class_docstr: Call libvips operations.
  
  This class wraps the libvips VipsOperation class.
class_docstr_tok: ["Call","libvips","operations",".","This","class","wraps","the","libvips","VipsOperation","class","."]
code: def new_from_name(operation_name):
      vop = vips_lib.vips_operation_new(_to_bytes(operation_name))
      if vop == ffi.NULL:
          raise Error("no such operation {0}".format(operation_name))
      return Operation(vop)
  
imports: from __future__ import division, print_function
  import logging
  import pyvips
  from pyvips import ffi, vips_lib, Error, _to_bytes, _to_string, GValue, type_map, type_from_name, nickname_find, at_least_libvips
label_desc: Use image node_id 2 for calling the Operation obj's underlying member method code with example usage: obj.new_from_name(operation_name) and returns: Operation