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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 upgrade_setuptools():
 """ setuptools 12.2 can trigger a really nasty bug that eats all memory, so upgrade it to 18.8, which is known to be good. """

    # Note - I tried including the higher version in
    # setup_requires, but was still able to trigger
    # the bug. - stu.axon
    global MIN_SETUPTOOLS
    r = None
    try:
        r = pkg_resources.require(["setuptools"])[0]
    except DistributionNotFound:
        # ok, setuptools will be installed later
        return

    if StrictVersion(r.version) >= StrictVersion(MIN_SETUPTOOLS):
        return
    else:
        print("Upgrading setuptools...")
        subprocess.call("%s -mpip install 'setuptools>=%s'" % (sys.executable, MIN_SETUPTOOLS), shell=True)