def get_from_env_or_user_or_default(environ_cp, var_name, ask_for_var,
                                    var_default):
  """Get var_name either from env, or user or default.

  If var_name has been set as environment variable, use the preset value, else
  ask for user input. If no input is provided, the default is used.

  Args:
    environ_cp: copy of the os.environ.

   For example, the following pseudo MLIR code (types are left out for
   brevity)
   ```mlir
     func.func @hoist_loop_invariant(%arg0, %arg1) {
%var = "tf.VarHandleOp"() {container="", shared_name="var_name", device = "/device:CPU:0"}
       %results:2 = "tf.WhileRegion"(%arg0, %arg1) ({
       ^bb0(%arg2, %arg3):
         %0 = "tf.OpA"() {is_stateless = true}
         "tf.Yield"(%0)
       }, {

            this.elementName = elementName;
            this.elementType = elementType;
            this.varName = varName;
        }

        @Override
        public void writeCodeTo(PrettyPrinter printer) {
            Statement statement = printer.syntax.createContainerElement(comment, container, elementName, elementType, varName, body.statements);
            printer.printStatement(statement);
        }

        @Override

// strings.
func reasonNames(reasons ConflictReasons) string {
	var varNames []string
	for _, reason := range reasons {
		switch reason {
		case ErrReasonBindConflict:
			varNames = append(varNames, "ErrReasonBindConflict")
		case ErrReasonNodeConflict:
			varNames = append(varNames, "ErrReasonNodeConflict")
		case ErrReasonNotEnoughSpace:
			varNames = append(varNames, "ErrReasonNotEnoughSpace")
		default:

                    // field bar.
                    if (!testVanillaNameForClass(varName)) {
                        return null;
                    }
                    doInitialClassTest = false;
                    name = varName;
                } else {
                    name = varName + "." + name;
                }
                break;

        arg_attr += '{{tfr.name="{}"'.format(attr_def.name)
        if attr_def.HasField('default_value'):
          default_val = _get_val_from_proto(arg_type, attr_def.default_value)
          arg_attr += ',tfr.default={}'.format(default_val)
        arg_attr += '}'

      idx += 1
      arg_str = '{}: {}{}'.format(arg_name, arg_type, arg_attr)

					// generated by the linker to save/restore callee save registers?
					// These are defined similarly for both PPC64 ELF and ELFv2.
					targName := ldr.SymName(r.Sym())
					if strings.HasPrefix(targName, "_save") || strings.HasPrefix(targName, "_rest") {
						if sym, firstUse := rewriteABIFuncReloc(ctxt, ldr, targName, r); firstUse {
							abifuncs = append(abifuncs, sym)
						}
					}
				case sym.STEXT:
					targ := r.Sym()

                throws MalformedURLException {
            if (state == State.PUB) {
                // this is a published artifact
                String artName = elvis(substitute(attributes.getValue("name")), getMd().getModuleRevisionId().getName());
                String type = elvis(substitute(attributes.getValue("type")), "jar");

			if p != 0 {
				t.Errorf("TestCountByteNoMatch(%q, 0) = %d", b[i:i+window], p)
			}
			for j := 0; j < window; j++ {
				b[i+j] = byte(0)
			}
		}
	}
}

var bmbuf []byte

func valName(x int) string {
	if s := x >> 20; s<<20 == x {
		return fmt.Sprintf("%dM", s)
	}
	if s := x >> 10; s<<10 == x {
		return fmt.Sprintf("%dK", s)
	}
	return fmt.Sprint(x)
}

TF_CAPI_EXPORT extern TF_DataType TF_OperationOutputType(TF_Output oper_out);
TF_CAPI_EXPORT extern int TF_OperationOutputListLength(TF_Operation* oper,
                                                       const char* arg_name,
                                                       TF_Status* status);

TF_CAPI_EXPORT extern int TF_OperationNumInputs(TF_Operation* oper);
TF_CAPI_EXPORT extern TF_DataType TF_OperationInputType(TF_Input oper_in);