You are probably looking for 'chr()':
>>> L = [104, 101, 108, 108, 111, 44, 32, 119, 111, 114, 108, 100]>>> ''.join(chr(i) for i in L)'hello, world'
Same basic solution as others, but I personally prefer to use map instead of the list comprehension:
>>> L = [104, 101, 108, 108, 111, 44, 32, 119, 111, 114, 108, 100]>>> ''.join(map(chr,L))'hello, world'
import arraydef f7(list): return array.array('B', list).tostring()
from Python Patterns - An Optimization Anecdote