46 def print_tb(tb, limit=None, file=None):  argument
56     if limit is None:
58             limit = sys.tracebacklimit
60     while tb is not None and (limit is None or n < limit):
74 def format_tb(tb, limit = None):  argument
76     return format_list(extract_tb(tb, limit))
78 def extract_tb(tb, limit = None):  argument
89     if limit is None:
91             limit = sys.tracebacklimit
94     while tb is not None and (limit is None or n < limit):
110 def print_exception(etype, value, tb, limit=None, file=None):  argument
125         print_tb(tb, limit, file)
130 def format_exception(etype, value, tb, limit = None):  argument
141         list = list + format_tb(tb, limit)
225 def print_exc(limit=None, file=None):  argument
233         print_exception(etype, value, tb, limit, file)
238 def format_exc(limit=None):  argument
242         return ''.join(format_exception(etype, value, tb, limit))
247 def print_last(limit=None, file=None):  argument
255                     limit, file)
258 def print_stack(f=None, limit=None, file=None):  argument
270     print_list(extract_stack(f, limit), file)
272 def format_stack(f=None, limit=None):  argument
279     return format_list(extract_stack(f, limit))
281 def extract_stack(f=None, limit = None):  argument
295     if limit is None:
297             limit = sys.tracebacklimit
300     while f is not None and (limit is None or n < limit):