Python Brainf**k Interpreter

match=0 #var for match brackets
i=0 #program counter
tape=[0]*30000 #"infinite" tape
t_cnt=15000 #tape counter

ops={'>':'p_cnt+=1', #map of chars to python code 
   '<':'t_cnt-=1',
   '+':'tape[t_cnt]+=1',
   '-':'tape[t_cnt]-=1',
   '.':'print(chr(tape[t_cnt]),end="")',
   ',':'tape[t_cnt]=ord(input("\\n>>"))',
   '[':'if(not tape[t_cnt]):match=1',
   ']':'if(tape[t_cnt]):m=-1'} #newlines for readability

drt={'[':1,']':-1} #wee map used to tell which direction to scan for matching brackets

def bf(prog):
    global match,i,tape,t_cnt,ops,drt #Global variables because I am a bad person
    while i<len(prog):
        c = prog[i]
        if match: #try to match brackets
            match += drt[c] if c in drt else 0
        elif c in ops:
            exec(ops[c],globals()) #Weird python 3 behavior with exec, had to make variables global.
        i += -1 if match < 0 else 1

bf('''++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.+++++++..+++.>>.<-.<.+++.------.--------.>>+.>++.''') #Hello world program found on wikipedia