code: def argument(a: Argument) -> PythonArgument:
      return PythonArgument(
          name=a.name,
          type=a.type,
          # TODO: directly translate a.default to python default
          default=str(
              pythonify_default(
                  cpp.default_expr(a.default, a.type, symint=False)
              )
          )
          if a.default is not None
          else None,
          default_init=None,
      )
  
imports: from dataclasses import dataclass
  from typing import Dict, List, Optional, Sequence, Set, Tuple, Union
  from torchgen.api import cpp
  from torchgen.api.types import Binding, CppSignature, CppSignatureGroup
  from torchgen.gen import pythonify_default
  from torchgen.model import Argument, BaseTy, BaseType, FunctionSchema, ListType, NativeFunction, OptionalType, Return, Type, Variant
label_desc: Use image node_id 5 for calling a global function with example usage: argument(a) and returns: PythonArgument