class_docstr: Perform a column operation. If inplace is True, then cbind the result onto original frame,
  otherwise, perform the operation in place.
class_docstr_tok: ["Perform","a","column","operation",".","If","inplace","is","True",",","then","cbind","the","result","onto","original","frame",",","otherwise",",","perform","the","operation","in","place","."]
code: def __init__(
      self, op, col=None, inplace=True, new_col_name=None, **params
  ):
      self.fun = op
      self.col = col
      self.inplace = inplace
      self.params = params
      self.new_col_name = new_col_name
      if inplace and new_col_name is not None:
          warnings.warn(
              "inplace was False, but new_col_name was not empty. Ignoring new_col_name."
          )
      if isinstance(col, (list, tuple)):
          raise ValueError("col must be None or a single column.")
  
imports: import warnings
  from .transform_base import H2OTransformer
label_desc: Use image node_id 1 to create a new H2OColOp object from inherited base classes: H2OTransformer with example: obj = H2OColOp(op, col, inplace, new_col_name)