def trace(fout=None, format=None, byteorder=sys.byteorder, nanosecond=False):
str_check(fout or '<STR_LIT>', format or '<STR_LIT>')<EOL>return TraceFlow(fout=fout, format=format, byteorder=byteorder, nanosecond=nanosecond)<EOL>
Trace TCP flows.

    Keyword arguments:
        * fout -- str, output path
        * format -- str, output format
        * byteorder -- str, output file byte order
        * nanosecond -- bool, output nanosecond-resolution file flag