def print_tb(tb, limit=None, file=None):
    if file is None:
        file = sys.stderr
    if limit is None:
        if hasattr(sys, 'tracebacklimit'):
            limit = sys.tracebacklimit
    n = 0
    while tb is not None and (limit is None or n < limit):
        f = tb.tb_frame
        lineno = tb.tb_lineno
        co = f.f_code
        filename = co.co_filename
        name = co.co_name
        _print(file,
               '  File "%s", line %d, in %s' % (filename,lineno,name))
        linecache.checkcache(filename)
        line = linecache.getline(filename, lineno, f.f_globals)
        if line: _print(file, '    ' + line.strip())
        tb = tb.tb_next
        n = n+1
Print up to 'limit' stack trace entries from the traceback 'tb'.
dataset/ETHPy150Open babble/babble/include/jython/Lib/traceback.py/print_tb