Update search.py
Update search.py

str is a keyword. Refactored variable to search_str.
jimcortez/spotipy_twisted,mattdennewitz/spotipy,JMPerez/spotipy,mayblue9/spotipy,joohoi/spotipy,jimcortez/spotipy_twisted,mattiamaestrini/spotipy,JMPerez/spotipy,rcompton/spotipy,code-kitchen/spotipy,rcompton/spotipy,rlkelly/spotipy,rcompton/spotipy,plamere/spotipy,binnisb/spotipy,Guidofaassen/spotipy,Guidofaassen/spotipy,binnisb/spotipy,Guidofaassen/spotipy,binnisb/spotipy