Used python v201502 the AdGroupService give me back the wrong microAmount

first of all, I used AdGroupService api to update the adgroup's microAmount to '900'

why my KEYWORDS_PERFORMANCE_REPORT report has no data ?

I used ADGROUP_PERFORMANCE_REPORT report type can give me back some data about 'CampaignId', 'CampaignName','Clicks' ,but used KEYWORDS_PERFORMANCE_REPORT give me noting ? who knows why？ -- -- =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ Also find us on our blog and Google+: htt