How to use the gprof2dot.PstatsParser function in gprof2dot

def __rungprof2dot(self):
        """Runs gprof2dot which produces a full dot spec"""
        nodeLimit = Settings().getProfilerSettings().nodeLimit
        edgeLimit = Settings().getProfilerSettings().edgeLimit
        with io.StringIO() as buf:
            gprofParser = gprof2dot.PstatsParser(self.__dataFile)
            profileData = gprofParser.parse()
            profileData.prune(nodeLimit / 100.0, edgeLimit / 100.0, False, False)

            dot = gprof2dot.DotWriter(buf)
            dot.strip = False
            dot.wrap = False
            dot.graph(profileData, gprof2dot.TEMPERATURE_COLORMAP)

            output = buf.getvalue()
        return self.__postprocessFullDotSpec(output)

def _create_profile(source, get_filename=_temp_file_from_file_field):
    """
    Parse a profile from a django file field source.
    """
    with get_filename(source) as filename:
        return PstatsParser(filename).parse()

function.module = os.path.basename(module)
            function[SAMPLES] = 0
            function[TOTAL_SAMPLES] = 0
            self.profile.add_function(function)

        return function, None

formats = {
    "axe": AXEParser,
    "callgrind": CallgrindParser,
    "hprof": HProfParser,
    "json": JsonParser,
    "oprofile": OprofileParser,
    "perf": PerfParser,
    "prof": GprofParser,
    "pstats": PstatsParser,
    "sleepy": SleepyParser,
    "sysprof": SysprofParser,
    "xperf": XPerfParser,
    "dtrace": DtraceParser,
}


########################################################################
# Output


class Theme:

    def __init__(self, 
            bgcolor = (0.0, 0.0, 1.0),
            mincolor = (0.0, 0.0, 0.0),