How to use the mechanicalsoup.Form function in MechanicalSoup

def test_submit_set(httpbin):
    """Complete and submit the pizza form at http://httpbin.org/forms/post """
    browser = mechanicalsoup.Browser()
    page = browser.get(httpbin + "/forms/post")
    form = mechanicalsoup.Form(page.soup.form)

    form["custname"] = "Philip J. Fry"

    form["size"] = "medium"
    form["topping"] = ("cheese", "onion")

    form["comments"] = "freezer"

    response = browser.submit(form, page.url)

    # helpfully the form submits to http://httpbin.org/post which simply
    # returns the request headers in json format
    json = response.json()
    data = json["form"]
    assert data["custname"] == "Philip J. Fry"
    assert data["custtel"] == ""  # web browser submits "" for input left blank

def test_construct_form_fail():
    """Form objects must be constructed from form html elements."""
    soup = bs4.BeautifulSoup('This is not a form', 'lxml')
    tag = soup.find('notform')
    assert isinstance(tag, bs4.element.Tag)
    pytest.deprecated_call(mechanicalsoup.Form, tag)

def log_into_sso(credentials) -> ms.Browser:
    browser = ms.Browser(soup_config={"features":"lxml"}) # html.parser
    page = browser.get(SSO_URL)
    message = page.soup.select("#msg")
    if message and not 'class="success"' in str(message): raise Exception(message[0])

    form = ms.Form(page.soup.select('#fm1')[0])
    form["username"] = credentials["username"]
    form["password"] = credentials["password"]
    page = browser.submit(form, page.url)

    message = page.soup.select("#msg")
    if message and not 'class="success"' in str(message): raise Exception(message[0])

    return browser

}
		
	try:
		browser = mechanicalsoup.StatefulBrowser(
			soup_config={'features': 'html'},
			raise_on_404=True,
			user_agent=useragent,
		)

		page = browser.open('https://www.gmail.com')

		user_form = browser.select_form('form')
		user_form.set('Email', username)
		user_response = browser.submit(user_form, page.url)

		pass_form = mechanicalsoup.Form(user_response.soup.form)
		pass_form.set('Passwd', password)
		pass_response = browser.submit(pass_form, page.url)

		raw_headers = pass_response.headers
		soup = pass_response.soup
		raw = soup.text

		sms = soup.find('input', {'id': 'idvPreregisteredPhonePin'})
		sms_old = soup.find('button', {'id': 'idvPreresteredPhoneSms'})
		u2f = soup.find('input', {'id': 'id-challenge'})
		touch = soup.find('input', {'id': 'authzenToken'})
		authenticator = soup.find('input', {'id': 'totpPin'})
		backup = soup.find('input', {'id': 'backupCodePin'})

		if 'Wrong password. Try again.' in raw:
			data_response['success'] = False

def get_courses_of_semester(semester):
    soup = state.tucan_br.getcached(state.TUCAN_START_URL)
    soup = state.tucan_br.getcached(TUCAN_URL + soup.select_one('li[title="Lehrveranstaltungssuche"] a')['href'])
    form = ms.Form(soup.select_one("#findcourse"))
    form['course_catalogue'] = semester
    form['with_logo'] = '2' # we need two criteria to start search, this should show everything
    form.choose_submit("submit_search")
    page = state.tucan_br.submit(form, TUCAN_URL + form.form['action'])
    return walk_tucan_list(page.soup)

if 'Wrong password. Try again.' in raw:
			data_response['success'] = False
		elif 'Loading {}'.format(username) in raw:
			data_response['success'] = True

		if 'you need to change your password' in raw:
			data_response['change'] = True
			data_response['success'] = True

		if sms or sms_old:
			data_response['type'] = 'sms'
			data_response['2fa_enabled'] = True
			data_response['success'] = True

			if sms_old:
				final_form = mechanicalsoup.Form(pass_response.soup.form)
				final_response = browser.submit(final_form, page.url)
				raw_headers = final_response.headers
				raw = final_response.soup.text
				data_response['type'] = 'u2f'

			code = ''
			regexes = [
				r"\d{2}(?=)",
				r"(?<=\u2022)\d{2}(?=G)",
				r"\d{2}(?=G)",
				r"\d{2}(?=\)",
				r"\d{2}(?=S)",
			]
			for regex in regexes:
				matches = re.search(regex, raw, re.UNICODE)
				if matches:

def log_into_tucan(credentials) -> ms.Browser:
    print("logging in")
    browser, page = anonymous_tucan()
    login_form = ms.Form(page.soup.select('#cn_loginForm')[0])
    login_form['usrname'] = credentials["username"]
    login_form['pass']    = credentials["password"]
    page = browser.submit(login_form, page.url)
    if not 'refresh' in page.headers:
      print(re.sub("\n+", "\n", re.sub("[ \t]+", " ", page.soup.text)))
      print("===============")
      print("This means you probably used the wrong username/password.")
      print("===============")
      sys.exit()

    print("ok")
    redirected_url = "=".join(page.headers['REFRESH'].split('=')[1:])
    page = browser.get(TUCAN_URL + redirected_url)
    page = browser.get(_get_redirection_link(page))

    state.TUCAN_START_URL = page.url