How to use the platformio.__version__ function in platformio

def cli(dev):
    if not dev and __version__ == get_latest_version():
        return click.secho(
            "You're up-to-date!\nPlatformIO %s is currently the "
            "newest version available." % __version__,
            fg="green")

    click.secho("Please wait while upgrading PlatformIO ...", fg="yellow")

    to_develop = dev or not all(c.isdigit() for c in __version__ if c != ".")
    cmds = (["pip", "install", "--upgrade",
             get_pip_package(to_develop)], ["platformio", "--version"])

    cmd = None
    r = {}
    try:
        for cmd in cmds:
            cmd = [get_pythonexe_path(), "-m"] + cmd

def pioversion_to_intstr():
    vermatch = re.match(r"^([\d\.]+)", __version__)
    assert vermatch
    return [int(i) for i in vermatch.group(1).split(".")[:3]]

def pioversion_to_intstr():
    vermatch = re.match(r"^([\d\.]+)", __version__)
    assert vermatch
    return [int(i) for i in vermatch.group(1).split(".")[:3]]

def load_state():
        with app.State(AppRPC.APPSTATE_PATH, lock=True) as state:
            storage = state.get("storage", {})

            # base data
            caller_id = app.get_session_var("caller_id")
            storage['cid'] = app.get_cid()
            storage['coreVersion'] = __version__
            storage['coreSystype'] = util.get_systype()
            storage['coreCaller'] = (str(caller_id).lower()
                                     if caller_id else None)
            storage['coreSettings'] = {
                name: {
                    "description": data['description'],
                    "default_value": data['value'],
                    "value": app.get_setting(name)
                }
                for name, data in app.DEFAULT_SETTINGS.items()
            }

            storage['homeDir'] = expanduser("~")
            storage['projectsDir'] = storage['coreSettings']['projects_dir'][
                'value']

def cli():
    last = get_latest_version()
    if __version__ == last:
        return click.secho(
            "You're up-to-date!\nPlatformIO %s is currently the "
            "newest version available." % __version__, fg="green"
        )
    else:
        click.secho("Please wait while upgrading PlatformIO ...",
                    fg="yellow")

        cmds = (
            ["pip", "install", "--upgrade", "platformio"],
            ["platformio", "--version"]
        )

        cmd = None
        r = None
        try:
            for cmd in cmds:
                r = None
                r = util.exec_command(cmd)

def get_request_defheaders():
    import requests
    return {"User-Agent": "PlatformIO/%s CI/%d %s" % (
        __version__, int(is_ci()), requests.utils.default_user_agent()
    )}

def compute_project_checksum(config):
    # rebuild when PIO Core version changes
    checksum = sha1(hashlib_encode_data(__version__))

    # configuration file state
    checksum.update(hashlib_encode_data(config.to_json()))

    # project file structure
    check_suffixes = (".c", ".cc", ".cpp", ".h", ".hpp", ".s", ".S")
    for d in (get_project_include_dir(), get_project_src_dir(),
              get_project_lib_dir()):
        if not isdir(d):
            continue
        chunks = []
        for root, _, files in walk(d):
            for f in files:
                path = join(root, f)
                if path.endswith(check_suffixes):
                    chunks.append(path)

def version():
        return __version__

def __exit__(self, type_, value, traceback):
        if self._prev_state != self._state:
            with open(self.path, "w") as fp:
                if "dev" in __version__:
                    json.dump(self._state, fp, indent=4)
                else:
                    json.dump(self._state, fp)
        self._unlock_state_file()

def after_upgrade(ctx):
    last_version = app.get_state_item("last_version", "0.0.0")
    if last_version == __version__:
        return

    terminal_width, _ = click.get_terminal_size()

    # promotion
    click.echo("")
    click.echo("*" * terminal_width)
    click.echo("If you like %s, please:" % (
        click.style("PlatformIO", fg="cyan")
    ))
    click.echo(
        "- %s us on Twitter to stay up-to-date "
        "on the latest project news > %s" %
        (click.style("follow", fg="cyan"),
         click.style("https://twitter.com/PlatformIO_Org", fg="cyan"))
    )