# Listing 1: Überladen der Print-Funktion

import sys
def print(*args,sep='',end="\n",file=sys.stdout):
  __builtins__.print(*args)
  __builtins__.print(*args,file=open("log.file","a"))


# Listing 2: With-Block mit Datei

with open('/etc/passwd', 'r') as file:
    for line in file: 
       print line,
# file is closed


# Listing 3: Schutz eines Code-Blocks

with locked(myLock):
            # Code here executes with myLock held.  The lock is
            # guaranteed to be released when the block is left 
class locked:
    def __init__(self, lock):
        self.lock = lock
    def __enter__(self):
        self.lock.acquire()
    def __exit__(self, type, value, tb):
        self.lock.release()


# Listing 4: Import-Idiom

try:
   import cPickle as pickle
except ImportError:
   import pickle


# Listing 5: Zu portierender Code

print "sum of the integers: " , apply(lambda a,b,c: a+b+c , (2,3,4))
print "factorial of 10 :", reduce(lambda x,y: x*y, range(1,11) )
print "titles in text: ", filter( lambda word: word.istitle(),"This is a long Test".split())
print "titles in text: ", [ word for word in "This is a long Test".split() if word.istitle()]


# Listing 6: Behebung der Deprecation-Warnung

print "sum of the integers: " , (lambda a,b,c: a+b+c)(*(2,3,4))
import functools
print "factorial of 10 :", functools.reduce(lambda x,y: x*y, range(1,11) )
print "titles in text: ", filter( lambda word: word.istitle(),"This is a long Test".split())
print "titles in text: ", [ word for word in "This is a long Test".split() if word.istitle()]


# Listing 7: Nach Python 3.0 portierter Code

print("sum of the integers: " , (lambda a,b,c: a+b+c)(*(2,3,4)))
print("factorial of 10 :", reduce(lambda x,y: x*y, list(range(1,11)) ))
print("titles in text: ", [word for word in "This is a long Test".split() if word.istitle()])
print("titles in text: ", [ word for word in "This is a long Test".split() if word.istitle()])