+ else:
+ if not sys.stderr.isatty() or not sys.stdin.isatty():
+ # stdin or stderr is redirected, just do the normal thing
+ ORIGINAL_EXCEPTION_HOOK(exc_type, exc_value, exc_tb)
+ else:
+ # a terminal is attached and stderr is not redirected, maybe debug.
+ import traceback
+
+ traceback.print_exception(exc_type, exc_value, exc_tb)
+ if config.config['debug_unhandled_exceptions']:
+ import pdb
+
+ logger.info("Invoking the debugger...")
+ pdb.pm()
+ else:
+ ORIGINAL_EXCEPTION_HOOK(exc_type, exc_value, exc_tb)
+
+
+class ImportInterceptor(importlib.abc.MetaPathFinder):
+ """An interceptor that always allows module load events but dumps a
+ record into the log and onto stdout when modules are loaded and
+ produces an audit of who imported what at the end of the run. It
+ can't see any load events that happen before it, though, so move
+ bootstrap up in your __main__'s import list just temporarily to
+ get a good view.
+
+ """
+
+ def __init__(self):
+ import collect.trie
+
+ self.module_by_filename_cache = {}
+ self.repopulate_modules_by_filename()
+ self.tree = collect.trie.Trie()
+ self.tree_node_by_module = {}
+
+ def repopulate_modules_by_filename(self):
+ self.module_by_filename_cache.clear()
+ for _, mod in sys.modules.copy().items(): # copy here because modules is volatile
+ if hasattr(mod, '__file__'):
+ fname = getattr(mod, '__file__')
+ else:
+ fname = 'unknown'
+ self.module_by_filename_cache[fname] = mod
+
+ @staticmethod
+ def should_ignore_filename(filename: str) -> bool:
+ return 'importlib' in filename or 'six.py' in filename
+
+ def find_module(self, fullname, path):
+ raise Exception("This method has been deprecated since Python 3.4, please upgrade.")
+
+ def find_spec(self, loaded_module, path=None, _=None):
+ s = stack()
+ for x in range(3, len(s)):
+ filename = s[x].filename
+ if ImportInterceptor.should_ignore_filename(filename):
+ continue
+
+ loading_function = s[x].function
+ if filename in self.module_by_filename_cache:
+ loading_module = self.module_by_filename_cache[filename]
+ else:
+ self.repopulate_modules_by_filename()
+ loading_module = self.module_by_filename_cache.get(filename, 'unknown')
+
+ path = self.tree_node_by_module.get(loading_module, [])
+ path.extend([loaded_module])
+ self.tree.insert(path)
+ self.tree_node_by_module[loading_module] = path
+
+ msg = f'*** Import {loaded_module} from {filename}:{s[x].lineno} in {loading_module}::{loading_function}'
+ logger.debug(msg)
+ print(msg)
+ return
+ msg = f'*** Import {loaded_module} from ?????'
+ logger.debug(msg)
+ print(msg)