How to use the pyflakes.reporter._makeDefaultReporter function in pyflakes

def run(self):
        # Don't import the pyflakes code until now because setup.py needs to be
        # able to install Pyflakes if its missing. This localizes the import to
        # only after the setuptools code has run and verified everything is
        # installed.
        from pyflakes import api
        from pyflakes import reporter

        # Run the Pyflakes check against our package and check its output
        val = api.checkRecursive([PACKAGE], reporter._makeDefaultReporter())
        if val > 0:
            sys.exit('ERROR: Pyflakes failed with exit code %d' % val)

def main(prog=None):
    """Entry point for the script "pyflakes"."""
    import optparse

    # Handle "Keyboard Interrupt" and "Broken pipe" gracefully
    _exitOnSignal('SIGINT', '... stopped')
    _exitOnSignal('SIGPIPE', 1)

    parser = optparse.OptionParser(prog=prog, version=__version__)
    (__, args) = parser.parse_args()
    reporter = modReporter._makeDefaultReporter()
    if args:
        warnings = checkRecursive(args, reporter)
    else:
        warnings = check(sys.stdin.read(), '', reporter)
    raise SystemExit(warnings > 0)

    @param codeString: The Python source to check.
    @type codeString: C{str}

    @param filename: The name of the file the source came from, used to report
        errors.
    @type filename: C{str}

    @param reporter: A L{Reporter} instance, where errors and warnings will be
        reported.

    @return: The number of warnings emitted.
    @rtype: C{int}
    """
    if reporter is None:
        reporter = modReporter._makeDefaultReporter()
    # First, compile into an AST and handle syntax errors.
    try:
        tree = compile(codeString, filename, "exec", _ast.PyCF_ONLY_AST)
    except SyntaxError:
        value = sys.exc_info()[1]
        msg = value.args[0]

        (lineno, offset, text) = value.lineno, value.offset, value.text

        # If there's an encoding problem with the file, the text is None.
        if text is None:
            # Avoid using msg, since for the only known case, it contains a
            # bogus message that claims the encoding the file declared was
            # unknown.
            reporter.unexpectedError(filename, 'problem decoding source')
        else:

def checkPath(filename, reporter=None):
    """
    Check the given path, printing out any warnings detected.

    @param reporter: A L{Reporter} instance, where errors and warnings will be
        reported.

    @return: the number of warnings printed
    """
    if reporter is None:
        reporter = modReporter._makeDefaultReporter()
    try:
        with open(filename, 'rb') as f:
            codestr = f.read()
    except IOError:
        msg = sys.exc_info()[1]
        reporter.unexpectedError(filename, msg.args[1])
        return 1
    return check(codestr, filename, reporter)

def checkPath(filename, reporter=None):
    """
    Check the given path, printing out any warnings detected.

    @param reporter: A L{Reporter} instance, where errors and warnings will be
        reported.

    @return: the number of warnings printed
    """
    if reporter is None:
        reporter = modReporter._makeDefaultReporter()
    try:
        # in Python 2.6, compile() will choke on \r\n line endings. In later
        # versions of python it's smarter, and we want binary mode to give
        # compile() the best opportunity to do the right thing WRT text
        # encodings.
        if sys.version_info < (2, 7):
            mode = 'rU'
        else:
            mode = 'rb'

        with open(filename, mode) as f:
            codestr = f.read()
        if sys.version_info < (2, 7):
            codestr += '\n'     # Work around for Python <= 2.6
    except UnicodeError:
        reporter.unexpectedError(filename, 'problem decoding source')

    @param codeString: The Python source to check.
    @type codeString: C{str}

    @param filename: The name of the file the source came from, used to report
        errors.
    @type filename: C{str}

    @param reporter: A L{Reporter} instance, where errors and warnings will be
        reported.

    @return: The number of warnings emitted.
    @rtype: C{int}
    """
    if reporter is None:
        reporter = modReporter._makeDefaultReporter()
    # First, compile into an AST and handle syntax errors.
    try:
        tree = compile(codeString, filename, "exec", _ast.PyCF_ONLY_AST)
    except SyntaxError:
        value = sys.exc_info()[1]
        msg = value.args[0]

        (lineno, offset, text) = value.lineno, value.offset, value.text

        # If there's an encoding problem with the file, the text is None.
        if text is None:
            # Avoid using msg, since for the only known case, it contains a
            # bogus message that claims the encoding the file declared was
            # unknown.
            reporter.unexpectedError(filename, 'problem decoding source')
        else:

def checkPath(filename, reporter=None):
    """
    Check the given path, printing out any warnings detected.

    @param reporter: A L{Reporter} instance, where errors and warnings will be
        reported.

    @return: the number of warnings printed
    """
    if reporter is None:
        reporter = modReporter._makeDefaultReporter()
    try:
        with open(filename, 'rb') as f:
            codestr = f.read()
    except UnicodeError:
        reporter.unexpectedError(filename, 'problem decoding source')
        return 1
    except IOError:
        msg = sys.exc_info()[1]
        reporter.unexpectedError(filename, msg.args[1])
        return 1
    return check(codestr, filename, reporter)

    @param codeString: The Python source to check.
    @type codeString: C{str}

    @param filename: The name of the file the source came from, used to report
        errors.
    @type filename: C{str}

    @param reporter: A L{Reporter} instance, where errors and warnings will be
        reported.

    @return: The number of warnings emitted.
    @rtype: C{int}
    """
    if reporter is None:
        reporter = modReporter._makeDefaultReporter()
    # First, compile into an AST and handle syntax errors.
    try:
        tree = compile(codeString, filename, "exec", _ast.PyCF_ONLY_AST)
    except SyntaxError:
        value = sys.exc_info()[1]
        msg = value.args[0]

        (lineno, offset, text) = value.lineno, value.offset, value.text

        # If there's an encoding problem with the file, the text is None.
        if text is None:
            # Avoid using msg, since for the only known case, it contains a
            # bogus message that claims the encoding the file declared was
            # unknown.
            reporter.unexpectedError(filename, 'problem decoding source')
        else: