Concise vector adding in Python? [duplicate]

Answer 1

While Numeric is excellent, and list-comprehension solutions OK if you actually wanted to create a new list, I'm surprised nobody suggested the "one obvious way to do it" -- a simple for loop! Best:

for i, bi in enumerate(b): a[i] += bi

Also OK, kinda sorta:

for i in xrange(len(a)): a[i] += b[i]