code: def from_versions(cls, versions):
          
          range = cls(None)
          range.bounds = []
          for version in dedup(sorted(versions)):
              lower = _LowerBound(version, True)
              upper = _UpperBound(version, True)
              bound = _Bound(lower, upper)
              range.bounds.append(bound)
          return range
docs: Create a range from a list of versions.
  
          This method creates a range that contains only the given versions and
          no other. Typically the range looks like (for eg) "==3|==4|==5.1".
  
          Args:
              versions: List of Version objects.
  
          Returns:
              `VersionRange` object.