In order to know does SitecoreSitecore
thinks the user is human, it saves true or false value to cookie SC_ANALYTICS_GLOBAL_COOKIESC_ANALYTICS_GLOBAL_COOKIE
.
For example if the value of cookie SC_ANALYTICS_GLOBAL_COOKIESC_ANALYTICS_GLOBAL_COOKIE
is: ef86f68776cf417db46dd217cc60807d|Trueef86f68776cf417db46dd217cc60807d|True
Sitecore thinks the user is human. If the value is false Sitecore thinks it is a robot. You could try to read this value with the same python script and see does Sitecore thinks its a robot or not. If the value is false(robot), the problem probably lies in a form itself.