old_contents: from . import schemes
  
  VALID_COMPARISONS=['eq','ne','gt','lt','ge','le']
  
  def is_valid(version):
      try:
          schemes.schemes['semver'](version)
      except schemes.InvalidVersionError:
          return False
      return True
  
  def verify_list(versions, comparison='lt', scheme='semver'):
      """
      Verify that a list of versions all match comparison
      Returns True if the versions are in order
  
      Arguments:
      versions -- a list of version strings
      comparison -- the comparison to evaluate on the list
      scheme -- the versioning scheme to use
      """
      if len(versions) < 2:
          raise ValueError('You must provide at least two versions to compare')
  
      if comparison not in VALID_COMPARISONS:
          raise ValueError('Invalid comparison "%s" - options are %s' % (comparison, '/'.join(c for c in core.VALID_COMPARISONS)))
  
      if scheme not in schemes.schemes:
          raise ValueError('Invalid scheme "%s" - options are %s' % (scheme, '/'.join(s for s in schemes.schemes)))
  
      prev = schemes.schemes[scheme](versions[0])
      for curr in versions[1:]:
          curr = schemes.schemes[scheme](curr)
          if comparison == 'eq':
              res = prev == curr
          elif comparison == 'ne':
              res = prev != curr
          elif comparison == 'gt':
              res = prev > curr
          elif comparison == 'lt':
              res = prev < curr
          elif comparison == 'ge':
              res = prev >= curr
          elif comparison == 'le':
              res = prev <= curr
          if not res:
              print('ERROR: %s %s %s' % (prev, comparison_symbol(prev, curr), curr))
              return False
          prev = curr
      return True
  
  def comparison_symbol(v1, v2):
      """
      Returns a character representation of the relationship between two objects
      """
      if v1 == v2:
          return '=='
      elif v1 > v2:
          return '>'
      elif v1 < v2:
          return '<'
      else:
          raise RuntimeError('Could not compare "%s" and "%s"' % (v1, v2))
  
  
new_contents: from . import schemes
  
  VALID_COMPARISONS=['eq','ne','gt','lt','ge','le']
  
  def is_valid(version):
      try:
          schemes.schemes['semver'](version)
      except schemes.InvalidVersionError:
          return False
      return True
  
  def verify_list(versions, comparison='lt', scheme='semver'):
      """
      Verify that a list of versions all match comparison
      Returns True if the versions are in order
  
      Arguments:
      versions -- a list of version strings
      comparison -- the comparison to evaluate on the list
      scheme -- the versioning scheme to use
      """
      if len(versions) < 2:
          raise ValueError('You must provide at least two versions to compare')
  
      if comparison not in VALID_COMPARISONS:
          raise ValueError('Invalid comparison "%s" - options are %s' % (comparison, '/'.join(c for c in VALID_COMPARISONS)))
  
      if scheme not in schemes.schemes:
          raise ValueError('Invalid scheme "%s" - options are %s' % (scheme, '/'.join(s for s in schemes.schemes)))
  
      prev = schemes.schemes[scheme](versions[0])
      for curr in versions[1:]:
          curr = schemes.schemes[scheme](curr)
          if comparison == 'eq':
              res = prev == curr
          elif comparison == 'ne':
              res = prev != curr
          elif comparison == 'gt':
              res = prev > curr
          elif comparison == 'lt':
              res = prev < curr
          elif comparison == 'ge':
              res = prev >= curr
          elif comparison == 'le':
              res = prev <= curr
          if not res:
              print('ERROR: %s %s %s' % (prev, comparison_symbol(prev, curr), curr))
              return False
          prev = curr
      return True
  
  def comparison_symbol(v1, v2):
      """
      Returns a character representation of the relationship between two objects
      """
      if v1 == v2:
          return '=='
      elif v1 > v2:
          return '>'
      elif v1 < v2:
          return '<'
      else:
          raise RuntimeError('Could not compare "%s" and "%s"' % (v1, v2))
  
  
subject: Fix another issue - thanks Landscape.io!