A poor-man's Scanner in Python, provided as a function that takes a file object and returns an iterator whose next() works like Java's Scanner.next().

easy_scanner.py

def EasyScanner(reader):
    return (word for line in reader for word in line.split())

# License: CC0 1.0 Universal
# http://creativecommons.org/publicdomain/zero/1.0/

easy_scanner_usage.py

sc = EasyScanner(sys.stdin)

s = sc.next()           # Like Scanner.next().
i = int(sc.next())      # Like Scanner.nextInt().
f = float(sc.next())    # Like Scanner.nextDouble().

# For a real example, see: http://arc015.contest.atcoder.jp/submissions/121667.