Why is there an error in the console when I try to run a test?

Question

Python

Just started learning Python and automation in general. What have I done wrong?
error:
driver = self.driver
__________________ ^
TabError: inconsistent use of tabs and spaces in indentation
code:

def test_pywebdrived_client_reg(self):
    driver = self.driver
    driver.get("http://random:81")
    code = driver.find_element_by_id("`agent_code`").text
    title = driver.find_element_by_id("`title`").text
    fname = driver.find_element_by_id("`fname`").text
    lname = driver.find_element_by_id("`lname`").text
    company = driver.find_element_by_id("`com_name`").text
    random_id = round(random.random()*1000000+random.random()*1000000)
    random_id = str(random_id)
    domain = 'autotest'+random_id
    email = 'autotest'+random_id+'@mailinator.com'
    password = driver.find_element_by_id("`pass`").text
    phone = driver.find_element_by_id("`phone`").text
    str_adr = driver.find_element_by_id("`str_adr`").text
    city = driver.find_element_by_id("`city`").text
    state = driver.find_element_by_id("`state`").text
    zip = driver.find_element_by_id("`zip`").text

Answer 1

You have a mess with indents. Use spaces everywhere instead of tabs.