parse_csv.py

## http://pastebin.ubuntu.com/11974308/
## problemas con encoding Ã

import codecs
import csv

def gen():
    f = codecs.open("Ventas.csv", "rb", "utf16")
    yield next(f).encode("utf-8")
    for i in f:
        yield i.encode("raw_unicode_escape")

r = csv.DictReader(gen())

for line in r:
    print(line)

parse_csv2.py

>>> with open("Ventas.csv", "rb") as fh:
...   data = fh.read().decode("utf16")
... 
>>> for i, line in enumerate(data.split("\n")):
...   print line.encode("latin1").decode("utf8") if i else line

parse_csv3.py

import codecs
import csv

def a2u(s):
    try:
        return s.decode("utf-8")
    except UnicodeDecodeError:
        return s.decode("latin1")

def gen():
    f = codecs.open("Ventas.csv", "rb", "utf-16-le")
    yield next(f).encode("utf-8")
    for i in f:
        v = i.encode("raw_unicode_escape")
        yield v

data = [map(a2u, i) for i in csv.reader(gen())]

for row in data:
    for col in row:
        # col es unicode; para imprimir, pasarlo a utf8 o lo que
        # tengas la consola si no a consola directa python sabe, pero
        # si lo mandás a un pipe no va a saber
        print col.encode("utf-8"),
    print