#??????checkbox
#??????????xpath
checkboxs = bigc_Driver.find_elements_by_xpath("//input[@type='checkbox']")
#??????????tag_name
#checkboxs = bigc_Driver.find_elements_by_tag_name("input")
print len(checkboxs)
for a in checkboxs:
if a.get_attribute('value')=='1':
a.click()

??????н????

?????????????
???????????????????????????xpath???????????3???????tag_name???????????35????????xpath????????
????????????????????????е??????????checkbox???????????????????????