global dropdown_counter
dropdown_counter = 1
global str_counter
str_counter = str(dropdown_counter)
global dropdown_link
def open_dropdowns(xpath):
    for _ in range(23):
        str_counter = str(dropdown_counter)
        dropdown_link = '/html/body/div[1]/div/div[2]/div/div/div[2]/div[1]/nav/div/div/div/div/div[2]/ol/li[' + str_counter + xpath
        driver.find_element_by_xpath(dropdown_link).click()
        dropdown_counter +=1
    dropdown_counter = 1
open_dropdowns(']/span/button')
open_dropdowns(']/ol/li[1]/span/button')

'''
I defined all the variables as global but im still getting this error


Traceback (most recent call last):
  File ".\ustech.py", line 58, in <module>
    open_dropdowns(']/span/button')
  File ".\ustech.py", line 53, in open_dropdowns
    str_counter = str(dropdown_counter)
UnboundLocalError: local variable 'dropdown_counter' referenced before assignment

'''