class_docstr: A super-simple branch coverage tracer.
class_docstr_tok: ["A","super-simple","branch","coverage","tracer","."]
code: def __init__(self):
      self.branches: Trace = set()
      self._previous_location = None
  
imports: import functools
  import os
  import subprocess
  import sys
  import types
  from collections import defaultdict
  from functools import lru_cache, reduce
  from os import sep
  from pathlib import Path
  from typing import TYPE_CHECKING, Dict, List, Optional, Set, Tuple
  from hypothesis._settings import Phase, Verbosity
  from hypothesis.internal.escalation import is_hypothesis_file
label_desc: Use image node_id 1 to create a new Tracer object  with example: obj = Tracer()