  elif Centimeter == True:
      # Do something
  elif Meter == True:
      # Do something

Germán Carrillo's answer is the most convenient. A possible alternative (if you're stuck with QGIS 2.8) could be to:

Use a string which allows the user to enter the units they want to use:

  ##units=string mm

  if units == 'mm':
      # Do something
  elif units == 'cm':
      # Do something
  elif units == 'm':
      # Do something

Or use three boolean checkboxes:

  ##Millimeter=boolean
  ##Centimeter=boolean
  ##Meter=boolean

  if Millimeter == True:
      # Do something
  elif Centimeter == True:
      # Do something
  elif Meter == True:
      # Do something

Germán Carrillo's answer is the most convenient. A possible alternative (if you're stuck with QGIS 2.8) could be to:

Use a string which allows the user to enter the units they want to use:

  ##units=string mm

  if units == 'mm':
      # Do something
  elif units == 'cm':
      # Do something
  elif units == 'm':
      # Do something

Or use three boolean checkboxes:

  ##Millimeter=boolean
  ##Centimeter=boolean
  ##Meter=boolean

  if Millimeter == True:
      # Do something
  elif Centimeter == True:
      # Do something
  elif Meter == True:
      # Do something

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created Dec 5, 2016 at 12:02

Joseph

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Germán Carrillo's answer is the most convenient. A possible alternative (if you're stuck with QGIS 2.8) could be to:

Use a string which allows the user to enter the units they want to use:

  ##units=string mm

  if units == 'mm':
      # Do something
  elif units == 'cm':
      # Do something
  elif units == 'm':
      # Do something

Or use three boolean checkboxes:

  ##Millimeter=boolean
  ##Centimeter=boolean
  ##Meter=boolean

  if Millimeter == True:
      # Do something
  elif Centimeter == True:
      # Do something
  elif Meter == True:
      # Do something