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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def simple_srcflux(env, infile=None, psfmethod='arfcorr', conf=0.68, verbose=0, **kwargs):
 """Run the CIAO "srcflux" script and retrieve its results. *infile* The input events file; must be specified. The computation is done in a temporary directory, so this path — and all others passed in as arguments — **must be made absolute**. *psfmethod* = "arfcorr" The PSF modeling method to be used; see the "srcflux" documentation. *conf* = 0.68 The confidence limit to detect. We default to 1 sigma, instead of the 90% mark, which is the srcflux default. *verbose* = 0 The level of verbosity to be used by the tool. *kwargs* Remaining keyword arguments are passed to the tool as command-line keyword arguments, with values stringified. Returns: A :class:`pandas.DataFrame` extracted from the results table generated by the tool. There is one row for each source analyzed; in common usage, this means that there will be one row. """

    from ...io import Path
    import shutil, signal, tempfile

    if infile is None:
        raise ValueError('must specify infile')

    kwargs.update(dict(
        infile = infile,
        psfmethod = psfmethod,
        conf = conf,
        verbose = verbose,
        clobber = 'yes',
        outroot = 'sf',
    ))

    argv = ['srcflux'] + ['%s=%s' % t for t in kwargs.items()]
    argstr = ' '.join(argv)
    tempdir = None

    try:
        tempdir = tempfile.mkdtemp(prefix='srcflux')

        proc = env.launch(argv, cwd=tempdir, shell=False)
        retcode = proc.wait()

        if retcode > 0:
            raise RuntimeError('command "%s" failed with exit code %d' % (argstr, retcode))
        elif retcode == -signal.SIGINT:
            raise KeyboardInterrupt()
        elif retcode < 0:
            raise RuntimeError('command "%s" killed by signal %d' % (argstr, -retcode))

        tables = list(Path(tempdir).glob('*.flux'))
        if len(tables) != 1:
            raise RuntimeError('expected exactly one flux table from srcflux; got %d' % len(tables))

        return tables[0].read_fits_bintable(hdu=1)
    finally:
        if tempdir is not None:
            shutil.rmtree(tempdir, onerror=_rmtree_error)