my_brain_hurts.py

from os import*
r='s=[0]*8**5'
p=0
for c in read(0,9**9):r+='\n'+' '*p+dict(zip("><+-.,[","p+=1|p-=1|s[p]+=1|s[p]-=1|write(1,chr(s[p]))|s[p]=ord(read(0,1))|while s[p]:".split('|'))).get(c,'');p+=c in'[]'and 92-ord(c)
exec r