45 def print_tb(tb, limit=None, file=None):  argument
53     print_list(extract_tb(tb, limit=limit), file=file)
55 def format_tb(tb, limit=None):  argument
57     return extract_tb(tb, limit=limit).format()
59 def extract_tb(tb, limit=None):  argument
72     return StackSummary.extract(walk_tb(tb), limit=limit)
87 def print_exception(etype, value, tb, limit=None, file=None, chain=True):  argument
104             type(value), value, tb, limit=limit).format(chain=chain):
108 def format_exception(etype, value, tb, limit=None, chain=True):  argument
121         type(value), value, tb, limit=limit).format(chain=chain))
161 def print_exc(limit=None, file=None, chain=True):  argument
163     print_exception(*sys.exc_info(), limit=limit, file=file, chain=chain)
165 def format_exc(limit=None, chain=True):  argument
167     return "".join(format_exception(*sys.exc_info(), limit=limit, chain=chain))
169 def print_last(limit=None, file=None, chain=True):  argument
175                     limit, file, chain)
181 def print_stack(f=None, limit=None, file=None):  argument
190     print_list(extract_stack(f, limit=limit), file=file)
193 def format_stack(f=None, limit=None):  argument
197     return format_list(extract_stack(f, limit=limit))
200 def extract_stack(f=None, limit=None):  argument
211     stack = StackSummary.extract(walk_stack(f), limit=limit)
319     def extract(klass, frame_gen, *, limit=None, lookup_lines=True,  argument
332         if limit is None:
333             limit = getattr(sys, 'tracebacklimit', None)
334             if limit is not None and limit < 0:
335                 limit = 0
336         if limit is not None:
337             if limit >= 0:
338                 frame_gen = itertools.islice(frame_gen, limit)
340                 frame_gen = collections.deque(frame_gen, maxlen=-limit)
465     def __init__(self, exc_type, exc_value, exc_traceback, *, limit=None,  argument
482                 limit=limit,
494                 limit=limit,
507             walk_tb(exc_traceback), limit=limit, lookup_lines=lookup_lines,