Multiple for loops selenium webdriver

[KRS]

I have a code which looks this:

for elem in browser.find_elements_by_xpath('/html/body/form[2]/table/tbody/tr[1]/td[1]/select/option'):
  elem.click()
  sleep(2)
  for ele in browser.find_elements_by_xpath('/html/body/form[2]/table/tbody/tr[1]/td[2]/table/tbody/tr[1]/td[1]/select/option'):
    ele.click()

It shows up an error of Stale Element. This code is just a sample - I have multiple of these nested for loops.

What should I do?

[Larz60+]

why is this in a loop at all?
what is the URL?

[KRS]

StaleElementReferenceException Traceback (most recent call last)
<ipython-input-4-68ac917a3735> in <module>()
2 elem.click()
3 for ele in second_op:
----> 4 ele.click()
5
6 browser.find_element_by_xpath('/html/body/form[2]/table/tbody/tr[1]/td[2]/table/tbody/tr[2]/td/a').click()

c:\python27\lib\site-packages\selenium\webdriver\remote\webelement.pyc in click(self)
78 def click(self):
79 """Clicks the element."""
---> 80 self._execute(Command.CLICK_ELEMENT)
81
82 def submit(self):

c:\python27\lib\site-packages\selenium\webdriver\remote\webelement.pyc in _execute(self, command, params)
631 params = {}
632 params['id'] = self._id
--> 633 return self._parent.execute(command, params)
634
635 def find_element(self, by=By.ID, value=None):

c:\python27\lib\site-packages\selenium\webdriver\remote\webdriver.pyc in execute(self, driver_command, params)
319 response = self.command_executor.execute(driver_command, params)
320 if response:
--> 321 self.error_handler.check_response(response)
322 response['value'] = self._unwrap_value(
323 response.get('value', None))

c:\python27\lib\site-packages\selenium\webdriver\remote\errorhandler.pyc in check_response(self, response)
240 alert_text = value['alert'].get('text')
241 raise exception_class(message, screen, stacktrace, alert_text)
--> 242 raise exception_class(message, screen, stacktrace)
243
244 def _value_or_default(self, obj, key, default):

StaleElementReferenceException: Message: stale element reference: element is not attached to the page document

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it is a census data. I need to run through all list of communities, within that each province, municipality and so on.

[Larz60+]

Please answer question, why loops.

[KRS]

I need loops because I need to go through multiple lists..

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it is a census data. I need to run through all list of communities, within that each province, municipality and so on.