code: def format_variable(self, var: Variable) -> str:
      return "{} = {}".format(
          var.name,
          self.format_variable_value(var.value),
      )
  
imports: import inspect
  import sys
  import traceback
  from types import FrameType, TracebackType
  from typing import Union, Iterable
  from stack_data import style_with_executing_node, Options, Line, FrameInfo, LINE_GAP, Variable, RepeatedFrames, BlankLineRange, BlankLines
  from stack_data.utils import assert_
label_desc: Use image node_id 15 for calling the Formatter obj's underlying member method code with example usage: obj.format_variable(var) and returns: str