As per the HTML you can use the find_element_by_link_text
and invoke click()
method as follows :
driver.find_element_by_link_text("Expand all").click()
You can get more granualar with find_element_by_xpath
as follows :
driver.find_element_by_xpath("//a[@class='sectionname' and contains(.,'Expand all')]").click()
Update
As you still don't see the expansion you can try the Javascript way as follows :
myElement = driver.find_element_by_xpath("//a[@class='sectionname' and contains(.,'Expand all')]")
driver.execute_script("arguments[0].click();", myElement)
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